feat: deliver the redesigned desktop workspace

Rebuild downloads, link collection, settings, history, and statistics around a responsive desktop shell with compact account and queue tables, contextual navigation, persistent update affordances, unified overlays, and accessible keyboard interactions.

Add safe history-folder reveal IPC, responsive 2560/1920/1366/1120 coverage, deterministic visual fixtures, focused component regressions, and release-tree exclusions for internal working files. Bump the public application version to 2.0.13.

.gitignore

@@ -1,4 +1,12 @@
 node_modules/
+.worktrees/
+.claude/
+.codex/
+.superpowers/
+docs/superpowers/
+tasks/
+AGENTS.md
+CLAUDE.md
 build/
 dist/
 release/

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "real-debrid-downloader",
-  "version": "2.0.12",
+  "version": "2.0.13",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "real-debrid-downloader",
-      "version": "2.0.12",
+      "version": "2.0.13",
       "license": "MIT",
       "dependencies": {
         "adm-zip": "0.6.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "real-debrid-downloader",
-  "version": "2.0.12",
+  "version": "2.0.13",
   "description": "Desktop downloader",
   "main": "build/main/main/main.js",
   "author": "Sucukdeluxe",
@@ -8,6 +8,7 @@
   "scripts": {
     "dev": "concurrently -k \"npm:dev:main:watch\" \"npm:dev:renderer\" \"npm:dev:electron\"",
     "dev:renderer": "vite",
+    "visual:dev": "vite --config tests/visual/vite.config.mts --host 127.0.0.1 --port 5174 --strictPort",
     "dev:main:watch": "tsup src/main/main.ts src/preload/preload.ts --out-dir build/main --format cjs --target node20 --external electron --sourcemap --watch",
     "dev:electron": "wait-on tcp:5173 file:build/main/main/main.js && cross-env NODE_ENV=development electron .",
     "build": "npm run build:main && npm run build:renderer",

src/main/history-reveal.ts

@@ -0,0 +1,104 @@
+import { win32 } from "node:path";
+import type { HistoryEntry, HistoryRevealResult } from "../shared/types";
+
+export interface HistoryRevealRequest {
+  entryId: unknown;
+}
+
+export interface HistoryRevealStat {
+  isDirectory: () => boolean;
+}
+
+export interface HistoryRevealDependencies {
+  loadHistory: () => HistoryEntry[] | Promise<HistoryEntry[]>;
+  stat: (directory: string) => Promise<HistoryRevealStat>;
+  openPath: (directory: string) => Promise<string>;
+}
+
+function normalizeHistoryDirectory(value: unknown): string | null {
+  if (typeof value !== "string" || value.length === 0 || /[\u0000-\u001f\u007f]/.test(value)) {
+    return null;
+  }
+  const candidate = value.replaceAll("/", "\\");
+  const lower = candidate.toLocaleLowerCase("en-US");
+  if (
+    lower.startsWith("\\\\.\\")
+    || lower.startsWith("\\\\?\\")
+    || lower.startsWith("\\??\\")
+    || lower.startsWith("\\\\globalroot\\")
+    || lower.startsWith("\\\\device\\")
+  ) {
+    return null;
+  }
+  const driveAbsolute = /^[A-Za-z]:\\/.test(candidate);
+  const uncMatch = /^\\\\([^\\]+)\\([^\\]+)(?:\\.*)?$/.exec(candidate);
+  if (!driveAbsolute && !uncMatch) {
+    return null;
+  }
+  if (driveAbsolute) {
+    if (candidate.slice(2).includes(":")) {
+      return null;
+    }
+  } else if (candidate.includes(":")) {
+    return null;
+  }
+  if (/[<>|"?*]/.test(driveAbsolute ? candidate.slice(3) : candidate.slice(2))) {
+    return null;
+  }
+  if (uncMatch) {
+    const server = uncMatch[1].toLocaleLowerCase("en-US");
+    const share = uncMatch[2].toLocaleLowerCase("en-US");
+    if ([".", "..", "?", "globalroot", "device"].includes(server) || share === "." || share === "..") {
+      return null;
+    }
+  }
+  const normalized = win32.normalize(candidate);
+  if (/^[A-Za-z]:\\/.test(normalized)) {
+    return normalized;
+  }
+  if (/^\\\\[^\\]+\\[^\\]+(?:\\.*)?$/.test(normalized)) {
+    return normalized;
+  }
+  return null;
+}
+
+export async function revealHistoryEntry(
+  request: HistoryRevealRequest,
+  dependencies: HistoryRevealDependencies
+): Promise<HistoryRevealResult> {
+  if (
+    typeof request.entryId !== "string"
+    || request.entryId.length === 0
+    || request.entryId.length > 256
+    || request.entryId.trim() !== request.entryId
+  ) {
+    return { ok: false, reason: "entry-not-found" };
+  }
+  const entries = await dependencies.loadHistory();
+  const entry = entries.find((candidate) => candidate.id === request.entryId);
+  if (!entry) {
+    return { ok: false, reason: "entry-not-found" };
+  }
+  const normalizedDirectory = normalizeHistoryDirectory(entry.outputDir);
+  if (!normalizedDirectory) {
+    return { ok: false, reason: "invalid-output-dir" };
+  }
+  let stat: HistoryRevealStat;
+  try {
+    stat = await dependencies.stat(normalizedDirectory);
+  } catch (error) {
+    const code = typeof error === "object" && error !== null && "code" in error
+      ? (error as { code?: unknown }).code
+      : undefined;
+    return { ok: false, reason: code === "ENOENT" || code === "ENOTDIR" ? "output-dir-missing" : "open-failed" };
+  }
+  if (!stat.isDirectory()) {
+    return { ok: false, reason: "output-dir-not-directory" };
+  }
+  try {
+    const error = await dependencies.openPath(normalizedDirectory);
+    return error === "" ? { ok: true } : { ok: false, reason: "open-failed" };
+  } catch {
+    return { ok: false, reason: "open-failed" };
+  }
+}

src/main/main.ts

@@ -10,6 +10,7 @@ import { sendNotification } from "./notify";
 import { APP_NAME } from "./constants";
 import { extractHttpLinksFromText } from "./utils";
 import { cleanupStaleSubstDrives, shutdownDaemon } from "./extractor";
+import { revealHistoryEntry } from "./history-reveal";
 
 function validateString(value: unknown, name: string): string {
   if (typeof value !== "string") {
@@ -510,6 +511,13 @@ function registerIpcHandlers(): void {
     validateString(entryId, "entryId");
     return controller.removeHistoryEntry(entryId);
   });
+  ipcMain.handle(IPC_CHANNELS.REVEAL_HISTORY_ENTRY, (_event: IpcMainInvokeEvent, entryId: unknown) => {
+    return revealHistoryEntry({ entryId }, {
+      loadHistory: () => controller.getHistory(),
+      stat: (directory) => fs.promises.stat(directory),
+      openPath: (directory) => shell.openPath(directory)
+    });
+  });
   ipcMain.handle(IPC_CHANNELS.EXPORT_QUEUE, async () => {
     const options = {
       defaultPath: `rd-queue-export.json`,

src/preload/preload.ts

@@ -9,6 +9,7 @@ import {
   DuplicatePolicy,
   EnableRemoteDiagnosticsInput,
   HistoryEntry,
+  HistoryRevealResult,
   PackagePriority,
   RemoteDiagnosticsInfo,
   RendererErrorReport,
@@ -95,6 +96,7 @@ const api: ElectronApi = {
   getHistory: (): Promise<HistoryEntry[]> => ipcRenderer.invoke(IPC_CHANNELS.GET_HISTORY),
   clearHistory: (): Promise<void> => ipcRenderer.invoke(IPC_CHANNELS.CLEAR_HISTORY),
   removeHistoryEntry: (entryId: string): Promise<void> => ipcRenderer.invoke(IPC_CHANNELS.REMOVE_HISTORY_ENTRY, entryId),
+  revealHistoryEntry: (entryId: string): Promise<HistoryRevealResult> => ipcRenderer.invoke(IPC_CHANNELS.REVEAL_HISTORY_ENTRY, entryId),
   setPackagePriority: (packageId: string, priority: PackagePriority): Promise<void> => ipcRenderer.invoke(IPC_CHANNELS.SET_PACKAGE_PRIORITY, packageId, priority),
   skipItems: (itemIds: string[]): Promise<void> => ipcRenderer.invoke(IPC_CHANNELS.SKIP_ITEMS, itemIds),
   resetItems: (itemIds: string[]): Promise<void> => ipcRenderer.invoke(IPC_CHANNELS.RESET_ITEMS, itemIds),

src/renderer/download-format.ts

@@ -0,0 +1,76 @@
+import type { AudioStripSummary, DebridProvider } from "../shared/types";
+
+export const providerLabels: Record<DebridProvider, string> = {
+  realdebrid: "Real-Debrid",
+  megadebrid: "Mega-Debrid",
+  "megadebrid-api": "Mega-Debrid API",
+  "megadebrid-web": "Mega-Debrid Web",
+  bestdebrid: "BestDebrid",
+  alldebrid: "AllDebrid",
+  ddownload: "DDownload",
+  onefichier: "1Fichier",
+  debridlink: "Debrid-Link",
+  linksnappy: "LinkSnappy"
+};
+
+export function compactProviderLabels(labels: string[]): string {
+  const groups = new Map<string, string[]>();
+  for (const label of [...new Set(labels)]) {
+    const match = label.match(/^(.+?)\s*\((.+)\)$/);
+    if (!match) {
+      groups.set(label, []);
+      continue;
+    }
+    const details = groups.get(match[1]) ?? [];
+    details.push(match[2]);
+    groups.set(match[1], details);
+  }
+  return [...groups].map(([base, details]) => details.length === 0 ? base : `${base} (${details.join(" + ")})`).join(", ");
+}
+
+export function formatDateTime(timestamp: number): string {
+  if (!timestamp) return "";
+  const date = new Date(timestamp);
+  const day = String(date.getDate()).padStart(2, "0");
+  const month = String(date.getMonth() + 1).padStart(2, "0");
+  const hours = String(date.getHours()).padStart(2, "0");
+  const minutes = String(date.getMinutes()).padStart(2, "0");
+  return `${day}.${month}.${date.getFullYear()} - ${hours}:${minutes}`;
+}
+
+export function extractHoster(url: string): string {
+  try {
+    const host = new URL(url).hostname.replace(/^www\./, "");
+    const parts = host.split(".");
+    return parts.length >= 2 ? parts[parts.length - 2] : host;
+  } catch {
+    return "";
+  }
+}
+
+export function formatAudioStripSummary(summary: AudioStripSummary): { text: string; tooltip: string; attention: boolean } {
+  const parts: string[] = [];
+  const ok = summary.remuxed + summary.keptSingle;
+  if (ok > 0) parts.push(`${ok} OK`);
+  if (summary.skippedNoGerman > 0) parts.push(`${summary.skippedNoGerman} ohne DE-Tag`);
+  if (summary.skippedNoTool > 0) parts.push("ffmpeg fehlt");
+  if (summary.failed > 0) parts.push(`${summary.failed} Fehler`);
+  return {
+    text: `Tonspur: ${parts.join(" · ") || "—"}`,
+    tooltip: summary.files.map((entry) => `${entry.name}: ${entry.action} (${entry.reason}${entry.languages ? `, Spuren: ${entry.languages}` : ""})`).join("\n"),
+    attention: summary.skippedNoGerman > 0 || summary.skippedNoTool > 0 || summary.failed > 0
+  };
+}
+
+export function formatSpeedMbps(speedBps: number): string {
+  return `${(Math.max(0, speedBps || 0) / (1024 * 1024)).toFixed(2)} MB/s`;
+}
+
+export function humanSize(bytes: number): string {
+  if (!Number.isFinite(bytes) || bytes < 0) return "0 B";
+  if (bytes < 1024) return `${bytes} B`;
+  if (bytes < 1024 ** 2) return `${(bytes / 1024).toFixed(1)} KB`;
+  if (bytes < 1024 ** 3) return `${(bytes / 1024 ** 2).toFixed(2)} MB`;
+  if (bytes < 1024 ** 4) return `${(bytes / 1024 ** 3).toFixed(2)} GB`;
+  return `${(bytes / 1024 ** 4).toFixed(3)} TB`;
+}

src/renderer/error-boundary.tsx

@@ -43,51 +43,35 @@ export class ErrorBoundary extends React.Component<ErrorBoundaryProps, ErrorBoun
     if (!this.state.hasError) {
       return this.props.children;
     }
-    const overlay: React.CSSProperties = {
-      position: "fixed",
-      inset: 0,
-      display: "flex",
-      flexDirection: "column",
-      alignItems: "center",
-      justifyContent: "center",
-      gap: 16,
-      padding: 32,
-      background: "#070b14",
-      color: "#e6edf6",
-      fontFamily: "Segoe UI, system-ui, sans-serif",
-      textAlign: "center"
-    };
-    const pre: React.CSSProperties = {
-      maxWidth: 640,
-      maxHeight: 200,
-      overflow: "auto",
-      padding: 12,
-      background: "#0d1422",
-      border: "1px solid #243049",
-      borderRadius: 6,
-      color: "#ff9a8c",
-      fontSize: 12,
-      whiteSpace: "pre-wrap",
-      textAlign: "left"
-    };
-    const button: React.CSSProperties = {
-      padding: "8px 20px",
-      background: "#2d5cff",
-      color: "#fff",
-      border: "none",
-      borderRadius: 6,
-      cursor: "pointer",
-      fontSize: 14
-    };
     return (
-      <div style={overlay}>
-        <h1 style={{ margin: 0, fontSize: 20 }}>Die Oberfläche hat einen Fehler ausgelöst</h1>
-        <p style={{ margin: 0, maxWidth: 560, color: "#9aa7bd" }}>
-          Die Anzeige wurde gestoppt, um Datenverlust zu vermeiden. Die laufenden Downloads im
-          Hintergrund sind nicht betroffen. Der Fehler wurde ins Log geschrieben.
-        </p>
-        <pre style={pre}>{this.state.message}</pre>
-        <button type="button" style={button} onClick={this.handleReload}>Oberfläche neu laden</button>
+      <div
+        className="ui-error-boundary"
+        role="alert"
+        aria-live="assertive"
+        aria-atomic="true"
+        aria-labelledby="renderer-error-title"
+        aria-describedby="renderer-error-description renderer-error-details"
+      >
+        <div className="ui-error-boundary-content">
+          <h1 className="ui-error-boundary-title" id="renderer-error-title">
+            Die Oberfläche hat einen Fehler ausgelöst
+          </h1>
+          <p className="ui-error-boundary-description" id="renderer-error-description">
+            Die Anzeige wurde gestoppt, um Datenverlust zu vermeiden. Die laufenden Downloads im
+            Hintergrund sind nicht betroffen. Der Fehler wurde ins Log geschrieben.
+          </p>
+          <pre className="ui-error-boundary-details" id="renderer-error-details" tabIndex={0}>
+            {this.state.message}
+          </pre>
+          <button
+            autoFocus
+            className="ui-error-boundary-reload"
+            type="button"
+            onClick={this.handleReload}
+          >
+            Oberfläche neu laden
+          </button>
+        </div>
       </div>
     );
   }

src/renderer/main.tsx

@@ -2,6 +2,7 @@ import React from "react";
 import { createRoot } from "react-dom/client";
 import { App } from "./App";
 import { ErrorBoundary } from "./error-boundary";
+import "./theme.css";
 import "./styles.css";
 
 // Forward otherwise-silent renderer failures (uncaught errors, unhandled promise

src/renderer/shell/AppHeader.tsx

@@ -0,0 +1,38 @@
+import type { ReactElement, ReactNode } from "react";
+import { Icon } from "../ui/Icon";
+import { buildMainNavigation, type MainView } from "./shell-model";
+
+export interface AppHeaderProps {
+  activeView: MainView;
+  onViewChange: (view: MainView) => void;
+  actions: ReactNode;
+}
+
+export function AppHeader({ activeView, onViewChange, actions }: AppHeaderProps): ReactElement {
+  const navigation = buildMainNavigation(activeView);
+
+  return (
+    <header className="md-shell-header" data-ui-region="header">
+      <div className="md-shell-brand">Multi-Debrid-Downloader</div>
+      <nav aria-label="Hauptnavigation" className="md-shell-navigation" role="tablist">
+        {navigation.map((item) => (
+          <button
+            aria-current={item.active ? "page" : undefined}
+            aria-selected={item.active}
+            className={`md-shell-navigation-item${item.active ? " is-active" : ""}`}
+            data-visual-active-view={item.active ? item.id : undefined}
+            key={item.id}
+            onClick={() => onViewChange(item.id)}
+            role="tab"
+            title={item.label}
+            type="button"
+          >
+            <Icon name={item.icon} size={18} />
+            <span>{item.label}</span>
+          </button>
+        ))}
+      </nav>
+      {actions ? <div aria-label="Globale Aktionen" className="md-shell-header-actions" role="group">{actions}</div> : null}
+    </header>
+  );
+}

src/renderer/shell/AppShell.tsx

@@ -0,0 +1,106 @@
+import { useState, useSyncExternalStore, type ReactElement, type ReactNode } from "react";
+import { ContextInfoButton } from "../ui/ContextInfoButton";
+import { AppHeader } from "./AppHeader";
+import { AppSidebar } from "./AppSidebar";
+import {
+  getMainViewLabel,
+  getResponsiveShellMode,
+  type MainView,
+  type ResponsiveShellMode
+} from "./shell-model";
+import "./shell.css";
+
+function subscribeToViewport(callback: () => void): () => void {
+  if (typeof window === "undefined") {
+    return () => undefined;
+  }
+
+  window.addEventListener("resize", callback);
+  return () => window.removeEventListener("resize", callback);
+}
+
+function getViewportShellMode(): ResponsiveShellMode {
+  return typeof window === "undefined" ? "full" : getResponsiveShellMode(window.innerWidth);
+}
+
+function getServerShellMode(): ResponsiveShellMode {
+  return "full";
+}
+
+export interface AppShellProps {
+  activeView: MainView;
+  onViewChange: (view: MainView) => void;
+  sidebar: ReactNode;
+  sidebarStatus: ReactNode;
+  headerActions: ReactNode;
+  toolbar: ReactNode;
+  children: ReactNode;
+  footer: ReactNode;
+  contextInfo: ReactNode;
+  sidebarCollapsed: boolean;
+  onSidebarCollapsedChange: (collapsed: boolean) => void;
+}
+
+export function AppShell({
+  activeView,
+  onViewChange,
+  sidebar,
+  sidebarStatus,
+  headerActions,
+  toolbar,
+  children,
+  footer,
+  contextInfo,
+  sidebarCollapsed,
+  onSidebarCollapsedChange
+}: AppShellProps): ReactElement {
+  const [infoOpen, setInfoOpen] = useState(false);
+  const [responsiveSidebarExpanded, setResponsiveSidebarExpanded] = useState(false);
+  const responsiveMode = useSyncExternalStore(
+    subscribeToViewport,
+    getViewportShellMode,
+    getServerShellMode
+  );
+  const hasSidebar = Boolean(sidebar || sidebarStatus);
+  const responsiveSidebarCollapsed = responsiveMode !== "full" && !responsiveSidebarExpanded;
+  const effectiveSidebarCollapsed = sidebarCollapsed || responsiveSidebarCollapsed;
+
+  const setSidebarCollapsed = (collapsed: boolean): void => {
+    if (responsiveMode !== "full") {
+      setResponsiveSidebarExpanded(!collapsed);
+    }
+    onSidebarCollapsedChange(collapsed);
+  };
+
+  return (
+    <div
+      className={`md-shell is-${responsiveMode}${hasSidebar ? " has-sidebar" : ""}${hasSidebar && effectiveSidebarCollapsed ? " has-collapsed-sidebar" : ""}`}
+      data-responsive-mode={responsiveMode}
+    >
+      <AppHeader activeView={activeView} actions={headerActions} onViewChange={onViewChange} />
+      <div className="md-shell-workspace">
+        {hasSidebar ? (
+          <AppSidebar
+            collapsed={effectiveSidebarCollapsed}
+            onCollapsedChange={setSidebarCollapsed}
+            responsiveRail={responsiveSidebarCollapsed}
+            status={sidebarStatus}
+          >
+            {sidebar}
+          </AppSidebar>
+        ) : null}
+        <section className="md-shell-main" data-ui-region="main">
+          {toolbar ? <div className="md-shell-toolbar" data-ui-region="toolbar">{toolbar}</div> : null}
+          <div className="md-shell-content">{children}</div>
+          {footer ? <div className="md-shell-footer" data-ui-region="footer">{footer}</div> : null}
+          <ContextInfoButton
+            content={contextInfo}
+            contextName={getMainViewLabel(activeView)}
+            onOpenChange={setInfoOpen}
+            open={infoOpen}
+          />
+        </section>
+      </div>
+    </div>
+  );
+}

src/renderer/shell/AppSidebar.tsx

@@ -0,0 +1,37 @@
+import type { ReactElement, ReactNode } from "react";
+import { Icon } from "../ui/Icon";
+
+export interface AppSidebarProps {
+  children: ReactNode;
+  status: ReactNode;
+  collapsed: boolean;
+  responsiveRail?: boolean;
+  onCollapsedChange: (collapsed: boolean) => void;
+}
+
+export function AppSidebar({
+  children,
+  status,
+  collapsed,
+  responsiveRail = false,
+  onCollapsedChange
+}: AppSidebarProps): ReactElement {
+  return (
+    <aside
+      className={`md-shell-sidebar${collapsed ? " is-collapsed" : ""}${responsiveRail ? " is-responsive-rail" : ""}`}
+      data-ui-region="sidebar"
+    >
+      {children ? <div className="md-shell-sidebar-scroll">{children}</div> : null}
+      {status ? <div className="md-shell-sidebar-status" data-ui-region="sidebar-status">{status}</div> : null}
+      <button
+        aria-label={collapsed ? "Seitenleiste ausklappen" : "Seitenleiste einklappen"}
+        className="md-shell-sidebar-toggle"
+        onClick={() => onCollapsedChange(!collapsed)}
+        title={collapsed ? "Seitenleiste ausklappen" : "Seitenleiste einklappen"}
+        type="button"
+      >
+        <Icon name={collapsed ? "chevron-right" : "chevron-left"} size={14} />
+      </button>
+    </aside>
+  );
+}

src/renderer/shell/AvatarMenu.tsx

@@ -0,0 +1,119 @@
+import { useEffect, useRef, type ReactElement } from "react";
+import { restoreFocus } from "../ui/focus";
+
+export interface AvatarMenuAction {
+  id: string;
+  label: string;
+  danger?: boolean;
+  onSelect: () => void;
+}
+
+export interface AvatarMenuProps {
+  open: boolean;
+  accountLabel: string;
+  actions: AvatarMenuAction[];
+  onClose: () => void;
+}
+
+export type AvatarMenuKeyboardAction =
+  | { type: "close" }
+  | { type: "focus"; index: number };
+
+export function getAvatarMenuKeyboardAction(
+  key: string,
+  currentIndex: number,
+  itemCount: number
+): AvatarMenuKeyboardAction | null {
+  if (key === "Escape") {
+    return { type: "close" };
+  }
+  if (itemCount <= 0) {
+    return null;
+  }
+  if (key === "Home") {
+    return { type: "focus", index: 0 };
+  }
+  if (key === "End") {
+    return { type: "focus", index: itemCount - 1 };
+  }
+  if (key === "ArrowDown") {
+    return { type: "focus", index: (Math.max(currentIndex, -1) + 1) % itemCount };
+  }
+  if (key === "ArrowUp") {
+    return { type: "focus", index: currentIndex <= 0 ? itemCount - 1 : currentIndex - 1 };
+  }
+  return null;
+}
+
+export function AvatarMenu({ open, accountLabel, actions, onClose }: AvatarMenuProps): ReactElement | null {
+  const menuRef = useRef<HTMLDivElement>(null);
+  const itemRefs = useRef<Array<HTMLButtonElement | null>>([]);
+
+  const closeAndRestoreFocus = (): void => {
+    const trigger = menuRef.current?.parentElement?.querySelector<HTMLButtonElement>('button[aria-haspopup="menu"]');
+    onClose();
+    restoreFocus(trigger ?? null);
+  };
+
+  useEffect(() => {
+    if (!open) {
+      return;
+    }
+    const onPointerDown = (event: MouseEvent): void => {
+      if (!menuRef.current?.parentElement?.contains(event.target as Node)) {
+        onClose();
+      }
+    };
+    document.addEventListener("mousedown", onPointerDown);
+    return () => {
+      document.removeEventListener("mousedown", onPointerDown);
+    };
+  }, [onClose, open]);
+
+  if (!open) {
+    return null;
+  }
+
+  return (
+    <div
+      aria-label="Kontomenü"
+      className="md-avatar-menu"
+      onKeyDown={(event) => {
+        const currentIndex = itemRefs.current.findIndex((item) => item === document.activeElement);
+        const action = getAvatarMenuKeyboardAction(event.key, currentIndex, actions.length);
+        if (!action) {
+          return;
+        }
+        event.preventDefault();
+        event.stopPropagation();
+        if (action.type === "close") {
+          closeAndRestoreFocus();
+          return;
+        }
+        itemRefs.current[action.index]?.focus();
+      }}
+      ref={menuRef}
+      role="menu"
+    >
+      <div className="md-avatar-menu-account">{accountLabel}</div>
+      {actions.map((action, index) => (
+        <button
+          autoFocus={index === 0}
+          className={`md-avatar-menu-action${action.danger ? " is-danger" : ""}`}
+          key={action.id}
+          onClick={() => {
+            action.onSelect();
+            closeAndRestoreFocus();
+          }}
+          ref={(element) => {
+            itemRefs.current[index] = element;
+          }}
+          role="menuitem"
+          type="button"
+        >
+          {action.label}
+        </button>
+      ))}
+    </div>
+  );
+}

src/renderer/shell/OverlayHost.tsx

@@ -0,0 +1,60 @@
+import type { ReactElement, ReactNode } from "react";
+
+export interface OverlayHostProps {
+  confirm?: ReactNode;
+  onlineBackup?: ReactNode;
+  diagnostics?: ReactNode;
+  deleteConfirmation?: ReactNode;
+  conflict?: ReactNode;
+  accountCreate?: ReactNode;
+  accountEdit?: ReactNode;
+  keyStats?: ReactNode;
+  linkPopup?: ReactNode;
+  update?: ReactNode;
+  toast?: ReactNode;
+  accountContextMenu?: ReactNode;
+  downloadContextMenu?: ReactNode;
+  columnContextMenu?: ReactNode;
+  historyContextMenu?: ReactNode;
+  dropOverlay?: ReactNode;
+}
+
+export function OverlayHost({
+  confirm,
+  onlineBackup,
+  diagnostics,
+  deleteConfirmation,
+  conflict,
+  accountCreate,
+  accountEdit,
+  keyStats,
+  linkPopup,
+  update,
+  toast,
+  accountContextMenu,
+  downloadContextMenu,
+  columnContextMenu,
+  historyContextMenu,
+  dropOverlay
+}: OverlayHostProps): ReactElement {
+  return (
+    <div className="md-overlay-host" id="md-overlay-host">
+      {confirm}
+      {onlineBackup}
+      {diagnostics}
+      {deleteConfirmation}
+      {conflict}
+      {accountCreate}
+      {accountEdit}
+      {keyStats}
+      {linkPopup}
+      {update}
+      {toast}
+      {accountContextMenu}
+      {downloadContextMenu}
+      {columnContextMenu}
+      {historyContextMenu}
+      {dropOverlay}
+    </div>
+  );
+}

src/renderer/shell/UpdateExperience.tsx

@@ -0,0 +1,141 @@
+import { useState, type ReactElement } from "react";
+import type { UpdateInstallProgress } from "../../shared/types";
+import { Dialog } from "../ui/Dialog";
+
+export { getDialogFocusTarget as getUpdateDialogFocusTarget } from "../ui/Dialog";
+
+export type UpdateExperienceState = "prompt" | UpdateInstallProgress["stage"];
+
+export interface UpdateExperienceProgress {
+  percent: number | null;
+  text: string;
+}
+
+export interface UpdateExperienceProps {
+  available: boolean;
+  latestTag: string;
+  currentVersion: string;
+  releaseNotes: string;
+  state: UpdateExperienceState;
+  progress: UpdateExperienceProgress | number | null;
+  open: boolean;
+  onOpen: () => void;
+  onClose: () => void;
+  onInstall: () => void;
+  onLater: () => void;
+  renderTrigger?: boolean;
+  renderDialog?: boolean;
+}
+
+const activeStates = new Set<UpdateExperienceState>([
+  "starting",
+  "downloading",
+  "verifying",
+  "launching"
+]);
+
+export function UpdateExperience({
+  available,
+  latestTag,
+  currentVersion,
+  releaseNotes,
+  state,
+  progress,
+  open,
+  onOpen,
+  onClose,
+  onInstall,
+  onLater,
+  renderTrigger = true,
+  renderDialog = true
+}: UpdateExperienceProps): ReactElement | null {
+  const [tooltipOpen, setTooltipOpen] = useState(false);
+  const progressInfo = typeof progress === "object" ? progress : null;
+  const active = activeStates.has(state);
+  const closable = !active;
+
+  if (!available && !open) {
+    return null;
+  }
+
+  return (
+    <>
+      {available && renderTrigger ? (
+        <div
+          className="md-update-anchor"
+          onBlur={() => setTooltipOpen(false)}
+          onFocus={() => setTooltipOpen(true)}
+          onMouseEnter={() => setTooltipOpen(true)}
+          onMouseLeave={() => setTooltipOpen(false)}
+        >
+          <button
+            aria-describedby="md-update-tooltip"
+            aria-label="Update verfügbar"
+            className="md-update-trigger"
+            onClick={onOpen}
+            type="button"
+          >
+            Update verfügbar
+          </button>
+          <div
+            aria-label="Update verfügbar"
+            className={`md-update-tooltip${tooltipOpen ? " is-visible" : ""}`}
+            id="md-update-tooltip"
+            role="tooltip"
+          >
+            Eine neue Version ist bereit. Klicke hier, um sie zu installieren.
+          </div>
+        </div>
+      ) : null}
+      {renderDialog ? (
+        <Dialog
+          actions={state === "prompt" ? (
+            <>
+              <button className="btn" onClick={onLater} type="button">Später</button>
+              <button className="btn primary" onClick={onInstall} type="button">Jetzt aktualisieren</button>
+            </>
+          ) : null}
+          actionsClassName="md-update-dialog-actions"
+          backdropClassName="md-update-backdrop"
+          bodyClassName="md-update-dialog-body"
+          className={`md-update-dialog md-update-dialog-${state}`}
+          closable={closable}
+          headerClassName="md-update-dialog-header"
+          onClose={onClose}
+          open={open}
+          showCloseButton
+          size="update"
+          title="Update installieren"
+        >
+          {state === "prompt" ? (
+            <>
+              <p>{latestTag} ist verfügbar. Installierte Version: {currentVersion}.</p>
+              {releaseNotes.trim() ? (
+                <details className="md-update-release-notes">
+                  <summary>Changelog anzeigen</summary>
+                  <pre>{releaseNotes}</pre>
+                </details>
+              ) : null}
+            </>
+          ) : (
+            <>
+              <p className="md-update-progress-text">{progressInfo?.text ?? "Update wird vorbereitet..."}</p>
+              {state === "downloading" && progressInfo?.percent !== null && progressInfo?.percent !== undefined ? (
+                <div
+                  aria-label="Update-Fortschritt"
+                  aria-valuemax={100}
+                  aria-valuemin={0}
+                  aria-valuenow={progressInfo.percent}
+                  className="md-update-progress-track"
+                  role="progressbar"
+                >
+                  <div className="md-update-progress-fill" style={{ width: `${progressInfo.percent}%` }} />
+                </div>
+              ) : null}
+            </>
+          )}
+        </Dialog>
+      ) : null}
+    </>
+  );
+}

src/renderer/shell/shell-model.ts

@@ -0,0 +1,39 @@
+import type { IconName } from "../ui/Icon";
+
+export type MainView = "downloads" | "collector" | "settings" | "history" | "statistics";
+export type ResponsiveShellMode = "full" | "compact" | "minimum";
+
+export interface NavigationItem {
+  id: MainView;
+  label: string;
+  icon: IconName;
+  active: boolean;
+}
+
+const MAIN_NAVIGATION = [
+  { id: "downloads", label: "Downloads", icon: "download" },
+  { id: "collector", label: "Linksammler", icon: "collector" },
+  { id: "settings", label: "Einstellungen", icon: "settings" },
+  { id: "history", label: "Verlauf", icon: "history" },
+  { id: "statistics", label: "Statistiken", icon: "statistics" }
+] as const;
+
+export function buildMainNavigation(active: MainView): NavigationItem[] {
+  return MAIN_NAVIGATION.map((item) => ({ ...item, active: item.id === active }));
+}
+
+export function getMainViewLabel(view: MainView): string {
+  return MAIN_NAVIGATION.find((item) => item.id === view)?.label ?? view;
+}
+
+export function getResponsiveShellMode(width: number): ResponsiveShellMode {
+  if (width <= 1120) {
+    return "minimum";
+  }
+
+  if (width <= 1366) {
+    return "compact";
+  }
+
+  return "full";
+}

src/renderer/shell/shell.css

@@ -0,0 +1,822 @@
+.md-runtime-root {
+  --md-layer-avatar: 500;
+  --md-layer-menu: 600;
+  --md-layer-tooltip: 700;
+  --md-layer-toast: 800;
+  --md-layer-modal: 1000;
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.md-runtime-root.settings-active {
+  user-select: none;
+}
+
+.md-runtime-root.settings-active input:not([type="checkbox"]):not([type="radio"]):not([type="range"]),
+.md-runtime-root.settings-active textarea,
+.md-runtime-root.settings-active [contenteditable]:not([contenteditable="false"]) {
+  user-select: text;
+}
+
+.md-shell {
+  display: grid;
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  min-height: 0;
+  grid-template-rows: 40px minmax(0, 1fr);
+  gap: 8px;
+  padding: 8px 16px 16px;
+  overflow: hidden;
+  background: var(--ui-canvas);
+  color: var(--ui-text);
+}
+
+.md-shell-header {
+  position: relative;
+  display: flex;
+  min-width: 0;
+  height: 40px;
+  align-items: center;
+  gap: 12px;
+  border: 1px solid var(--ui-border);
+  border-radius: 8px;
+  background: var(--ui-surface);
+}
+
+.md-shell-brand {
+  flex: 0 0 auto;
+  padding: 0 16px;
+  color: var(--ui-text);
+  font-size: 16px;
+  font-weight: 700;
+  line-height: 20px;
+}
+
+.md-shell-navigation {
+  display: flex;
+  min-width: 0;
+  flex: 1 1 auto;
+  height: 100%;
+  align-items: center;
+  gap: 2px;
+  overflow: hidden;
+}
+
+.md-shell-navigation-item {
+  display: inline-flex;
+  height: 32px;
+  padding: 0 10px;
+  align-items: center;
+  gap: 8px;
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+  font-weight: 600;
+}
+
+.md-shell-navigation-item:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.md-shell-navigation-item.is-active {
+  background: var(--ui-active);
+  color: var(--ui-text);
+}
+
+.md-shell-navigation-item:focus-visible,
+.md-shell-header-actions button:focus-visible,
+.md-shell-sidebar-toggle:focus-visible,
+.md-avatar-menu-action:focus-visible {
+  outline: 2px solid var(--ui-accent);
+  outline-offset: 2px;
+}
+
+.md-shell-header-actions {
+  position: relative;
+  display: flex;
+  min-width: 0;
+  flex: 0 0 auto;
+  height: 100%;
+  margin-left: auto;
+  align-items: center;
+  gap: 4px;
+  padding-right: 6px;
+}
+
+.md-update-anchor {
+  position: relative;
+  display: flex;
+  height: 100%;
+  align-items: center;
+}
+
+.md-update-trigger {
+  display: inline-flex;
+  height: 40px;
+  min-width: 90px;
+  padding: 0 14px;
+  align-items: center;
+  justify-content: center;
+  border: 0;
+  border-radius: 6px;
+  background: var(--ui-primary);
+  color: #0f0f0f;
+  cursor: pointer;
+  font-size: 14px;
+  font-weight: 600;
+  line-height: 20px;
+  white-space: nowrap;
+}
+
+.md-update-trigger:hover {
+  background: var(--ui-primary-hover);
+}
+
+.md-update-trigger:focus-visible,
+.md-update-dialog button:focus-visible,
+.md-update-release-notes summary:focus-visible {
+  outline: 2px solid var(--ui-accent);
+  outline-offset: 2px;
+}
+
+.md-update-tooltip {
+  position: absolute;
+  top: calc(100% + 8px);
+  right: 0;
+  z-index: var(--md-layer-tooltip);
+  display: flex;
+  width: 200px;
+  min-height: 68px;
+  padding: 12px;
+  align-items: center;
+  box-sizing: border-box;
+  border-radius: 8px;
+  background: #4f4d4d;
+  box-shadow: 0 4px 12px rgb(0 0 0 / 35%);
+  color: #fff;
+  font-size: 12px;
+  line-height: 16px;
+  opacity: 0;
+  pointer-events: none;
+  visibility: hidden;
+}
+
+.md-update-anchor:hover .md-update-tooltip,
+.md-update-anchor:focus-within .md-update-tooltip,
+.md-update-tooltip.is-visible {
+  opacity: 1;
+  visibility: visible;
+}
+
+.md-update-backdrop {
+  position: fixed;
+  inset: 0;
+  z-index: 1300;
+  display: grid;
+  padding: 16px;
+  place-items: center;
+  background: rgb(0 0 0 / 60%);
+}
+
+.md-update-dialog {
+  display: grid;
+  width: min(548px, calc(100vw - 32px));
+  min-height: 207px;
+  max-height: calc(100vh - 32px);
+  grid-template-rows: 56px minmax(92px, auto) 58px;
+  overflow: auto;
+  transform: translateY(-24px);
+  border: 1px solid var(--ui-border);
+  border-radius: 16px;
+  background: var(--ui-surface);
+  box-shadow: 0 12px 40px rgb(0 0 0 / 45%);
+  color: var(--ui-text);
+}
+
+.md-update-dialog:not(.md-update-dialog-prompt) {
+  grid-template-rows: 56px minmax(150px, auto);
+}
+
+.md-update-dialog:focus {
+  outline: none;
+}
+
+.md-update-dialog-header {
+  display: flex;
+  min-width: 0;
+  height: 56px;
+  padding: 0 16px 0 20px;
+  align-items: center;
+  justify-content: space-between;
+  border-bottom: 1px solid var(--ui-border);
+}
+
+.md-update-dialog-header h2 {
+  margin: 0;
+  font-size: 20px;
+  font-weight: 600;
+  line-height: 28px;
+}
+
+.md-update-dialog-close {
+  display: grid;
+  width: 32px;
+  height: 32px;
+  padding: 0;
+  place-items: center;
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+  font-size: 24px;
+  line-height: 24px;
+}
+
+.md-update-dialog-close:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.md-update-dialog-body {
+  min-width: 0;
+  padding: 16px 20px;
+  overflow: auto;
+}
+
+.md-update-dialog-body p {
+  margin: 0;
+  color: var(--ui-text-secondary);
+  line-height: 20px;
+}
+
+.md-update-release-notes {
+  margin-top: 10px;
+  color: var(--ui-text-secondary);
+}
+
+.md-update-release-notes summary {
+  width: max-content;
+  cursor: pointer;
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 16px;
+}
+
+.md-update-release-notes pre {
+  margin: 10px 0 0;
+  color: var(--ui-text-secondary);
+  font: inherit;
+  line-height: 20px;
+  white-space: pre-wrap;
+}
+
+.md-update-dialog-actions {
+  display: flex;
+  min-height: 58px;
+  padding: 10px 16px;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 8px;
+  border-top: 1px solid var(--ui-border);
+}
+
+.md-update-progress-text {
+  min-height: 20px;
+}
+
+.md-update-progress-track {
+  height: 8px;
+  margin-top: 16px;
+  overflow: hidden;
+  border-radius: 999px;
+  background: var(--ui-input);
+}
+
+.md-update-progress-fill {
+  height: 100%;
+  border-radius: inherit;
+  background: var(--ui-accent);
+}
+
+.md-application-menu-tree {
+  display: flex;
+  height: 100%;
+  align-items: center;
+  user-select: none;
+}
+
+.md-application-menu-tree .menu-bar-trigger {
+  height: 32px;
+  padding: 0 8px;
+}
+
+.md-download-sidebar-content {
+  display: grid;
+  gap: 12px;
+}
+
+.md-download-sidebar-search {
+  display: grid;
+  gap: 4px;
+  color: var(--ui-text-secondary);
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 16px;
+}
+
+.md-download-sidebar-search input {
+  width: 100%;
+}
+
+.md-download-sidebar-actions {
+  display: grid;
+  gap: 4px;
+}
+
+.md-download-sidebar-actions .btn {
+  width: 100%;
+  text-align: left;
+}
+
+.md-runtime-view-content {
+  display: flex;
+  height: 100%;
+  min-width: 0;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.md-runtime-view-content > * {
+  width: 100%;
+  min-width: 0;
+  min-height: 0;
+}
+
+.md-shell-workspace {
+  display: grid;
+  min-width: 0;
+  min-height: 0;
+  grid-template-columns: minmax(0, 1fr);
+  gap: 8px;
+}
+
+.md-shell.has-sidebar .md-shell-workspace {
+  grid-template-columns: 270px minmax(0, 1fr);
+}
+
+.md-shell.has-collapsed-sidebar .md-shell-workspace {
+  grid-template-columns: 56px minmax(0, 1fr);
+}
+
+.md-shell-sidebar,
+.md-shell-main {
+  position: relative;
+  min-width: 0;
+  min-height: 0;
+  border: 1px solid var(--ui-border);
+  border-radius: 8px;
+  background: var(--ui-surface);
+}
+
+.md-shell-sidebar {
+  display: flex;
+  flex-direction: column;
+}
+
+.md-shell-sidebar-scroll {
+  min-height: 0;
+  flex: 1 1 auto;
+  overflow: auto;
+  padding: 12px;
+}
+
+.md-shell-sidebar-status {
+  display: grid;
+  flex: 0 0 auto;
+  gap: 4px;
+  padding: 12px;
+  border-top: 1px solid var(--ui-border);
+  color: var(--ui-text-secondary);
+  font-size: 12px;
+  line-height: 16px;
+}
+
+.md-shell-sidebar.is-collapsed :where(.md-shell-sidebar-scroll, .md-shell-sidebar-status) {
+  overflow: hidden;
+  visibility: hidden;
+}
+
+.md-shell-sidebar-toggle {
+  position: absolute;
+  top: 50%;
+  right: -8px;
+  z-index: 5;
+  display: grid;
+  width: 14px;
+  height: 42px;
+  padding: 0;
+  place-items: center;
+  transform: translateY(-50%);
+  border: 1px solid var(--ui-border);
+  border-radius: 4px;
+  background: var(--ui-input);
+  color: var(--ui-text-muted);
+  cursor: pointer;
+  opacity: 0;
+}
+
+.md-shell-sidebar.is-responsive-rail .md-shell-sidebar-toggle {
+  top: 12px;
+  right: auto;
+  left: 11px;
+  width: 32px;
+  height: 32px;
+  transform: none;
+  opacity: 1;
+}
+
+.md-shell-sidebar:hover .md-shell-sidebar-toggle,
+.md-shell-sidebar-toggle:focus-visible {
+  opacity: 1;
+}
+
+.md-shell-main {
+  display: flex;
+  overflow: hidden;
+  flex-direction: column;
+}
+
+.md-shell-toolbar {
+  min-width: 0;
+  flex: 0 0 auto;
+  overflow-x: auto;
+  overflow-y: hidden;
+}
+
+.md-shell-content {
+  min-width: 0;
+  min-height: 0;
+  flex: 1 1 auto;
+  overflow: hidden;
+}
+
+.md-shell-footer {
+  flex: 0 0 auto;
+  border-top: 1px solid var(--ui-border);
+}
+
+.md-avatar-anchor {
+  position: relative;
+}
+
+.md-avatar-trigger {
+  display: grid;
+  width: 32px;
+  height: 32px;
+  padding: 0;
+  place-items: center;
+  border: 0;
+  border-radius: 50%;
+  background: var(--ui-active);
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+}
+
+.md-avatar-menu {
+  position: absolute;
+  top: calc(100% + 5px);
+  right: 0;
+  z-index: var(--md-layer-avatar);
+  display: flex;
+  width: 174px;
+  min-height: 106px;
+  padding: 8px;
+  flex-direction: column;
+  border: 1px solid var(--ui-border);
+  border-radius: 8px;
+  background: var(--ui-surface);
+}
+
+.md-avatar-menu-account {
+  overflow: hidden;
+  padding: 4px 8px 8px;
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  line-height: 16px;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.md-avatar-menu-action {
+  min-height: 30px;
+  padding: 5px 8px;
+  border: 0;
+  border-radius: 4px;
+  background: transparent;
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+  text-align: left;
+}
+
+.md-avatar-menu-action:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.md-avatar-menu-action.is-danger {
+  color: var(--ui-danger);
+}
+
+.md-application-menu-tree :where(.menu-dropdown, .menu-submenu-dropdown) {
+  z-index: var(--md-layer-menu);
+}
+
+.md-overlay-host {
+  position: static;
+}
+
+.md-dialog-backdrop {
+  position: fixed;
+  inset: 0;
+  z-index: var(--md-layer-modal);
+  display: grid;
+  padding: 20px;
+  place-items: center;
+  background: var(--ui-overlay);
+}
+
+.md-dialog {
+  display: grid;
+  width: min(560px, calc(100vw - 40px));
+  max-height: calc(100vh - 40px);
+  grid-template-rows: auto minmax(0, 1fr) auto;
+  gap: 0;
+  overflow: hidden;
+  padding: 0;
+  border: 1px solid var(--ui-border);
+  border-radius: 16px;
+  outline: none;
+  background: var(--ui-surface);
+  box-shadow: 0 12px 40px rgb(0 0 0 / 45%);
+  color: var(--ui-text);
+}
+
+.md-dialog.md-dialog-size-account {
+  width: min(660px, calc(100vw - 40px));
+}
+
+.md-dialog.md-dialog-size-wide {
+  width: min(760px, calc(100vw - 40px));
+}
+
+.md-dialog.md-dialog-size-update {
+  width: min(548px, calc(100vw - 32px));
+}
+
+.md-dialog-header {
+  display: flex;
+  min-width: 0;
+  min-height: 56px;
+  padding: 12px 16px 12px 20px;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  border-bottom: 1px solid var(--ui-border);
+}
+
+.md-dialog-header h2 {
+  margin: 0;
+  color: var(--ui-text);
+  font-size: 20px;
+  font-weight: 600;
+  line-height: 28px;
+}
+
+.md-dialog-close {
+  display: grid;
+  width: 32px;
+  height: 32px;
+  flex: 0 0 auto;
+  padding: 0;
+  place-items: center;
+  border: 0;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+  font-size: 24px;
+  line-height: 24px;
+}
+
+.md-dialog-close:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.md-dialog-body {
+  min-width: 0;
+  min-height: 0;
+  overflow: auto;
+  padding: 16px 20px;
+}
+
+.md-dialog-body > :first-child {
+  margin-top: 0;
+}
+
+.md-dialog-body > :last-child {
+  margin-bottom: 0;
+}
+
+.md-dialog-description,
+.md-dialog-body p {
+  color: var(--ui-text-secondary);
+}
+
+.md-dialog-actions {
+  min-height: 58px;
+  padding: 10px 16px;
+  border-top: 1px solid var(--ui-border);
+  background: var(--ui-surface);
+}
+
+.md-dialog :where(button, summary, input, select, textarea):focus-visible,
+.md-context-menu [role="menuitem"]:focus-visible {
+  outline: 2px solid var(--ui-accent);
+  outline-offset: 2px;
+}
+
+.md-context-menu {
+  z-index: var(--md-layer-menu);
+  max-width: calc(100vw - 8px);
+  max-height: calc(100vh - 8px);
+  overflow: auto;
+  border-color: var(--ui-border);
+  background: var(--ui-surface);
+  box-shadow: 0 4px 12px rgb(0 0 0 / 35%);
+  color: var(--ui-text);
+}
+
+.md-context-menu .ctx-menu-item {
+  color: var(--ui-text);
+}
+
+.md-context-menu .ctx-menu-item:hover,
+.md-context-menu .ctx-menu-item:focus-visible {
+  background: var(--ui-hover);
+}
+
+.md-context-menu .ctx-menu-item.ctx-danger {
+  color: var(--ui-danger);
+}
+
+.md-context-menu .ctx-menu-sep {
+  background: var(--ui-border);
+}
+
+.md-context-menu .ctx-menu-sub.is-keyboard-open > .ctx-menu-sub-items {
+  display: block;
+}
+
+.md-toast {
+  right: 20px;
+  bottom: 84px;
+  z-index: var(--md-layer-toast);
+  max-width: min(420px, calc(100vw - 40px));
+  border-color: var(--ui-border);
+  background: var(--ui-surface);
+  color: var(--ui-text);
+  box-shadow: 0 4px 12px rgb(0 0 0 / 35%);
+}
+
+.md-drop-overlay {
+  z-index: var(--md-layer-modal);
+  pointer-events: none;
+  background: var(--ui-overlay);
+  border-color: color-mix(in srgb, var(--ui-accent) 72%, transparent);
+  color: var(--ui-text);
+}
+
+.md-overlay-host .md-dialog-backdrop {
+  z-index: var(--md-layer-modal);
+  padding: 20px;
+  background: var(--ui-overlay);
+}
+
+.md-overlay-host .md-dialog {
+  gap: 0;
+  overflow: hidden;
+  padding: 0;
+  border-color: var(--ui-border);
+  border-radius: 16px;
+  background: var(--ui-surface);
+  box-shadow: 0 12px 40px rgb(0 0 0 / 45%);
+  color: var(--ui-text);
+}
+
+.md-overlay-host .md-context-menu {
+  z-index: var(--md-layer-menu);
+  border-color: var(--ui-border);
+  background: var(--ui-surface);
+  box-shadow: 0 4px 12px rgb(0 0 0 / 35%);
+  color: var(--ui-text);
+}
+
+.md-overlay-host .md-toast {
+  bottom: 84px;
+  z-index: var(--md-layer-toast);
+  border-color: var(--ui-border);
+  background: var(--ui-surface);
+  box-shadow: 0 4px 12px rgb(0 0 0 / 35%);
+  color: var(--ui-text);
+}
+
+.md-overlay-host .md-drop-overlay {
+  z-index: var(--md-layer-modal);
+  pointer-events: none;
+  background: var(--ui-overlay);
+  color: var(--ui-text);
+}
+
+@media (max-width: 1366px) {
+  .md-shell.is-compact .md-shell-navigation-item span,
+  .md-shell.is-compact .md-shell-brand,
+  .md-shell.is-minimum .md-shell-navigation-item span,
+  .md-shell.is-minimum .md-shell-brand {
+    display: none;
+  }
+
+  .md-shell.is-compact .md-shell-header,
+  .md-shell.is-minimum .md-shell-header {
+    gap: 6px;
+  }
+
+  .md-shell.is-compact .md-shell-navigation,
+  .md-shell.is-minimum .md-shell-navigation {
+    flex: 1 1 auto;
+    overflow: hidden;
+  }
+
+  .md-shell.is-compact .md-shell-navigation-item,
+  .md-shell.is-minimum .md-shell-navigation-item {
+    width: 36px;
+    flex: 0 0 36px;
+    padding-inline: 9px;
+    justify-content: center;
+  }
+
+  .md-shell.is-compact .md-shell-header-actions,
+  .md-shell.is-minimum .md-shell-header-actions {
+    flex: 0 0 auto;
+  }
+}
+
+@media (max-width: 1120px) {
+  .md-shell.is-minimum {
+    gap: 6px;
+    padding: 6px 8px 8px;
+  }
+
+  .md-shell.is-minimum .md-shell-workspace {
+    gap: 6px;
+  }
+
+  .md-dialog-backdrop,
+  .md-overlay-host .md-dialog-backdrop,
+  .md-update-backdrop {
+    padding: 12px;
+  }
+
+  .md-dialog,
+  .md-dialog.md-dialog-size-account,
+  .md-dialog.md-dialog-size-wide,
+  .md-dialog.md-dialog-size-update,
+  .md-update-dialog {
+    max-width: 100%;
+    max-height: calc(100vh - 24px);
+  }
+
+  .md-dialog-actions,
+  .md-update-dialog-actions {
+    flex-wrap: wrap;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .md-shell *,
+  .md-shell *::before,
+  .md-shell *::after {
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+    scroll-behavior: auto !important;
+    transition-duration: 0.01ms !important;
+  }
+}

src/renderer/styles.css

@@ -933,27 +933,6 @@ body,
   padding: 7px 9px;
 }
 
-.collector-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  gap: 10px;
-  flex-wrap: wrap;
-}
-
-.collector-metrics {
-  color: var(--muted);
-  font-size: 13px;
-  font-variant-numeric: tabular-nums;
-}
-
-.collector-tabs {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-  flex-wrap: wrap;
-}
-
 .collector-tab {
   display: flex;
   align-items: center;
@@ -2221,8 +2200,7 @@ body,
   white-space: nowrap;
 }
 
-.account-picker-icon,
-.acct2-service-icon {
+.account-picker-icon {
   display: block;
   width: 18px;
   height: 18px;
@@ -2366,27 +2344,6 @@ body,
   padding: 6px 10px;
 }
 
-.queue-package-card {
-  border: 0;
-  border-radius: 0;
-  background: transparent;
-  padding: 0;
-  box-shadow: none;
-  border-bottom: 1px solid color-mix(in srgb, var(--border) 54%, transparent);
-}
-
-.queue-package-card.pkg-stripe-a {
-  background: color-mix(in srgb, var(--surface) 18%, transparent);
-}
-
-.queue-package-card.pkg-stripe-b {
-  background: color-mix(in srgb, var(--card) 24%, transparent);
-}
-
-.queue-package-card:hover {
-  background: color-mix(in srgb, var(--accent) 3%, transparent);
-}
-
 .package-card[draggable="true"] {
   cursor: grab;
 }
@@ -2404,12 +2361,6 @@ body,
   box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 30%, transparent);
 }
 
-.queue-package-card.pkg-selected {
-  border-color: transparent;
-  box-shadow: inset 2px 0 0 0 var(--accent);
-  background: color-mix(in srgb, var(--accent) 8%, transparent);
-}
-
 .item-selected {
   background: color-mix(in srgb, var(--accent) 12%, transparent);
 }
@@ -2421,11 +2372,6 @@ body,
   align-items: center;
 }
 
-.queue-package-card header {
-  min-height: 28px;
-  padding: 3px 10px;
-}
-
 .package-card h4 {
   margin: 0;
   font-size: 14px;
@@ -2460,15 +2406,6 @@ body,
   transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
 }
 
-.queue-package-card .pkg-toggle {
-  width: 16px;
-  height: 16px;
-  border-radius: 3px;
-  font-size: 12px;
-  background: transparent;
-  border-color: color-mix(in srgb, var(--border) 42%, transparent);
-}
-
 .pkg-toggle:hover {
   border-color: var(--accent);
   color: var(--text);
@@ -2516,13 +2453,6 @@ body,
   display: flex;
 }
 
-.queue-package-card .progress {
-  margin-top: 0;
-  height: 2px;
-  border-radius: 0;
-  background: color-mix(in srgb, var(--progress-track) 80%, transparent);
-}
-
 .progress-dl {
   height: 100%;
   background: linear-gradient(90deg, #f2942d, #ff7a5c);
@@ -2566,10 +2496,6 @@ body,
   margin-left: auto;
 }
 
-.history-card {
-  cursor: default;
-}
-
 .history-details {
   padding: 10px 12px;
   border-top: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
@@ -2642,16 +2568,6 @@ td {
   border-top: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
 }
 
-.queue-package-card .item-row {
-  margin: 0;
-  padding: 2px 10px 2px 10px;
-  border-top: 0;
-}
-
-.queue-package-card .item-row + .item-row {
-  border-top: 1px solid color-mix(in srgb, var(--border) 24%, transparent);
-}
-
 .item-row:hover {
   background: color-mix(in srgb, var(--accent) 5%, transparent);
 }
@@ -2780,16 +2696,6 @@ td {
   background: rgba(244, 63, 94, 0.1);
 }
 
-.statistics-view {
-  height: 100%;
-  overflow: auto;
-  display: grid;
-  grid-template-columns: 1fr 1fr;
-  grid-template-rows: auto 1fr;
-  gap: 10px;
-  min-height: 0;
-}
-
 .stats-overview {
   grid-column: span 2;
 }
@@ -2947,15 +2853,6 @@ td {
   flex-direction: column;
 }
 
-.provider-stats {
-  flex: 1;
-  overflow: auto;
-  display: flex;
-  flex-direction: column;
-  gap: 10px;
-  margin-top: 8px;
-}
-
 .provider-stat-item {
   display: flex;
   flex-direction: column;
@@ -3014,11 +2911,6 @@ td {
 }
 
 @media (max-width: 1100px) {
-  .statistics-view {
-    grid-template-columns: 1fr;
-    grid-template-rows: auto auto auto;
-  }
-
   .stats-overview {
     grid-column: span 1;
   }
@@ -3476,93 +3368,6 @@ td {
 }
 
 .account-board-header-actions { display: flex; gap: 8px; align-items: center; }
-.account-validity-badge {
-  display: inline-block;
-  margin-top: 4px;
-  padding: 2px 8px;
-  border-radius: 999px;
-  font-size: 11px;
-  font-weight: 600;
-  letter-spacing: 0.2px;
-  border: 1px solid transparent;
-  white-space: nowrap;
-}
-.account-validity-badge.ok { color: #10240f; background: #4fb96a; border-color: #3f9d57; }
-.account-validity-badge.free { color: #2a2113; background: #f2c14e; border-color: #d9a72f; }
-.account-validity-badge.invalid { color: #fff; background: #d9534f; border-color: #c0392b; }
-.account-validity-badge.unknown { color: var(--muted, #a59c8e); background: transparent; border-color: var(--line, #4a4032); }
-.account-validity-badge.disabled { color: var(--muted, #a59c8e); background: transparent; border-color: var(--border); opacity: 0.8; }
-
-.acct2-table {
-  display: block;
-  flex: 1;
-  min-height: 0;
-  border-bottom: 1px solid var(--border);
-  overflow: auto;
-}
-.acct2-head,
-.acct2-row {
-  display: grid;
-  grid-template-columns: 24px minmax(170px, 1.25fr) minmax(210px, 1.5fr) minmax(180px, 1.3fr) minmax(180px, 1.3fr) minmax(110px, 0.72fr) minmax(145px, 0.9fr) 30px;
-  align-items: center;
-  gap: 6px;
-  min-width: 1120px;
-  padding: 0 6px;
-}
-.acct2-head > span,
-.acct2-row > span {
-  min-width: 0;
-  overflow: hidden;
-  text-overflow: ellipsis;
-}
-.acct2-head > .acct2-c-actions,
-.acct2-row > .acct2-c-actions { overflow: visible; }
-.acct2-head {
-  position: sticky;
-  top: 0;
-  z-index: 2;
-  min-height: 25px;
-  background: color-mix(in srgb, var(--card) 60%, transparent);
-  border-bottom: 1px solid var(--border);
-  font-size: 9.5px;
-  font-weight: 700;
-  letter-spacing: 0.04em;
-  text-transform: uppercase;
-  color: var(--muted);
-}
-.acct2-row {
-  min-height: 28px;
-  border-bottom: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
-  font-size: 14px;
-  line-height: 1.2;
-  cursor: default;
-}
-.acct2-row:last-child { border-bottom: 0; }
-.acct2-row:hover { background: color-mix(in srgb, var(--button-bg-hover) 55%, transparent); }
-.acct2-row.selected { background: color-mix(in srgb, var(--accent) 15%, transparent); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent); }
-.acct2-row.acct2-problem { background: color-mix(in srgb, var(--danger) 15%, transparent); }
-.acct2-row.acct2-problem.selected { background: color-mix(in srgb, var(--danger) 20%, var(--accent) 8%); }
-.acct2-row.acct2-disabled { opacity: 0.55; }
-.acct2-body { min-width: 1120px; }
-.acct2-empty { display: grid; place-items: center; min-height: 160px; color: var(--muted); font-size: 11px; }
-.acct2-c-check { display: flex; justify-content: center; }
-.acct2-c-check input { cursor: pointer; }
-.acct2-c-actions { display: flex; gap: 6px; justify-content: flex-end; }
-.acct2-menu-button { width: 22px; min-width: 22px; height: 19px; padding: 0; font-size: 14px; line-height: 1; }
-.acct2-hoster { display: grid; grid-template-columns: 18px auto minmax(0, 1fr); align-items: center; gap: 6px; min-width: 0; }
-.acct2-hoster strong { overflow: hidden; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
-.acct2-mode { overflow: hidden; color: var(--muted); font-size: 12.5px; text-overflow: ellipsis; white-space: nowrap; }
-.acct2-traffic,
-.acct2-expiry { font-variant-numeric: tabular-nums; color: var(--muted); }
-.acct2-head > span:nth-child(4),
-.acct2-traffic { text-align: center; }
-.acct2-sortable { width: 100%; padding: 0; border: 0; color: inherit; background: transparent; font: inherit; letter-spacing: inherit; text-align: left; text-transform: inherit; cursor: pointer; user-select: none; }
-.acct2-sortable:hover { color: var(--text); }
-.acct2-user { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-.acct2-credential { color: var(--muted); white-space: nowrap; }
-.acct2-status .account-validity-badge { max-width: 100%; height: 20px; margin-top: 0; padding: 0 7px; overflow: hidden; font-size: 12px; line-height: 18px; text-overflow: ellipsis; white-space: nowrap; }
-.acct2-nostatus { color: var(--muted); opacity: 0.6; font-variant-numeric: tabular-nums; }
-
 .account-edit-modal {
   width: min(600px, calc(100vw - 36px));
   max-height: calc(100vh - 36px);

src/renderer/theme.css

@@ -0,0 +1,392 @@
+:root,
+:root[data-theme="dark"] {
+  --ui-canvas: #0F0F0F;
+  --ui-surface: #232323;
+  --ui-input: #2B2B2B;
+  --ui-table-header: #313131;
+  --ui-active: #333436;
+  --ui-hover: #373535;
+  --ui-tooltip: #4F4D4D;
+  --ui-border: #3D3D3D;
+  --ui-text: #FFFFFF;
+  --ui-text-secondary: #EAEDF3;
+  --ui-text-muted: #919191;
+  --ui-primary: #BAD0FC;
+  --ui-primary-hover: #8AA5DC;
+  --ui-accent: #3886FF;
+  --ui-warning: #F1C786;
+  --ui-danger: #F06464;
+  --ui-error-action-text: #181A1F;
+  --ui-modal-secondary: #35383D;
+  --ui-overlay: rgba(0, 0, 0, 0.60);
+  color-scheme: dark;
+}
+
+:root[data-theme="light"] {
+  --ui-canvas: #F3F4F6;
+  --ui-surface: #FFFFFF;
+  --ui-input: #F7F8FA;
+  --ui-table-header: #E7E9ED;
+  --ui-active: #DEE6F5;
+  --ui-hover: #E8ECF3;
+  --ui-tooltip: #35383D;
+  --ui-border: #D0D4DB;
+  --ui-text: #181A1F;
+  --ui-text-secondary: #343842;
+  --ui-text-muted: #667085;
+  --ui-primary: #A9C2F3;
+  --ui-primary-hover: #8AA5DC;
+  --ui-accent: #256FDB;
+  --ui-warning: #E8B85D;
+  --ui-danger: #D94747;
+  --ui-error-action-text: #181A1F;
+  --ui-modal-secondary: #E7E9ED;
+  --ui-overlay: rgba(0, 0, 0, 0.45);
+  color-scheme: light;
+}
+
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+html,
+body,
+#root {
+  min-width: 0;
+  min-height: 100%;
+}
+
+body {
+  margin: 0;
+  background: var(--ui-canvas);
+  color: var(--ui-text);
+  font-family: Inter, "Segoe UI Variable", "Segoe UI", sans-serif;
+  font-size: 14px;
+  font-weight: 400;
+  line-height: 20px;
+  text-rendering: optimizeLegibility;
+  user-select: none;
+}
+
+button,
+input,
+select,
+textarea {
+  font: inherit;
+}
+
+button {
+  color: inherit;
+}
+
+input,
+textarea,
+[contenteditable="true"] {
+  user-select: text;
+}
+
+* {
+  scrollbar-color: var(--ui-border) transparent;
+  scrollbar-width: thin;
+}
+
+*::-webkit-scrollbar {
+  width: 10px;
+  height: 10px;
+}
+
+*::-webkit-scrollbar-thumb {
+  border: 2px solid transparent;
+  border-radius: 999px;
+  background: var(--ui-border);
+  background-clip: padding-box;
+}
+
+*::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.ui-icon {
+  display: block;
+  flex: 0 0 auto;
+  pointer-events: none;
+}
+
+.ui-input {
+  min-width: 0;
+  height: 36px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  outline: none;
+  background: var(--ui-input);
+  color: var(--ui-text);
+}
+
+.ui-input::placeholder {
+  color: var(--ui-text-muted);
+  opacity: 1;
+}
+
+.ui-input:disabled {
+  cursor: not-allowed;
+  opacity: 0.55;
+}
+
+:where(
+  button,
+  [href],
+  input,
+  select,
+  textarea,
+  summary,
+  [tabindex]:not([tabindex="-1"])
+):focus-visible {
+  outline: 2px solid var(--ui-accent);
+  outline-offset: 2px;
+}
+
+.ui-toolbar {
+  display: flex;
+  min-width: 0;
+  min-height: 59px;
+  align-items: center;
+  gap: 8px;
+  padding: 11px 12px 12px;
+  border-bottom: 1px solid var(--ui-border);
+  background: var(--ui-surface);
+}
+
+.ui-toolbar-group {
+  display: flex;
+  min-width: 0;
+  align-items: center;
+  gap: 4px;
+}
+
+.ui-toolbar-search {
+  position: relative;
+  display: flex;
+  width: min(280px, 100%);
+  margin-left: auto;
+  align-items: center;
+}
+
+.ui-toolbar-search-icon {
+  position: absolute;
+  left: 10px;
+  color: var(--ui-text-muted);
+}
+
+.ui-toolbar-search-input {
+  width: 100%;
+  padding: 7px 12px 7px 34px;
+}
+
+.ui-data-table {
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  flex: 1 1 auto;
+  flex-direction: column;
+  overflow: hidden;
+  background: var(--ui-surface);
+  color: var(--ui-text);
+}
+
+.ui-data-table-header {
+  min-height: 41px;
+  flex: 0 0 41px;
+  border-bottom: 1px solid var(--ui-border);
+  background: var(--ui-table-header);
+  color: var(--ui-text-secondary);
+}
+
+.ui-data-table-body {
+  position: relative;
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  flex: 1 1 auto;
+  flex-direction: column;
+  overflow: auto;
+}
+
+.ui-data-table-empty {
+  display: flex;
+  min-height: 100%;
+  flex: 1 1 auto;
+}
+
+.ui-data-table-empty-cell {
+  display: flex;
+  max-width: 440px;
+  margin: auto;
+  align-items: center;
+  flex-direction: column;
+  gap: 8px;
+  padding: 32px 24px;
+  color: var(--ui-text-muted);
+  text-align: center;
+}
+
+.ui-data-table-empty-illustration {
+  display: grid;
+  width: 48px;
+  height: 48px;
+  margin-bottom: 4px;
+  place-items: center;
+  color: var(--ui-text-secondary);
+}
+
+.ui-data-table-empty-title {
+  color: var(--ui-text);
+  font-size: 18px;
+  font-weight: 600;
+  line-height: 24px;
+}
+
+.ui-data-table-empty-description {
+  color: var(--ui-text-muted);
+}
+
+.ui-data-table-footer {
+  display: flex;
+  min-height: 61px;
+  flex: 0 0 61px;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 24px;
+  padding: 0 16px;
+  border-top: 1px solid var(--ui-border);
+  background: var(--ui-surface);
+  color: var(--ui-text-secondary);
+  font-size: 12px;
+  line-height: 16px;
+}
+
+.ui-context-info {
+  position: absolute;
+  bottom: 16px;
+  left: 16px;
+  z-index: 20;
+  display: flex;
+  align-items: flex-end;
+  gap: 8px;
+}
+
+.ui-context-info-trigger {
+  display: inline-grid;
+  width: 32px;
+  height: 32px;
+  padding: 0;
+  place-items: center;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  background: var(--ui-surface);
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+}
+
+.ui-context-info-trigger:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.ui-context-info-region {
+  width: min(360px, calc(100vw - 80px));
+  max-height: min(320px, calc(100vh - 96px));
+  overflow: auto;
+  padding: 12px 16px;
+  border: 1px solid var(--ui-border);
+  border-radius: 8px;
+  background: var(--ui-tooltip);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
+  color: #FFFFFF;
+}
+
+.ui-error-boundary {
+  position: fixed;
+  inset: 0;
+  z-index: 10000;
+  overflow: auto;
+  padding: clamp(24px, 5vw, 48px);
+  background: var(--ui-canvas);
+  color: var(--ui-text);
+  text-align: center;
+}
+
+.ui-error-boundary-content {
+  display: flex;
+  width: min(640px, 100%);
+  min-height: 100%;
+  margin: auto;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 16px;
+}
+
+.ui-error-boundary-title {
+  margin: 0;
+  font-size: 20px;
+  font-weight: 600;
+  line-height: 28px;
+}
+
+.ui-error-boundary-description {
+  max-width: 560px;
+  margin: 0;
+  color: var(--ui-text-secondary);
+}
+
+.ui-error-boundary-details {
+  width: 100%;
+  max-height: min(200px, 40vh);
+  margin: 0;
+  overflow: auto;
+  padding: 12px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  background: var(--ui-input);
+  color: var(--ui-danger);
+  font-size: 12px;
+  line-height: 18px;
+  overflow-wrap: anywhere;
+  text-align: left;
+  user-select: text;
+  white-space: pre-wrap;
+}
+
+.ui-error-boundary-reload {
+  min-height: 40px;
+  padding: 8px 20px;
+  border: 0;
+  border-radius: 6px;
+  background: var(--ui-primary);
+  color: var(--ui-error-action-text);
+  cursor: pointer;
+  font-weight: 600;
+}
+
+.ui-error-boundary-reload:hover {
+  background: var(--ui-primary-hover);
+}
+
+.ui-error-boundary-details:focus-visible,
+.ui-error-boundary-reload:focus-visible {
+  outline: 2px solid var(--ui-accent);
+  outline-offset: 2px;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+    scroll-behavior: auto !important;
+    transition-duration: 0.01ms !important;
+  }
+}

src/renderer/ui/ContextInfoButton.tsx

@@ -0,0 +1,70 @@
+import { Children, Fragment, isValidElement, useId, type ReactElement, type ReactNode } from "react";
+import { Icon } from "./Icon";
+
+export interface ContextInfoButtonProps {
+  contextName: string;
+  content: ReactNode;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+}
+
+function hasRenderableContent(content: ReactNode): boolean {
+  if (content === null || content === undefined || typeof content === "boolean") {
+    return false;
+  }
+  if (typeof content === "string") {
+    return content.trim().length > 0;
+  }
+  if (typeof content === "number") {
+    return true;
+  }
+  if (Array.isArray(content)) {
+    return content.some(hasRenderableContent);
+  }
+  if (isValidElement<{ children?: ReactNode }>(content) && content.type === Fragment) {
+    return hasRenderableContent(content.props.children);
+  }
+  if (isValidElement(content)) {
+    return true;
+  }
+  return Children.toArray(content).some(hasRenderableContent);
+}
+
+export function ContextInfoButton({
+  contextName,
+  content,
+  open,
+  onOpenChange
+}: ContextInfoButtonProps): ReactElement | null {
+  const regionId = useId();
+
+  if (!hasRenderableContent(content)) {
+    return null;
+  }
+
+  return (
+    <div className="ui-context-info">
+      <button
+        aria-controls={regionId}
+        aria-expanded={open}
+        aria-label="Informationen"
+        className="ui-context-info-trigger"
+        onClick={() => onOpenChange(!open)}
+        title="Informationen"
+        type="button"
+      >
+        <Icon name="info" size={18} />
+      </button>
+      {open ? (
+        <div
+          aria-label={`Informationen zu ${contextName}`}
+          className="ui-context-info-region"
+          id={regionId}
+          role="region"
+        >
+          {content}
+        </div>
+      ) : null}
+    </div>
+  );
+}

src/renderer/ui/ContextMenu.tsx

@@ -0,0 +1,323 @@
+import {
+  Children,
+  cloneElement,
+  forwardRef,
+  isValidElement,
+  useEffect,
+  useImperativeHandle,
+  useLayoutEffect,
+  useRef,
+  useState,
+  type KeyboardEvent,
+  type ReactElement,
+  type ReactNode,
+  type RefObject
+} from "react";
+import { restoreFocus } from "./focus";
+
+const useImmediateEffect = typeof document === "undefined" ? useEffect : useLayoutEffect;
+
+export interface ContextMenuProps {
+  open: boolean;
+  x: number;
+  y: number;
+  onClose: () => void;
+  children: ReactNode;
+  ariaLabel?: string;
+  className?: string;
+  ignoreOutsideRefs?: Array<RefObject<HTMLElement>>;
+}
+
+export type ContextMenuKeyboardAction =
+  | { type: "focus"; index: number }
+  | { type: "activate"; index: number }
+  | { type: "close" };
+
+export type ContextMenuSubmenuKeyboardAction = "open" | "close";
+
+export function clampContextMenuPosition(
+  x: number,
+  y: number,
+  width: number,
+  height: number,
+  viewportWidth: number,
+  viewportHeight: number
+): { x: number; y: number } {
+  return {
+    x: Math.max(0, Math.min(x, Math.max(0, viewportWidth - width))),
+    y: Math.max(0, Math.min(y, Math.max(0, viewportHeight - height)))
+  };
+}
+
+export function getContextSubmenuPosition(
+  trigger: { left: number; right: number; top: number },
+  submenu: { width: number; height: number },
+  viewport: { width: number; height: number }
+): { x: number; y: number } {
+  const opensRight = trigger.right + submenu.width <= viewport.width || trigger.left - submenu.width < 0;
+  return clampContextMenuPosition(
+    opensRight ? trigger.right : trigger.left - submenu.width,
+    trigger.top,
+    submenu.width,
+    submenu.height,
+    viewport.width,
+    viewport.height
+  );
+}
+
+export function getContextMenuKeyboardAction(
+  key: string,
+  currentIndex: number,
+  enabled: boolean[]
+): ContextMenuKeyboardAction | null {
+  const indexes = enabled.flatMap((value, index) => value ? [index] : []);
+  if (key === "Escape") {
+    return { type: "close" };
+  }
+  if (indexes.length === 0) {
+    return null;
+  }
+  if (key === "Enter" || key === " ") {
+    return { type: "activate", index: enabled[currentIndex] ? currentIndex : indexes[0] };
+  }
+  if (key === "Home") {
+    return { type: "focus", index: indexes[0] };
+  }
+  if (key === "End") {
+    return { type: "focus", index: indexes[indexes.length - 1] };
+  }
+  if (key !== "ArrowDown" && key !== "ArrowUp") {
+    return null;
+  }
+  const enabledPosition = indexes.indexOf(currentIndex);
+  if (enabledPosition < 0) {
+    return { type: "focus", index: key === "ArrowDown" ? indexes[0] : indexes[indexes.length - 1] };
+  }
+  const direction = key === "ArrowDown" ? 1 : -1;
+  const nextPosition = (enabledPosition + direction + indexes.length) % indexes.length;
+  return { type: "focus", index: indexes[nextPosition] };
+}
+
+export function getContextMenuSubmenuKeyboardAction(
+  key: string,
+  hasSubmenu: boolean,
+  insideSubmenu: boolean
+): ContextMenuSubmenuKeyboardAction | null {
+  if (hasSubmenu && (key === "Enter" || key === "ArrowRight")) {
+    return "open";
+  }
+  if (insideSubmenu && (key === "ArrowLeft" || key === "Escape")) {
+    return "close";
+  }
+  return null;
+}
+
+function applyMenuItemSemantics(node: ReactNode): ReactNode {
+  return Children.map(node, (child) => {
+    if (!isValidElement(child)) {
+      return child;
+    }
+    const element = child as ReactElement<{
+      children?: ReactNode;
+      disabled?: boolean;
+      role?: string;
+      tabIndex?: number;
+    }>;
+    if (typeof element.type === "string" && element.type === "button") {
+      return cloneElement(element, { role: "menuitem", tabIndex: -1 });
+    }
+    if (element.props.children === undefined) {
+      return element;
+    }
+    return cloneElement(element, { children: applyMenuItemSemantics(element.props.children) });
+  });
+}
+
+function getMenuItems(menu: HTMLElement | null): HTMLElement[] {
+  return Array.from(menu?.querySelectorAll<HTMLElement>("[role='menuitem']") ?? []).filter((item) => {
+    if (item.matches(":disabled") || item.getAttribute("aria-disabled") === "true") {
+      return false;
+    }
+    return item.getClientRects().length > 0;
+  });
+}
+
+function getTopLevelMenuItems(menu: HTMLElement | null): HTMLElement[] {
+  return getMenuItems(menu).filter((item) => !item.closest(".ctx-menu-sub-items"));
+}
+
+function getSubmenuParts(item: HTMLElement | null): {
+  container: HTMLElement;
+  trigger: HTMLElement;
+  items: HTMLElement;
+} | null {
+  const container = item?.closest<HTMLElement>(".ctx-menu-sub") ?? null;
+  if (!container) {
+    return null;
+  }
+  const trigger = Array.from(container.children).find((child) => child.matches("[role='menuitem']"));
+  const items = Array.from(container.children).find((child) => child.matches(".ctx-menu-sub-items"));
+  if (!(trigger instanceof HTMLElement) || !(items instanceof HTMLElement)) {
+    return null;
+  }
+  return { container, trigger, items };
+}
+
+function openSubmenu(parts: ReturnType<typeof getSubmenuParts>): void {
+  if (!parts) {
+    return;
+  }
+  parts.container.classList.add("is-keyboard-open");
+  parts.trigger.setAttribute("aria-expanded", "true");
+  positionSubmenu(parts);
+  getMenuItems(parts.items)[0]?.focus();
+}
+
+function positionSubmenu(parts: NonNullable<ReturnType<typeof getSubmenuParts>>): void {
+  const triggerRect = parts.trigger.getBoundingClientRect();
+  const submenuRect = parts.items.getBoundingClientRect();
+  const position = getContextSubmenuPosition(
+    triggerRect,
+    submenuRect,
+    { width: window.innerWidth, height: window.innerHeight }
+  );
+  parts.items.style.position = "fixed";
+  parts.items.style.left = `${position.x}px`;
+  parts.items.style.top = `${position.y}px`;
+}
+
+function closeSubmenu(parts: ReturnType<typeof getSubmenuParts>): void {
+  if (!parts) {
+    return;
+  }
+  parts.container.classList.remove("is-keyboard-open");
+  parts.trigger.setAttribute("aria-expanded", "false");
+  parts.trigger.focus();
+}
+
+export const ContextMenu = forwardRef<HTMLDivElement, ContextMenuProps>(function ContextMenu({
+  open,
+  x,
+  y,
+  onClose,
+  children,
+  ariaLabel = "Kontextmenü",
+  className = "",
+  ignoreOutsideRefs = []
+}, forwardedRef): ReactElement | null {
+  const menuRef = useRef<HTMLDivElement>(null);
+  const previousFocusRef = useRef<HTMLElement | null>(null);
+  const onCloseRef = useRef(onClose);
+  const ignoreOutsideRefsRef = useRef(ignoreOutsideRefs);
+  const [position, setPosition] = useState({ x, y });
+  onCloseRef.current = onClose;
+  ignoreOutsideRefsRef.current = ignoreOutsideRefs;
+  useImperativeHandle(forwardedRef, () => menuRef.current as HTMLDivElement);
+
+  useImmediateEffect(() => {
+    if (!open || !menuRef.current) {
+      return;
+    }
+    if (!previousFocusRef.current) {
+      previousFocusRef.current = document.activeElement instanceof HTMLElement ? document.activeElement : null;
+    }
+    const rect = menuRef.current.getBoundingClientRect();
+    const next = clampContextMenuPosition(x, y, rect.width, rect.height, window.innerWidth, window.innerHeight);
+    setPosition((current) => current.x === next.x && current.y === next.y ? current : next);
+    getTopLevelMenuItems(menuRef.current)[0]?.focus();
+  }, [open, x, y]);
+
+  useEffect(() => {
+    if (!open) {
+      return;
+    }
+    const onOutside = (event: MouseEvent): void => {
+      const target = event.target;
+      if (!(target instanceof Node) || menuRef.current?.contains(target)) {
+        return;
+      }
+      if (ignoreOutsideRefsRef.current.some((ref) => ref.current?.contains(target))) {
+        return;
+      }
+      onCloseRef.current();
+    };
+    window.addEventListener("mousedown", onOutside);
+    window.addEventListener("contextmenu", onOutside);
+    return () => {
+      window.removeEventListener("mousedown", onOutside);
+      window.removeEventListener("contextmenu", onOutside);
+      const previousFocus = previousFocusRef.current;
+      previousFocusRef.current = null;
+      restoreFocus(previousFocus);
+    };
+  }, [open]);
+
+  if (!open) {
+    return null;
+  }
+
+  const onKeyDown = (event: KeyboardEvent<HTMLDivElement>): void => {
+    const activeItem = document.activeElement instanceof HTMLElement ? document.activeElement : null;
+    const submenu = getSubmenuParts(activeItem);
+    const insideSubmenu = Boolean(activeItem?.closest(".ctx-menu-sub-items"));
+    const hasSubmenu = submenu?.trigger === activeItem;
+    const submenuAction = getContextMenuSubmenuKeyboardAction(event.key, hasSubmenu, insideSubmenu);
+    if (submenuAction) {
+      event.preventDefault();
+      event.stopPropagation();
+      if (submenuAction === "open") {
+        openSubmenu(submenu);
+      } else {
+        closeSubmenu(submenu);
+      }
+      return;
+    }
+    const submenuItems = insideSubmenu ? activeItem?.closest<HTMLElement>(".ctx-menu-sub-items") ?? null : null;
+    const items = submenuItems ? getMenuItems(submenuItems) : getTopLevelMenuItems(menuRef.current);
+    const currentIndex = items.findIndex((item) => item === document.activeElement);
+    const action = getContextMenuKeyboardAction(event.key, currentIndex, items.map(() => true));
+    if (!action) {
+      return;
+    }
+    event.preventDefault();
+    event.stopPropagation();
+    if (action.type === "close") {
+      onClose();
+      return;
+    }
+    if (action.type === "activate") {
+      items[action.index]?.click();
+      return;
+    }
+    items[action.index]?.focus();
+  };
+
+  return (
+    <div
+      aria-label={ariaLabel}
+      className={["ctx-menu", "md-context-menu", className].filter(Boolean).join(" ")}
+      onClick={(event) => {
+        event.stopPropagation();
+        const item = event.target instanceof Element ? event.target.closest<HTMLElement>("[role='menuitem']") : null;
+        const submenu = getSubmenuParts(item);
+        if (submenu?.trigger === item) {
+          event.preventDefault();
+          openSubmenu(submenu);
+        }
+      }}
+      onKeyDown={onKeyDown}
+      onMouseOver={(event) => {
+        const item = event.target instanceof Element ? event.target.closest<HTMLElement>("[role='menuitem']") : null;
+        const submenu = getSubmenuParts(item);
+        if (submenu?.trigger === item) {
+          positionSubmenu(submenu);
+        }
+      }}
+      ref={menuRef}
+      role="menu"
+      style={{ left: position.x, top: position.y }}
+    >
+      {applyMenuItemSemantics(children)}
+    </div>
+  );
+});

src/renderer/ui/DataTable.tsx

@@ -0,0 +1,104 @@
+import type { HTMLAttributes, ReactElement, ReactNode } from "react";
+
+export interface DataTableProps extends HTMLAttributes<HTMLDivElement> {
+  label?: string;
+}
+
+export type DataTableSectionProps = HTMLAttributes<HTMLDivElement>;
+
+export interface DataTableEmptyProps extends HTMLAttributes<HTMLDivElement> {
+  title: string;
+  description?: string;
+  illustration?: ReactNode;
+}
+
+export interface DataTableFooterProps extends HTMLAttributes<HTMLDivElement> {
+  pageSize: number;
+  rangeLabel: string;
+  paginationVisible: boolean;
+}
+
+export function DataTable({ label = "Datentabelle", className, children, ...props }: DataTableProps): ReactElement {
+  return (
+    <div
+      {...props}
+      aria-label={label}
+      className={["ui-data-table", className].filter(Boolean).join(" ")}
+      role="table"
+    >
+      {children}
+    </div>
+  );
+}
+
+export function DataTableHeader({ className, children, ...props }: DataTableSectionProps): ReactElement {
+  return (
+    <div
+      {...props}
+      className={["ui-data-table-header", className].filter(Boolean).join(" ")}
+      data-ui-region="table-header"
+      role="rowgroup"
+    >
+      {children}
+    </div>
+  );
+}
+
+export function DataTableBody({ className, children, ...props }: DataTableSectionProps): ReactElement {
+  return (
+    <div
+      {...props}
+      className={["ui-data-table-body", className].filter(Boolean).join(" ")}
+      data-ui-region="table-body"
+      role="rowgroup"
+    >
+      {children}
+    </div>
+  );
+}
+
+export function DataTableEmpty({
+  title,
+  description,
+  illustration,
+  className,
+  ...props
+}: DataTableEmptyProps): ReactElement {
+  return (
+    <div
+      {...props}
+      className={["ui-data-table-empty", className].filter(Boolean).join(" ")}
+      role="row"
+    >
+      <div className="ui-data-table-empty-cell" role="cell">
+        {illustration ? <div className="ui-data-table-empty-illustration">{illustration}</div> : null}
+        <strong className="ui-data-table-empty-title">{title}</strong>
+        {description ? <span className="ui-data-table-empty-description">{description}</span> : null}
+      </div>
+    </div>
+  );
+}
+
+export function DataTableFooter({
+  pageSize,
+  rangeLabel,
+  paginationVisible,
+  className,
+  ...props
+}: DataTableFooterProps): ReactElement | null {
+  if (!paginationVisible) {
+    return null;
+  }
+
+  return (
+    <div
+      {...props}
+      aria-label="Seitennavigation"
+      className={["ui-data-table-footer", className].filter(Boolean).join(" ")}
+      role="navigation"
+    >
+      <span className="ui-data-table-page-size">{pageSize} pro Seite</span>
+      <span className="ui-data-table-range" aria-live="polite">{rangeLabel}</span>
+    </div>
+  );
+}

src/renderer/ui/Dialog.tsx

@@ -0,0 +1,271 @@
+import {
+  useCallback,
+  useEffect,
+  useId,
+  useLayoutEffect,
+  useRef,
+  type KeyboardEvent,
+  type ReactElement,
+  type ReactNode,
+  type RefObject
+} from "react";
+import { getConnectedFocusTarget, restoreFocus } from "./focus";
+
+const useImmediateEffect = typeof document === "undefined" ? useEffect : useLayoutEffect;
+const focusableSelector = "button:not([disabled]), summary, [href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex='-1'])";
+
+let activeDialogCount = 0;
+let blockedShells: Map<HTMLElement, { inert: boolean; ariaHidden: string | null }> | null = null;
+
+export type DialogSize = "default" | "account" | "update" | "wide";
+
+export interface DialogProps {
+  open: boolean;
+  title: string;
+  description?: ReactNode;
+  size?: DialogSize;
+  danger?: boolean;
+  initialFocusRef?: RefObject<HTMLElement>;
+  restoreFocusTarget?: HTMLElement | null;
+  restoreFocusFallback?: () => HTMLElement | null;
+  onClose: () => void;
+  children: ReactNode;
+  actions: ReactNode;
+  closable?: boolean;
+  showCloseButton?: boolean;
+  className?: string;
+  backdropClassName?: string;
+  headerClassName?: string;
+  bodyClassName?: string;
+  actionsClassName?: string;
+}
+
+export type DialogKeyboardAction = { type: "focus"; index: number } | { type: "close" };
+
+export function getDialogFocusTarget(shiftKey: boolean, currentIndex: number, itemCount: number): number | null {
+  if (itemCount <= 0) {
+    return null;
+  }
+  if (currentIndex < 0) {
+    return shiftKey ? itemCount - 1 : 0;
+  }
+  if (shiftKey && currentIndex === 0) {
+    return itemCount - 1;
+  }
+  if (!shiftKey && currentIndex === itemCount - 1) {
+    return 0;
+  }
+  return null;
+}
+
+export function getDialogInitialFocusTarget(
+  dialog: HTMLElement | null,
+  explicitTarget: HTMLElement | null,
+  activeTarget: HTMLElement | null = null
+): HTMLElement | null {
+  if (explicitTarget) {
+    return explicitTarget;
+  }
+  if (activeTarget && dialog?.contains(activeTarget)) {
+    return activeTarget;
+  }
+  return dialog?.querySelector<HTMLElement>("[autofocus]") ?? dialog;
+}
+
+export function getDialogRestoreFocusTarget(
+  dialog: HTMLElement | null,
+  activeTarget: HTMLElement | null
+): HTMLElement | null {
+  if (!activeTarget || dialog?.contains(activeTarget)) {
+    return null;
+  }
+  return activeTarget;
+}
+
+export function getConnectedDialogRestoreTarget(
+  previousTarget: HTMLElement | null,
+  fallbackTarget: HTMLElement | null
+): HTMLElement | null {
+  return getConnectedFocusTarget(previousTarget, fallbackTarget);
+}
+
+export function getDialogKeyboardAction(
+  key: string,
+  shiftKey: boolean,
+  currentIndex: number,
+  itemCount: number,
+  closable: boolean
+): DialogKeyboardAction | null {
+  if (key === "Escape") {
+    return closable ? { type: "close" } : null;
+  }
+  if (key !== "Tab" || itemCount <= 0) {
+    return null;
+  }
+  const target = getDialogFocusTarget(shiftKey, currentIndex, itemCount);
+  return target === null ? null : { type: "focus", index: target };
+}
+
+function blockShell(): () => void {
+  if (activeDialogCount === 0) {
+    blockedShells = new Map();
+    document.querySelectorAll<HTMLElement>(".md-shell").forEach((shell) => {
+      blockedShells?.set(shell, {
+        inert: shell.hasAttribute("inert"),
+        ariaHidden: shell.getAttribute("aria-hidden")
+      });
+      shell.setAttribute("inert", "");
+      shell.setAttribute("aria-hidden", "true");
+    });
+  }
+  activeDialogCount += 1;
+  let released = false;
+  return () => {
+    if (released) {
+      return;
+    }
+    released = true;
+    activeDialogCount = Math.max(0, activeDialogCount - 1);
+    if (activeDialogCount !== 0 || !blockedShells) {
+      return;
+    }
+    for (const [shell, state] of blockedShells) {
+      if (!state.inert) {
+        shell.removeAttribute("inert");
+      }
+      if (state.ariaHidden === null) {
+        shell.removeAttribute("aria-hidden");
+      } else {
+        shell.setAttribute("aria-hidden", state.ariaHidden);
+      }
+    }
+    blockedShells = null;
+  };
+}
+
+export function Dialog({
+  open,
+  title,
+  description,
+  size = "default",
+  danger = false,
+  initialFocusRef,
+  restoreFocusTarget,
+  restoreFocusFallback,
+  onClose,
+  children,
+  actions,
+  closable = true,
+  showCloseButton = false,
+  className = "",
+  backdropClassName = "",
+  headerClassName = "",
+  bodyClassName = "",
+  actionsClassName = ""
+}: DialogProps): ReactElement | null {
+  const dialogRef = useRef<HTMLDivElement>(null);
+  const backdropAttachedRef = useRef(false);
+  const previousFocusRef = useRef<HTMLElement | null>(null);
+  const restoreFocusFallbackRef = useRef<() => HTMLElement | null>(() => null);
+  const titleId = useId();
+  const descriptionId = useId();
+  restoreFocusFallbackRef.current = restoreFocusFallback ?? (() => null);
+
+  if (open && !previousFocusRef.current && restoreFocusTarget) {
+    previousFocusRef.current = getDialogRestoreFocusTarget(dialogRef.current, restoreFocusTarget);
+  }
+
+  const captureBackdropRef = useCallback((node: HTMLDivElement | null): void => {
+    if (node && !backdropAttachedRef.current && !previousFocusRef.current) {
+      const activeTarget = document.activeElement instanceof HTMLElement ? document.activeElement : null;
+      previousFocusRef.current = getDialogRestoreFocusTarget(dialogRef.current, activeTarget);
+    }
+    backdropAttachedRef.current = Boolean(node);
+  }, []);
+
+  useImmediateEffect(() => {
+    if (!open) {
+      return;
+    }
+    const releaseShell = blockShell();
+    const activeTarget = document.activeElement instanceof HTMLElement ? document.activeElement : null;
+    const focusTarget = getDialogInitialFocusTarget(dialogRef.current, initialFocusRef?.current ?? null, activeTarget);
+    focusTarget?.focus();
+    return () => {
+      releaseShell();
+      const previousFocus = previousFocusRef.current;
+      const fallbackFocus = restoreFocusFallbackRef.current();
+      previousFocusRef.current = null;
+      restoreFocus(previousFocus, fallbackFocus);
+    };
+  }, [initialFocusRef, open]);
+
+  if (!open) {
+    return null;
+  }
+
+  const onKeyDown = (event: KeyboardEvent<HTMLDivElement>): void => {
+    const focusable = Array.from(dialogRef.current?.querySelectorAll<HTMLElement>(focusableSelector) ?? []);
+    const currentIndex = focusable.findIndex((element) => element === document.activeElement);
+    const action = getDialogKeyboardAction(event.key, event.shiftKey, currentIndex, focusable.length, closable);
+    if (!action) {
+      if (event.key === "Tab" && focusable.length === 0) {
+        event.preventDefault();
+      }
+      return;
+    }
+    event.preventDefault();
+    event.stopPropagation();
+    if (action.type === "close") {
+      onClose();
+      return;
+    }
+    focusable[action.index]?.focus();
+  };
+
+  const dialogClasses = [
+    "modal-card",
+    "md-dialog",
+    `md-dialog-size-${size}`,
+    danger ? "is-danger" : "",
+    className
+  ].filter(Boolean).join(" ");
+
+  return (
+    <div
+      className={["modal-backdrop", "md-dialog-backdrop", backdropClassName].filter(Boolean).join(" ")}
+      onClick={() => {
+        if (closable) {
+          onClose();
+        }
+      }}
+      ref={captureBackdropRef}
+    >
+      <div
+        aria-describedby={description ? descriptionId : undefined}
+        aria-labelledby={titleId}
+        aria-modal="true"
+        className={dialogClasses}
+        onClick={(event) => event.stopPropagation()}
+        onKeyDown={onKeyDown}
+        ref={dialogRef}
+        role="dialog"
+        tabIndex={-1}
+      >
+        <div className={["md-dialog-header", headerClassName].filter(Boolean).join(" ")}>
+          <h2 id={titleId}>{title}</h2>
+          {showCloseButton && closable ? (
+            <button aria-label="Schließen" className="md-dialog-close" onClick={onClose} type="button">×</button>
+          ) : null}
+        </div>
+        <div className={["md-dialog-body", bodyClassName].filter(Boolean).join(" ")}>
+          {description ? <p className="md-dialog-description" id={descriptionId}>{description}</p> : null}
+          {children}
+        </div>
+        {actions ? (
+          <div className={["modal-actions", "md-dialog-actions", actionsClassName].filter(Boolean).join(" ")}>{actions}</div>
+        ) : null}
+      </div>
+    </div>
+  );
+}

src/renderer/ui/Icon.tsx

@@ -0,0 +1,129 @@
+import type { ReactElement, SVGProps } from "react";
+
+export const ICON_NAMES = [
+  "download",
+  "collector",
+  "settings",
+  "history",
+  "statistics",
+  "add",
+  "search",
+  "play",
+  "pause",
+  "stop",
+  "arrow-up",
+  "arrow-down",
+  "refresh",
+  "check",
+  "edit",
+  "trash",
+  "filter",
+  "folder",
+  "info",
+  "more",
+  "chevron-left",
+  "chevron-right",
+  "chevron-down",
+  "close",
+  "menu",
+  "help",
+  "backup",
+  "update",
+  "account"
+] as const;
+
+export type IconName = (typeof ICON_NAMES)[number];
+
+export interface IconProps extends Omit<SVGProps<SVGSVGElement>, "name"> {
+  name: IconName;
+  label?: string;
+  size?: number;
+}
+
+function IconDrawing({ name }: { name: IconName }): ReactElement {
+  switch (name) {
+    case "download":
+      return <><path d="M12 3v12" /><path d="m7 10 5 5 5-5" /><path d="M5 21h14" /></>;
+    case "collector":
+      return <><path d="M10 13a5 5 0 0 0 7.1.1l2-2a5 5 0 0 0-7.1-7.1l-1.1 1.1" /><path d="M14 11a5 5 0 0 0-7.1-.1l-2 2a5 5 0 0 0 7.1 7.1l1.1-1.1" /></>;
+    case "settings":
+      return <><circle cx="12" cy="12" r="3" /><path d="M19.4 15a1.7 1.7 0 0 0 .3 1.9l.1.1-2.8 2.8-.1-.1a1.7 1.7 0 0 0-1.9-.3 1.7 1.7 0 0 0-1 1.6v.2h-4V21a1.7 1.7 0 0 0-1-1.6 1.7 1.7 0 0 0-1.9.3l-.1.1L4.2 17l.1-.1a1.7 1.7 0 0 0 .3-1.9A1.7 1.7 0 0 0 3 14H2.8v-4H3a1.7 1.7 0 0 0 1.6-1 1.7 1.7 0 0 0-.3-1.9L4.2 7 7 4.2l.1.1A1.7 1.7 0 0 0 9 4.6 1.7 1.7 0 0 0 10 3v-.2h4V3a1.7 1.7 0 0 0 1 1.6 1.7 1.7 0 0 0 1.9-.3l.1-.1L19.8 7l-.1.1a1.7 1.7 0 0 0-.3 1.9 1.7 1.7 0 0 0 1.6 1h.2v4H21a1.7 1.7 0 0 0-1.6 1Z" /></>;
+    case "history":
+      return <><path d="M3 12a9 9 0 1 0 3-6.7L3 8" /><path d="M3 3v5h5" /><path d="M12 7v5l3 2" /></>;
+    case "statistics":
+      return <><path d="M4 20V10" /><path d="M10 20V4" /><path d="M16 20v-7" /><path d="M22 20V7" /></>;
+    case "add":
+      return <><path d="M12 5v14" /><path d="M5 12h14" /></>;
+    case "search":
+      return <><circle cx="11" cy="11" r="7" /><path d="m20 20-4-4" /></>;
+    case "play":
+      return <path d="m8 5 11 7-11 7Z" />;
+    case "pause":
+      return <><path d="M9 5v14" /><path d="M15 5v14" /></>;
+    case "stop":
+      return <rect x="6" y="6" width="12" height="12" rx="1" />;
+    case "arrow-up":
+      return <><path d="m6 10 6-6 6 6" /><path d="M12 4v16" /></>;
+    case "arrow-down":
+      return <><path d="m6 14 6 6 6-6" /><path d="M12 20V4" /></>;
+    case "refresh":
+      return <><path d="M20 7v5h-5" /><path d="M4 17v-5h5" /><path d="M6.1 9a7 7 0 0 1 11.5-2L20 9" /><path d="m4 15 2.4 2a7 7 0 0 0 11.5-2" /></>;
+    case "check":
+      return <path d="m5 12 4 4L19 6" />;
+    case "edit":
+      return <><path d="M4 20h4L19 9l-4-4L4 16v4Z" /><path d="m13 7 4 4" /></>;
+    case "trash":
+      return <><path d="M4 7h16" /><path d="M9 7V4h6v3" /><path d="m6 7 1 14h10l1-14" /><path d="M10 11v6" /><path d="M14 11v6" /></>;
+    case "filter":
+      return <path d="M4 5h16l-6 7v6l-4 2v-8Z" />;
+    case "folder":
+      return <path d="M3 6h7l2 2h9v11H3Z" />;
+    case "info":
+      return <><circle cx="12" cy="12" r="9" /><path d="M12 11v6" /><path d="M12 7h.01" /></>;
+    case "more":
+      return <><circle cx="5" cy="12" r="1" fill="currentColor" stroke="none" /><circle cx="12" cy="12" r="1" fill="currentColor" stroke="none" /><circle cx="19" cy="12" r="1" fill="currentColor" stroke="none" /></>;
+    case "chevron-left":
+      return <path d="m15 18-6-6 6-6" />;
+    case "chevron-right":
+      return <path d="m9 18 6-6-6-6" />;
+    case "chevron-down":
+      return <path d="m6 9 6 6 6-6" />;
+    case "close":
+      return <><path d="m6 6 12 12" /><path d="M18 6 6 18" /></>;
+    case "menu":
+      return <><path d="M4 6h16" /><path d="M4 12h16" /><path d="M4 18h16" /></>;
+    case "help":
+      return <><circle cx="12" cy="12" r="9" /><path d="M9.8 9a2.4 2.4 0 1 1 3.7 2c-1 .6-1.5 1.1-1.5 2" /><path d="M12 17h.01" /></>;
+    case "backup":
+      return <><path d="M6 4h10l3 3v13H6Z" /><path d="M9 4v6h6V4" /><path d="M9 20v-6h6v6" /></>;
+    case "update":
+      return <><path d="M12 21a9 9 0 1 0-8.5-6" /><path d="M3 15v6h6" /><path d="M12 7v5l3 2" /></>;
+    case "account":
+      return <><circle cx="12" cy="8" r="4" /><path d="M4 21a8 8 0 0 1 16 0" /></>;
+  }
+}
+
+export function Icon({ name, label, size = 18, className, ...props }: IconProps): ReactElement {
+  const labelled = typeof label === "string" && label.trim().length > 0;
+
+  return (
+    <svg
+      {...props}
+      aria-hidden={labelled ? undefined : true}
+      aria-label={labelled ? label : undefined}
+      className={["ui-icon", className].filter(Boolean).join(" ")}
+      fill="none"
+      focusable="false"
+      height={size}
+      role={labelled ? "img" : undefined}
+      stroke="currentColor"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      strokeWidth="1.75"
+      viewBox="0 0 24 24"
+      width={size}
+    >
+      <IconDrawing name={name} />
+    </svg>
+  );
+}

src/renderer/ui/Toast.tsx

@@ -0,0 +1,12 @@
+import type { ReactElement } from "react";
+
+export interface ToastProps {
+  message: string;
+}
+
+export function Toast({ message }: ToastProps): ReactElement | null {
+  if (!message) {
+    return null;
+  }
+  return <div aria-live="polite" className="toast md-toast" role="status">{message}</div>;
+}

src/renderer/ui/Toolbar.tsx

@@ -0,0 +1,56 @@
+import type { ChangeEventHandler, HTMLAttributes, InputHTMLAttributes, ReactElement } from "react";
+import { Icon } from "./Icon";
+
+export interface ToolbarProps extends HTMLAttributes<HTMLDivElement> {
+  label: string;
+}
+
+export interface ToolbarGroupProps extends HTMLAttributes<HTMLDivElement> {
+  label: string;
+}
+
+export interface ToolbarSearchProps extends Omit<InputHTMLAttributes<HTMLInputElement>, "type" | "aria-label"> {
+  label: string;
+  onChange: ChangeEventHandler<HTMLInputElement>;
+}
+
+export function Toolbar({ label, className, children, ...props }: ToolbarProps): ReactElement {
+  return (
+    <div
+      {...props}
+      aria-label={label}
+      className={["ui-toolbar", className].filter(Boolean).join(" ")}
+      role="toolbar"
+    >
+      {children}
+    </div>
+  );
+}
+
+export function ToolbarGroup({ label, className, children, ...props }: ToolbarGroupProps): ReactElement {
+  return (
+    <div
+      {...props}
+      aria-label={label}
+      className={["ui-toolbar-group", className].filter(Boolean).join(" ")}
+      role="group"
+    >
+      {children}
+    </div>
+  );
+}
+
+export function ToolbarSearch({ label, className, placeholder, ...props }: ToolbarSearchProps): ReactElement {
+  return (
+    <label className="ui-toolbar-search">
+      <Icon className="ui-toolbar-search-icon" name="search" size={16} />
+      <input
+        {...props}
+        aria-label={label}
+        className={["ui-input", "ui-toolbar-search-input", className].filter(Boolean).join(" ")}
+        placeholder={placeholder ?? label}
+        type="search"
+      />
+    </label>
+  );
+}

src/renderer/ui/focus.ts

@@ -0,0 +1,22 @@
+export type FocusRestoreScheduler = (callback: () => void) => void;
+
+export function getConnectedFocusTarget(
+  preferredTarget: HTMLElement | null,
+  fallbackTarget: HTMLElement | null = null
+): HTMLElement | null {
+  if (preferredTarget?.isConnected) {
+    return preferredTarget;
+  }
+
+  return fallbackTarget?.isConnected ? fallbackTarget : null;
+}
+
+export function restoreFocus(
+  preferredTarget: HTMLElement | null,
+  fallbackTarget: HTMLElement | null = null,
+  schedule: FocusRestoreScheduler = queueMicrotask
+): void {
+  schedule(() => {
+    getConnectedFocusTarget(preferredTarget, fallbackTarget)?.focus();
+  });
+}

src/renderer/ui/theme.ts

@@ -0,0 +1,79 @@
+export type UiTheme = "dark" | "light";
+
+export const UI_THEME_VARIABLES = [
+  "--ui-canvas",
+  "--ui-surface",
+  "--ui-input",
+  "--ui-table-header",
+  "--ui-active",
+  "--ui-hover",
+  "--ui-tooltip",
+  "--ui-border",
+  "--ui-text",
+  "--ui-text-secondary",
+  "--ui-text-muted",
+  "--ui-primary",
+  "--ui-primary-hover",
+  "--ui-accent",
+  "--ui-warning",
+  "--ui-danger",
+  "--ui-modal-secondary",
+  "--ui-overlay"
+] as const;
+
+export type UiThemeVariable = (typeof UI_THEME_VARIABLES)[number];
+
+export const UI_FOCUS_RING_VARIABLE: UiThemeVariable = "--ui-accent";
+
+type UiThemeVariables = Readonly<Record<UiThemeVariable, string>>;
+
+const darkThemeVariables: UiThemeVariables = Object.freeze({
+  "--ui-canvas": "#0F0F0F",
+  "--ui-surface": "#232323",
+  "--ui-input": "#2B2B2B",
+  "--ui-table-header": "#313131",
+  "--ui-active": "#333436",
+  "--ui-hover": "#373535",
+  "--ui-tooltip": "#4F4D4D",
+  "--ui-border": "#3D3D3D",
+  "--ui-text": "#FFFFFF",
+  "--ui-text-secondary": "#EAEDF3",
+  "--ui-text-muted": "#919191",
+  "--ui-primary": "#BAD0FC",
+  "--ui-primary-hover": "#8AA5DC",
+  "--ui-accent": "#3886FF",
+  "--ui-warning": "#F1C786",
+  "--ui-danger": "#F06464",
+  "--ui-modal-secondary": "#35383D",
+  "--ui-overlay": "rgba(0, 0, 0, 0.60)"
+});
+
+const lightThemeVariables: UiThemeVariables = Object.freeze({
+  "--ui-canvas": "#F3F4F6",
+  "--ui-surface": "#FFFFFF",
+  "--ui-input": "#F7F8FA",
+  "--ui-table-header": "#E7E9ED",
+  "--ui-active": "#DEE6F5",
+  "--ui-hover": "#E8ECF3",
+  "--ui-tooltip": "#35383D",
+  "--ui-border": "#D0D4DB",
+  "--ui-text": "#181A1F",
+  "--ui-text-secondary": "#343842",
+  "--ui-text-muted": "#667085",
+  "--ui-primary": "#A9C2F3",
+  "--ui-primary-hover": "#8AA5DC",
+  "--ui-accent": "#256FDB",
+  "--ui-warning": "#E8B85D",
+  "--ui-danger": "#D94747",
+  "--ui-modal-secondary": "#E7E9ED",
+  "--ui-overlay": "rgba(0, 0, 0, 0.45)"
+});
+
+const themes: Readonly<Record<UiTheme, UiThemeVariables>> = Object.freeze({
+  dark: darkThemeVariables,
+  light: lightThemeVariables
+});
+
+export function getThemeVariables(theme: UiTheme): Readonly<Record<string, string>> {
+  return themes[theme];
+}

src/renderer/views/collector/CollectorView.tsx

@@ -0,0 +1,208 @@
+import type { ChangeEvent, ReactElement } from "react";
+import {
+  DataTable,
+  DataTableBody,
+  DataTableEmpty,
+  DataTableHeader
+} from "../../ui/DataTable";
+import { Dialog } from "../../ui/Dialog";
+import { Toolbar, ToolbarGroup, ToolbarSearch } from "../../ui/Toolbar";
+import type { CollectorViewModel } from "./collector-model";
+import "./collector.css";
+
+export interface CollectorViewActions {
+  onTabSelect: (tabId: string) => void;
+  onTabAdd: () => void;
+  onTabRemove: (tabId: string) => void;
+  onOpenInput: () => void;
+  onImportDlc: () => void;
+  onImportFile: () => void;
+  onExportQueue: () => void;
+  onSubmit: () => void;
+  onQueryChange: (value: string) => void;
+  onSelectionChange: (rowId: string) => void;
+  onRemoveSelected: () => void;
+}
+
+export type CollectorViewRegion = "all" | "sidebar" | "toolbar" | "content";
+
+export interface CollectorViewProps {
+  model: CollectorViewModel;
+  actions: CollectorViewActions;
+  region?: CollectorViewRegion;
+}
+
+export interface CollectorInputDialogProps {
+  open: boolean;
+  tabName: string;
+  value: string;
+  onChange: (value: string) => void;
+  onClose: () => void;
+  onCommit: () => void;
+}
+
+export function CollectorSidebar({ model, actions }: CollectorViewProps): ReactElement {
+  return (
+    <div aria-label="Sammlungen" className="collector-sidebar" data-visual-region="collector-sidebar">
+      <div className="collector-sidebar-heading">
+        <strong>Sammlungen</strong>
+        <span>{model.tabs.length}</span>
+      </div>
+      <div className="collector-sidebar-list">
+        {model.tabs.map((tab) => (
+          <div className={`collector-sidebar-item${tab.id === model.activeTabId ? " is-active" : ""}`} key={tab.id}>
+            <button
+              aria-current={tab.id === model.activeTabId ? "page" : undefined}
+              className="collector-sidebar-select"
+              onClick={() => actions.onTabSelect(tab.id)}
+              type="button"
+            >
+              <span>{tab.name}</span>
+              <span className="collector-sidebar-count">{tab.linkCount}</span>
+            </button>
+            {model.tabs.length > 1 ? (
+              <button
+                aria-label={`${tab.name} entfernen`}
+                className="collector-sidebar-remove"
+                onClick={() => actions.onTabRemove(tab.id)}
+                type="button"
+              >×</button>
+            ) : null}
+          </div>
+        ))}
+      </div>
+      <button className="collector-sidebar-add" onClick={actions.onTabAdd} type="button">Neue Sammlung</button>
+    </div>
+  );
+}
+
+export function CollectorToolbar({ model, actions }: CollectorViewProps): ReactElement {
+  return (
+    <Toolbar className="collector-toolbar" data-visual-region="collector-toolbar" label="Linksammler-Aktionen">
+      <ToolbarGroup label="Links erfassen">
+        <button className="collector-action collector-action-primary" disabled={model.busy} onClick={actions.onOpenInput} type="button">Links hinzufügen</button>
+        <button className="collector-action" disabled={model.busy} onClick={actions.onImportDlc} type="button">DLC importieren</button>
+        <button className="collector-action" disabled={model.busy} onClick={actions.onImportFile} type="button">Datei importieren</button>
+      </ToolbarGroup>
+      <ToolbarGroup label="Sammlung verarbeiten">
+        <button className="collector-action" disabled={model.busy} onClick={actions.onExportQueue} type="button">Queue exportieren</button>
+        <button className="collector-action" disabled={model.busy || model.tabs.length === 0} onClick={actions.onSubmit} type="button">An Downloads übergeben</button>
+        <button className="collector-action collector-action-danger" disabled={model.busy || model.selectedIds.length === 0} onClick={actions.onRemoveSelected} type="button">Auswahl entfernen</button>
+      </ToolbarGroup>
+      <ToolbarSearch
+        label="Links durchsuchen"
+        onChange={(event) => actions.onQueryChange(event.target.value)}
+        placeholder="Links durchsuchen"
+        value={model.query}
+      />
+    </Toolbar>
+  );
+}
+
+export function CollectorContent({ model, actions }: CollectorViewProps): ReactElement {
+  const selected = new Set(model.selectedIds);
+  return (
+    <section className="collector-content" aria-label="Gesammelte Links">
+      <DataTable className="collector-table" label="Gesammelte Links">
+        <DataTableHeader className="collector-table-header">
+          <div className="collector-table-header-row" role="row">
+            <span aria-label="Auswahl" className="collector-column-select" role="columnheader" />
+            <span role="columnheader">Sammlung</span>
+            <span role="columnheader">URL oder Rohzeile</span>
+            <span role="columnheader">Zeile</span>
+            <span role="columnheader">Status</span>
+          </div>
+        </DataTableHeader>
+        <DataTableBody className="collector-table-body" data-visual-region="collector-table-body">
+          {model.busy ? (
+            <DataTableEmpty title="Links werden verarbeitet" description="Die laufende Aktion wird abgeschlossen." />
+          ) : model.error ? (
+            <DataTableEmpty className="collector-table-error" title={model.error} description="Die lokale Sammlung bleibt unverändert." />
+          ) : model.empty ? (
+            <DataTableEmpty
+              data-visual-region="collector-empty-state"
+              description={model.query ? "Passe die Suche an oder lösche den Filter." : "Füge Links hinzu oder importiere eine vorhandene Liste."}
+              title={model.query ? "Keine passenden Links" : "Noch keine Links"}
+            />
+          ) : (
+            model.rows.map((row) => (
+              <div className={`collector-row${selected.has(row.id) ? " is-selected" : ""}`} key={row.id} role="row">
+                <span className="collector-column-select" role="cell">
+                  <input
+                    aria-label="Link auswählen"
+                    checked={selected.has(row.id)}
+                    onChange={() => actions.onSelectionChange(row.id)}
+                    type="checkbox"
+                  />
+                </span>
+                <span className="collector-row-source" role="cell">{row.tabName}</span>
+                <span className="collector-row-value" role="cell" title={row.value}>{row.value}</span>
+                <span className="collector-row-line" role="cell">{row.lineNumber}</span>
+                <span className="collector-row-status" role="cell">Lokal</span>
+              </div>
+            ))
+          )}
+        </DataTableBody>
+      </DataTable>
+    </section>
+  );
+}
+
+export function CollectorView({ model, actions, region = "all" }: CollectorViewProps): ReactElement {
+  if (region === "sidebar") {
+    return <CollectorSidebar actions={actions} model={model} />;
+  }
+  if (region === "toolbar") {
+    return <CollectorToolbar actions={actions} model={model} />;
+  }
+  if (region === "content") {
+    return <CollectorContent actions={actions} model={model} />;
+  }
+  return (
+    <div className="collector-view">
+      <CollectorSidebar actions={actions} model={model} />
+      <div className="collector-view-main">
+        <CollectorToolbar actions={actions} model={model} />
+        <CollectorContent actions={actions} model={model} />
+      </div>
+    </div>
+  );
+}
+
+export function CollectorInputDialog({
+  open,
+  tabName,
+  value,
+  onChange,
+  onClose,
+  onCommit
+}: CollectorInputDialogProps): ReactElement | null {
+  return (
+    <Dialog
+      actions={(
+        <>
+          <button className="collector-dialog-secondary" onClick={onClose} type="button">Abbrechen</button>
+          <button className="collector-dialog-primary" onClick={onCommit} type="button">Übernehmen</button>
+        </>
+      )}
+      description={`Links für ${tabName} lokal erfassen.`}
+      onClose={onClose}
+      open={open}
+      size="wide"
+      title="Links hinzufügen"
+    >
+      <label className="collector-input-label">
+        <span>Links</span>
+        <textarea
+          aria-label="Links"
+          autoFocus
+          className="collector-input"
+          onChange={(event: ChangeEvent<HTMLTextAreaElement>) => onChange(event.target.value)}
+          placeholder="Eine URL oder Rohzeile pro Zeile"
+          rows={12}
+          value={value}
+        />
+      </label>
+    </Dialog>
+  );
+}

src/renderer/views/collector/collector-model.ts

@@ -0,0 +1,88 @@
+export interface CollectorSourceTab {
+  id: string;
+  name: string;
+  text: string;
+}
+
+export interface CollectorTabSummary {
+  id: string;
+  name: string;
+  linkCount: number;
+}
+
+export interface CollectorRow {
+  id: string;
+  tabId: string;
+  tabName: string;
+  originalLineIndex: number;
+  lineNumber: number;
+  value: string;
+  linkCount: number;
+}
+
+export interface CollectorViewModel {
+  tabs: CollectorTabSummary[];
+  activeTabId: string;
+  rows: CollectorRow[];
+  busy: boolean;
+  query: string;
+  selectedIds: string[];
+  empty: boolean;
+  error: string;
+}
+
+function nonEmptyLines(tab: CollectorSourceTab): Array<{ originalLineIndex: number; value: string }> {
+  return tab.text
+    .split(/\r?\n/)
+    .map((value, originalLineIndex) => ({ originalLineIndex, value: value.trim() }))
+    .filter((line) => line.value.length > 0);
+}
+
+export function buildCollectorRows(
+  tabs: CollectorSourceTab[],
+  activeTabId: string = tabs[0]?.id ?? "",
+  query = ""
+): CollectorRow[] {
+  const activeTab = tabs.find((tab) => tab.id === activeTabId) ?? tabs[0];
+  if (!activeTab) {
+    return [];
+  }
+  const lines = nonEmptyLines(activeTab);
+  const normalizedQuery = query.trim().toLocaleLowerCase("de");
+  return lines
+    .filter((line) => !normalizedQuery || line.value.toLocaleLowerCase("de").includes(normalizedQuery))
+    .map((line) => ({
+      id: `${activeTab.id}:${line.originalLineIndex}`,
+      tabId: activeTab.id,
+      tabName: activeTab.name,
+      originalLineIndex: line.originalLineIndex,
+      lineNumber: line.originalLineIndex + 1,
+      value: line.value,
+      linkCount: lines.length
+    }));
+}
+
+export function buildCollectorViewModel(
+  tabs: CollectorSourceTab[],
+  activeTabId: string,
+  query: string,
+  busy: boolean,
+  selectedIds: string[],
+  error = ""
+): CollectorViewModel {
+  const rows = buildCollectorRows(tabs, activeTabId, query);
+  return {
+    tabs: tabs.map((tab) => ({
+      id: tab.id,
+      name: tab.name,
+      linkCount: nonEmptyLines(tab).length
+    })),
+    activeTabId,
+    rows,
+    busy,
+    query,
+    selectedIds,
+    empty: rows.length === 0,
+    error
+  };
+}

src/renderer/views/collector/collector.css

@@ -0,0 +1,309 @@
+.collector-view {
+  display: grid;
+  grid-template-columns: 270px minmax(0, 1fr);
+  min-width: 0;
+  min-height: 520px;
+  overflow: hidden;
+}
+
+.collector-view-main {
+  display: grid;
+  grid-template-rows: auto minmax(0, 1fr);
+  min-width: 0;
+}
+
+.collector-sidebar {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  min-width: 0;
+  padding: 12px;
+}
+
+.collector-sidebar-heading {
+  align-items: center;
+  color: var(--ui-text-secondary);
+  display: flex;
+  font-size: 13px;
+  justify-content: space-between;
+  min-height: 28px;
+}
+
+.collector-sidebar-heading span,
+.collector-sidebar-count {
+  color: var(--ui-text-muted);
+  font-variant-numeric: tabular-nums;
+}
+
+.collector-sidebar-list {
+  display: flex;
+  flex: 1;
+  flex-direction: column;
+  gap: 4px;
+  min-height: 0;
+  overflow-y: auto;
+}
+
+.collector-sidebar-item {
+  align-items: stretch;
+  border: 1px solid transparent;
+  border-radius: 6px;
+  display: flex;
+  min-height: 36px;
+}
+
+.collector-sidebar-item:hover {
+  background: var(--ui-hover);
+}
+
+.collector-sidebar-item.is-active {
+  background: var(--ui-active);
+  border-color: var(--ui-border);
+}
+
+.collector-sidebar-select,
+.collector-sidebar-remove,
+.collector-sidebar-add {
+  background: transparent;
+  border: 0;
+  color: var(--ui-text-secondary);
+  font: inherit;
+}
+
+.collector-sidebar-select {
+  align-items: center;
+  display: flex;
+  flex: 1;
+  gap: 8px;
+  justify-content: space-between;
+  min-width: 0;
+  padding: 0 8px;
+  text-align: left;
+}
+
+.collector-sidebar-select span:first-child {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.collector-sidebar-remove {
+  border-left: 1px solid var(--ui-border);
+  min-width: 32px;
+}
+
+.collector-sidebar-add {
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  min-height: 36px;
+  padding: 0 10px;
+  text-align: left;
+}
+
+.collector-sidebar-add:hover,
+.collector-sidebar-remove:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.collector-toolbar {
+  min-width: 0;
+  width: 100%;
+}
+
+.collector-action {
+  background: var(--ui-input);
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  color: var(--ui-text-secondary);
+  font: inherit;
+  height: 36px;
+  padding: 0 12px;
+  white-space: nowrap;
+}
+
+.collector-action:hover:not(:disabled) {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.collector-action-primary {
+  background: var(--ui-primary);
+  border-color: var(--ui-primary);
+  color: #181A1F;
+}
+
+.collector-action-primary:hover:not(:disabled) {
+  background: var(--ui-primary-hover);
+  color: #181A1F;
+}
+
+.collector-action-danger:not(:disabled) {
+  border-color: color-mix(in srgb, var(--ui-danger) 70%, var(--ui-border));
+  color: var(--ui-danger);
+}
+
+.collector-action:disabled {
+  cursor: default;
+  opacity: 0.45;
+}
+
+.collector-content {
+  display: flex;
+  height: 100%;
+  min-height: 0;
+  min-width: 0;
+  overflow: hidden;
+}
+
+.collector-table {
+  height: 100%;
+}
+
+.collector-table-header-row,
+.collector-row {
+  align-items: center;
+  display: grid;
+  grid-template-columns: 48px minmax(140px, 0.8fr) minmax(320px, 3fr) 90px 100px;
+  min-width: 760px;
+}
+
+.collector-table-header {
+  height: 41px;
+}
+
+.collector-table-header-row {
+  color: var(--ui-text-muted);
+  font-size: 11px;
+  font-weight: 700;
+  height: 41px;
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+}
+
+.collector-table-header-row > span,
+.collector-row > span {
+  min-width: 0;
+  padding: 0 12px;
+}
+
+.collector-table-body {
+  overflow: auto;
+}
+
+.collector-row {
+  border-bottom: 1px solid var(--ui-border);
+  color: var(--ui-text-secondary);
+  height: 48px;
+}
+
+.collector-row:hover {
+  background: var(--ui-hover);
+}
+
+.collector-row.is-selected {
+  background: var(--ui-active);
+}
+
+.collector-column-select {
+  display: grid;
+  place-items: center;
+}
+
+.collector-row-source {
+  font-weight: 600;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.collector-row-value {
+  color: var(--ui-text);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  user-select: text;
+  white-space: nowrap;
+}
+
+.collector-row-line,
+.collector-row-status {
+  color: var(--ui-text-muted);
+  font-variant-numeric: tabular-nums;
+}
+
+.collector-table-error .ui-data-table-empty-title {
+  color: var(--ui-danger);
+}
+
+.collector-input-label {
+  display: grid;
+  gap: 8px;
+}
+
+.collector-input-label > span {
+  color: var(--ui-text-secondary);
+  font-size: 13px;
+  font-weight: 600;
+}
+
+.collector-input {
+  background: var(--ui-input);
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  color: var(--ui-text);
+  font: inherit;
+  line-height: 1.5;
+  min-height: 240px;
+  padding: 12px;
+  resize: vertical;
+  user-select: text;
+  width: 100%;
+}
+
+.collector-dialog-primary,
+.collector-dialog-secondary {
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  font: inherit;
+  height: 36px;
+  padding: 0 14px;
+}
+
+.collector-dialog-primary {
+  background: var(--ui-primary);
+  border-color: var(--ui-primary);
+  color: #181A1F;
+}
+
+.collector-dialog-secondary {
+  background: var(--ui-modal-secondary);
+  color: var(--ui-text-secondary);
+}
+
+@media (max-width: 1366px) {
+  .collector-view {
+    grid-template-columns: 56px minmax(0, 1fr);
+  }
+
+  .collector-sidebar {
+    overflow: hidden;
+  }
+
+  .collector-action {
+    padding: 0 9px;
+  }
+
+  .collector-table-header-row,
+  .collector-row {
+    grid-template-columns: 44px minmax(120px, 0.7fr) minmax(280px, 2.4fr) 70px 86px;
+    min-width: 660px;
+  }
+}
+
+@media (max-width: 1120px) {
+  .collector-table-header-row,
+  .collector-row {
+    grid-template-columns: 44px minmax(108px, 0.7fr) minmax(250px, 2.2fr) 66px 82px;
+    min-width: 610px;
+  }
+}

src/renderer/views/downloads/DownloadsTable.tsx

@@ -0,0 +1,375 @@
+import { memo, type DragEvent, type KeyboardEvent as ReactKeyboardEvent, type MouseEvent as ReactMouseEvent, type ReactElement } from "react";
+import type { DownloadItem } from "../../../shared/types";
+import {
+  compactProviderLabels,
+  extractHoster,
+  formatAudioStripSummary,
+  formatDateTime,
+  formatSpeedMbps,
+  humanSize,
+  providerLabels
+} from "../../download-format";
+import type { DownloadPackageRow } from "./downloads-model";
+
+export type DownloadSortColumn = "name" | "size" | "hoster" | "progress";
+
+export const downloadColumnDefinitions: Record<string, { label: string; width: string; sortable?: DownloadSortColumn }> = {
+  name: { label: "Name", width: "minmax(0, 0.92fr)", sortable: "name" },
+  size: { label: "Geladen / Größe", width: "160px", sortable: "size" },
+  progress: { label: "Fortschritt", width: "80px", sortable: "progress" },
+  hoster: { label: "Hoster", width: "110px", sortable: "hoster" },
+  account: { label: "Service", width: "132px" },
+  prio: { label: "Priorität", width: "70px" },
+  status: { label: "Status", width: "160px" },
+  speed: { label: "Geschwindigkeit", width: "90px" },
+  added: { label: "Hinzugefügt am", width: "155px" }
+};
+
+export interface DownloadsTableActions {
+  onSetVisibleSelection: (ids: string[], selected: boolean) => void;
+  onToggleSelection: (id: string, ctrlKey: boolean, shiftKey: boolean) => void;
+  onSelectionMouseDown: (id: string, event: ReactMouseEvent) => void;
+  onSelectionMouseEnter: (id: string) => void;
+  onTogglePackage: (packageId: string) => void;
+  onTogglePackageCollapse: (packageId: string) => void;
+  onStartPackageRename: (packageId: string, packageName: string) => void;
+  onPackageRenameChange: (name: string) => void;
+  onCommitPackageRename: (packageId: string, value: string) => void;
+  onCancelPackageRename: (packageId: string) => void;
+  onCancelPackage: (packageId: string) => void;
+  onMovePackageUp: (packageId: string) => void;
+  onMovePackageDown: (packageId: string) => void;
+  onRemoveItem: (itemId: string) => void;
+  onOpenContextMenu: (id: string, x: number, y: number, packageId?: string) => void;
+  onColumnDragStart: (column: string, event: DragEvent<HTMLDivElement>) => void;
+  onColumnDragOver: (column: string, event: DragEvent<HTMLDivElement>) => void;
+  onColumnDragLeave: () => void;
+  onColumnDrop: (column: string, event: DragEvent<HTMLDivElement>) => void;
+  onColumnDragEnd: () => void;
+  onColumnContextMenu: (column: string, x: number, y: number) => void;
+  onSortColumn: (column: DownloadSortColumn) => void;
+}
+
+function displayedStatus(item: DownloadItem, sessionRunning: boolean): string {
+  const value = item.fullStatus.trim();
+  if (value === "Wartet") return "";
+  if (sessionRunning) return value;
+  if (item.status !== "queued" && item.status !== "reconnect_wait") return value;
+  if (value === "Paket gestoppt") return value;
+  if (/^Entpacken\b/i.test(value) || /^Entpackt\b/i.test(value) || /^Entpack-Fehler\b/i.test(value) || /^Fertig\b/i.test(value)) return value;
+  return "";
+}
+
+function progress(value: number): number {
+  return Math.max(0, Math.min(100, Math.round(value || 0)));
+}
+
+function itemCell(item: DownloadItem, column: string, sessionRunning: boolean): ReactElement | null {
+  const displayStatus = displayedStatus(item, sessionRunning);
+  const retrySuffix = item.retries > 0 ? ` (R${item.retries})` : "";
+  const error = item.lastError.trim();
+  const statusTitle = displayStatus
+    ? error && error !== displayStatus && !displayStatus.includes(error) ? `${displayStatus}${retrySuffix}\n${error}` : `${displayStatus}${retrySuffix}`
+    : error;
+  if (column === "name") {
+    return <span className="downloads-cell downloads-name-cell downloads-copyable" title={item.fileName}><span className={`downloads-link-state ${item.onlineStatus ?? "unknown"}`} />{item.fileName}</span>;
+  }
+  if (column === "size") {
+    const total = item.totalBytes || item.downloadedBytes || 0;
+    const value = total > 0 ? progress((item.downloadedBytes / total) * 100) : 0;
+    return <span className="downloads-cell downloads-size-cell">{total > 0 ? <span className="downloads-meter"><span style={{ width: `${value}%` }} /><b>{humanSize(item.downloadedBytes)} / {humanSize(total)}</b></span> : null}</span>;
+  }
+  if (column === "progress") {
+    const value = progress(item.progressPercent);
+    return <span className="downloads-cell downloads-progress-cell"><span className="downloads-meter"><span style={{ width: `${value}%` }} /><b>{value}%</b></span></span>;
+  }
+  if (column === "hoster") {
+    const hoster = extractHoster(item.url);
+    return <span className="downloads-cell" title={hoster}>{hoster}</span>;
+  }
+  if (column === "account") return <span className="downloads-cell">{item.providerLabel || (item.provider ? providerLabels[item.provider] : "")}</span>;
+  if (column === "prio") return <span className="downloads-cell" />;
+  if (column === "status") return <span className="downloads-cell" title={statusTitle}>{displayStatus}</span>;
+  if (column === "speed") return <span className="downloads-cell">{item.speedBps > 0 ? formatSpeedMbps(item.speedBps) : ""}</span>;
+  if (column === "added") return <span className="downloads-cell">{formatDateTime(item.createdAt)}</span>;
+  return null;
+}
+
+export interface ItemRowProps {
+  item: DownloadItem;
+  selected: boolean;
+  sessionRunning?: boolean;
+  columnOrder: readonly string[];
+  gridTemplate: string;
+  actions: DownloadsTableActions;
+}
+
+export function ItemRowContent({ item, selected, sessionRunning = true, columnOrder, gridTemplate, actions }: ItemRowProps): ReactElement {
+  return (
+    <div
+      className={`downloads-item-row${selected ? " is-selected" : ""}`}
+      data-download-row-id={item.id}
+      role="row"
+      style={{ gridTemplateColumns: `36px ${gridTemplate} 44px` }}
+      onClick={(event) => {
+        event.stopPropagation();
+        actions.onToggleSelection(item.id, event.ctrlKey || event.metaKey, event.shiftKey);
+      }}
+      onMouseDown={(event) => {
+        event.stopPropagation();
+        actions.onSelectionMouseDown(item.id, event);
+      }}
+      onMouseEnter={() => actions.onSelectionMouseEnter(item.id)}
+      onContextMenu={(event) => {
+        event.preventDefault();
+        event.stopPropagation();
+        actions.onOpenContextMenu(item.id, event.clientX, event.clientY, item.packageId);
+      }}
+    >
+      <span className="downloads-selection-cell" role="cell"><input aria-label={`${item.fileName} auswählen`} checked={selected} onChange={() => actions.onToggleSelection(item.id, true, false)} onClick={(event) => event.stopPropagation()} type="checkbox" /></span>
+      {columnOrder.map((column) => <span className="downloads-cell-slot" key={column} role="cell">{itemCell(item, column, sessionRunning)}</span>)}
+      <span className="downloads-action-cell" role="cell"><button aria-label={`${item.fileName} Aktionen`} onClick={(event) => { event.stopPropagation(); actions.onOpenContextMenu(item.id, event.clientX, event.clientY, item.packageId); }} type="button">⋮</button></span>
+    </div>
+  );
+}
+
+export function areItemRowPropsEqual(previous: ItemRowProps, next: ItemRowProps): boolean {
+  const a = previous.item;
+  const b = next.item;
+  return a.id === b.id
+    && a.updatedAt === b.updatedAt
+    && a.status === b.status
+    && a.fileName === b.fileName
+    && a.url === b.url
+    && a.provider === b.provider
+    && a.providerLabel === b.providerLabel
+    && a.providerAccountId === b.providerAccountId
+    && a.providerAccountLabel === b.providerAccountLabel
+    && a.fullStatus === b.fullStatus
+    && a.lastError === b.lastError
+    && a.onlineStatus === b.onlineStatus
+    && a.progressPercent === b.progressPercent
+    && a.speedBps === b.speedBps
+    && a.downloadedBytes === b.downloadedBytes
+    && a.totalBytes === b.totalBytes
+    && a.retries === b.retries
+    && a.createdAt === b.createdAt
+    && previous.selected === next.selected
+    && previous.sessionRunning === next.sessionRunning
+    && previous.columnOrder === next.columnOrder
+    && previous.gridTemplate === next.gridTemplate
+    && previous.actions === next.actions;
+}
+
+export const ItemRow = memo(ItemRowContent, areItemRowPropsEqual);
+
+function packageProgress(row: DownloadPackageRow): { done: number; failed: number; cancelled: number; total: number; value: number } {
+  let done = 0;
+  let failed = 0;
+  let cancelled = 0;
+  let extracted = 0;
+  let extracting = false;
+  let activeProgress = 0;
+  let extractingProgress = 0;
+  for (const item of row.items) {
+    if (item.status === "completed") done += 1;
+    else if (item.status === "failed") failed += 1;
+    else if (item.status === "cancelled") cancelled += 1;
+    const fullStatus = item.fullStatus || "";
+    if (fullStatus.startsWith("Entpackt")) {
+      extracted += 1;
+    } else if (fullStatus.startsWith("Entpacken")) {
+      extracting = true;
+      const match = fullStatus.match(/^Entpacken\s+(\d+)%/);
+      if (match) extractingProgress += Number(match[1]) / 100;
+    }
+    if (item.status === "downloading" || (item.status === "queued" && (item.progressPercent || 0) > 0)) {
+      activeProgress += (item.progressPercent || 0) / 100;
+    }
+  }
+  const total = Math.max(1, row.items.length);
+  const allDownloaded = done + failed + cancelled >= total;
+  const allExtracted = extracted >= total;
+  const useExtractSplit = extracting || row.package.status === "extracting" || (allDownloaded && !allExtracted && done > 0 && extracted > 0 && failed === 0 && cancelled === 0);
+  const downloadProgress = Math.min(useExtractSplit ? 50 : 100, Math.floor(((done + activeProgress) / total) * (useExtractSplit ? 50 : 100)));
+  const extractionProgress = Math.min(50, Math.floor(((extracted + extractingProgress) / total) * 50));
+  const value = Math.min(100, useExtractSplit ? downloadProgress + extractionProgress : downloadProgress);
+  return { done, failed, cancelled, total, value };
+}
+
+function packageCell(row: DownloadPackageRow, column: string, packageSpeedBps: number, editing: boolean, editingName: string, actions: DownloadsTableActions, finishRename: (value: string) => void): ReactElement | null {
+  const entry = row.package;
+  const stats = packageProgress(row);
+  if (column === "name") {
+    return (
+      <span className="downloads-cell downloads-name-cell">
+        <button aria-label={row.collapsed ? `${entry.name} ausklappen` : `${entry.name} einklappen`} className="downloads-collapse-button" onClick={(event) => { event.stopPropagation(); actions.onTogglePackageCollapse(entry.id); }} type="button">{row.collapsed ? "+" : "−"}</button>
+        <input aria-label={`${entry.name} aktivieren`} checked={entry.enabled} onChange={() => actions.onTogglePackage(entry.id)} onClick={(event) => event.stopPropagation()} type="checkbox" />
+        {editing
+          ? <input autoFocus className="downloads-rename-input" value={editingName} onBlur={() => finishRename(editingName)} onChange={(event) => actions.onPackageRenameChange(event.target.value)} onKeyDown={(event: ReactKeyboardEvent<HTMLInputElement>) => {
+            if (event.key === "Enter") {
+              event.preventDefault();
+              finishRename(editingName);
+              event.currentTarget.blur();
+            } else if (event.key === "Escape") {
+              event.preventDefault();
+              actions.onCancelPackageRename(entry.id);
+            }
+          }} />
+          : <strong className="downloads-copyable" onDoubleClick={(event) => { event.stopPropagation(); actions.onStartPackageRename(entry.id, entry.name); }} title={entry.name}>{entry.name}</strong>}
+      </span>
+    );
+  }
+  if (column === "size") {
+    const total = row.items.reduce((sum, item) => sum + (item.totalBytes || item.downloadedBytes || 0), 0);
+    const downloaded = row.items.reduce((sum, item) => sum + item.downloadedBytes, 0);
+    const value = total > 0 ? progress((downloaded / total) * 100) : 0;
+    return <span className="downloads-cell downloads-size-cell">{total > 0 ? <span className="downloads-meter"><span style={{ width: `${value}%` }} /><b>{humanSize(downloaded)} / {humanSize(total)}</b></span> : null}</span>;
+  }
+  if (column === "progress") return <span className="downloads-cell downloads-progress-cell"><span className="downloads-meter"><span style={{ width: `${stats.value}%` }} /><b>{stats.value}%</b></span></span>;
+  if (column === "hoster") {
+    const value = [...new Set(row.items.map((item) => extractHoster(item.url)).filter(Boolean))].join(", ");
+    return <span className="downloads-cell" title={value}>{value}</span>;
+  }
+  if (column === "account") {
+    const value = compactProviderLabels(row.items.map((item) => item.providerLabel || (item.provider ? providerLabels[item.provider] : "")).filter(Boolean));
+    return <span className="downloads-cell" title={value}>{value}</span>;
+  }
+  if (column === "prio") return <span className="downloads-cell">{entry.priority === "high" ? "Hoch" : entry.priority === "low" ? "Niedrig" : ""}</span>;
+  if (column === "status") {
+    const audio = entry.audioStripSummary ? formatAudioStripSummary(entry.audioStripSummary) : null;
+    return <span className="downloads-cell" title={audio?.tooltip}>{stats.done}/{stats.total}{stats.failed > 0 ? ` · ${stats.failed} Fehler` : ""}{stats.cancelled > 0 ? ` · ${stats.cancelled} abgebrochen` : ""}{entry.postProcessLabel ? ` · ${entry.postProcessLabel}` : ""}{audio ? ` · ${audio.text}` : ""}</span>;
+  }
+  if (column === "speed") return <span className="downloads-cell">{packageSpeedBps > 0 ? formatSpeedMbps(packageSpeedBps) : ""}</span>;
+  if (column === "added") return <span className="downloads-cell">{formatDateTime(entry.createdAt)}</span>;
+  return null;
+}
+
+export interface PackageCardProps {
+  row: DownloadPackageRow;
+  selectedIds: Set<string>;
+  selectedVersion: number;
+  editing: boolean;
+  editingName: string;
+  packageSpeedBps: number;
+  sessionRunning?: boolean;
+  columnOrder: readonly string[];
+  gridTemplate: string;
+  actions: DownloadsTableActions;
+  draggable?: boolean;
+  onDragStart?: (packageId: string) => void;
+  onDrop?: (packageId: string) => void;
+  onDragEnd?: () => void;
+}
+
+export function PackageCardContent({ row, selectedIds, editing, editingName, packageSpeedBps, sessionRunning = true, columnOrder, gridTemplate, actions, draggable = true, onDragStart, onDrop, onDragEnd }: PackageCardProps): ReactElement {
+  const entry = row.package;
+  let renameFinished = false;
+  const finishRename = (value: string): void => {
+    if (renameFinished) return;
+    renameFinished = true;
+    actions.onCommitPackageRename(entry.id, value);
+  };
+  return (
+    <article
+      className={`package-card downloads-package-card${entry.enabled ? "" : " is-disabled"}${selectedIds.has(entry.id) ? " is-selected" : ""}`}
+      data-download-package-id={entry.id}
+      draggable={draggable}
+      onContextMenu={(event) => {
+        event.preventDefault();
+        event.stopPropagation();
+        actions.onOpenContextMenu(entry.id, event.clientX, event.clientY, entry.id);
+      }}
+      onDragStart={(event) => { event.stopPropagation(); onDragStart?.(entry.id); }}
+      onDragOver={(event) => { event.preventDefault(); event.stopPropagation(); }}
+      onDrop={(event) => { event.preventDefault(); event.stopPropagation(); onDrop?.(entry.id); }}
+      onDragEnd={(event) => { event.stopPropagation(); onDragEnd?.(); }}
+    >
+      <div
+        className="downloads-package-row"
+        data-download-row-id={entry.id}
+        role="row"
+        style={{ gridTemplateColumns: `36px ${gridTemplate} 44px` }}
+        onClick={(event) => {
+          const target = event.target as HTMLElement;
+          if (event.ctrlKey || event.metaKey || event.shiftKey) {
+            actions.onToggleSelection(entry.id, event.ctrlKey || event.metaKey, event.shiftKey);
+            return;
+          }
+          if (target.closest("button, input, select")) return;
+          actions.onTogglePackageCollapse(entry.id);
+        }}
+        onMouseDown={(event) => actions.onSelectionMouseDown(entry.id, event)}
+        onMouseEnter={() => actions.onSelectionMouseEnter(entry.id)}
+      >
+        <span className="downloads-selection-cell" role="cell"><input aria-label={`${entry.name} auswählen`} checked={selectedIds.has(entry.id)} onChange={() => actions.onToggleSelection(entry.id, true, false)} onClick={(event) => event.stopPropagation()} type="checkbox" /></span>
+        {columnOrder.map((column) => <span className="downloads-cell-slot" key={column} role="cell">{packageCell(row, column, packageSpeedBps, editing, editingName, actions, finishRename)}</span>)}
+        <span className="downloads-action-cell" role="cell"><button aria-label={`${entry.name} Aktionen`} onClick={(event) => { event.stopPropagation(); actions.onOpenContextMenu(entry.id, event.clientX, event.clientY, entry.id); }} type="button">⋮</button></span>
+      </div>
+      {!row.collapsed && row.items.map((item) => <ItemRow actions={actions} columnOrder={columnOrder} gridTemplate={gridTemplate} item={item} key={item.id} selected={selectedIds.has(item.id)} sessionRunning={sessionRunning} />)}
+    </article>
+  );
+}
+
+export function arePackageCardPropsEqual(previous: PackageCardProps, next: PackageCardProps): boolean {
+  const a = previous.row.package;
+  const b = next.row.package;
+  if (a.id !== b.id || a.updatedAt !== b.updatedAt || a.status !== b.status || a.enabled !== b.enabled || a.name !== b.name || a.priority !== b.priority || a.createdAt !== b.createdAt) return false;
+  if (previous.packageSpeedBps !== next.packageSpeedBps || previous.editing !== next.editing || previous.editingName !== next.editingName || previous.row.collapsed !== next.row.collapsed || previous.sessionRunning !== next.sessionRunning || previous.columnOrder !== next.columnOrder || previous.gridTemplate !== next.gridTemplate || previous.actions !== next.actions || previous.draggable !== next.draggable || previous.onDragStart !== next.onDragStart || previous.onDrop !== next.onDrop || previous.onDragEnd !== next.onDragEnd) return false;
+  if (previous.selectedVersion !== next.selectedVersion || previous.selectedIds !== next.selectedIds) {
+    if (previous.selectedIds.has(a.id) !== next.selectedIds.has(a.id)) return false;
+    for (const itemId of b.itemIds) {
+      if (previous.selectedIds.has(itemId) !== next.selectedIds.has(itemId)) return false;
+    }
+  }
+  if (previous.row.items.length !== next.row.items.length) return false;
+  for (let index = 0; index < previous.row.items.length; index += 1) {
+    const oldItem = previous.row.items[index];
+    const newItem = next.row.items[index];
+    if (!oldItem || !newItem || !areItemRowPropsEqual({ actions: previous.actions, columnOrder: previous.columnOrder, gridTemplate: previous.gridTemplate, item: oldItem, selected: previous.selectedIds.has(oldItem.id), sessionRunning: previous.sessionRunning }, { actions: next.actions, columnOrder: next.columnOrder, gridTemplate: next.gridTemplate, item: newItem, selected: next.selectedIds.has(newItem.id), sessionRunning: next.sessionRunning })) return false;
+  }
+  return true;
+}
+
+export const PackageCard = memo(PackageCardContent, arePackageCardPropsEqual);
+
+export interface DownloadsTableHeaderProps {
+  actions: DownloadsTableActions;
+  columnOrder: readonly string[];
+  gridTemplate: string;
+  sortColumn: DownloadSortColumn;
+  sortDirection: "asc" | "desc";
+  selectedCount: number;
+  visibleIds: string[];
+}
+
+export function DownloadsTableHeader({ actions, columnOrder, gridTemplate, sortColumn, sortDirection, selectedCount, visibleIds }: DownloadsTableHeaderProps): ReactElement {
+  return (
+    <div className="downloads-table-header" role="row" style={{ gridTemplateColumns: `36px ${gridTemplate} 44px` }}>
+      <span className="downloads-selection-cell" role="columnheader"><input aria-label="Alle sichtbaren Downloads auswählen" checked={visibleIds.length > 0 && selectedCount === visibleIds.length} onChange={(event) => actions.onSetVisibleSelection(visibleIds, event.target.checked)} type="checkbox" /></span>
+      {columnOrder.map((column) => {
+        const definition = downloadColumnDefinitions[column];
+        if (!definition) return null;
+        return (
+          <div
+            className="downloads-column-header"
+            draggable
+            key={column}
+            onContextMenu={(event) => { event.preventDefault(); actions.onColumnContextMenu(column, event.clientX, event.clientY); }}
+            onDragEnd={actions.onColumnDragEnd}
+            onDragLeave={actions.onColumnDragLeave}
+            onDragOver={(event) => actions.onColumnDragOver(column, event)}
+            onDragStart={(event) => actions.onColumnDragStart(column, event)}
+            onDrop={(event) => actions.onColumnDrop(column, event)}
+            role="columnheader"
+          >
+            {definition.sortable
+              ? <button onClick={() => actions.onSortColumn(definition.sortable!)} type="button">{definition.label}{sortColumn === definition.sortable ? sortDirection === "asc" ? " ↑" : " ↓" : ""}</button>
+              : definition.label}
+          </div>
+        );
+      })}
+      <span className="downloads-action-cell" role="columnheader">Aktion</span>
+    </div>
+  );
+}

src/renderer/views/downloads/DownloadsView.tsx

@@ -0,0 +1,197 @@
+import type { ReactElement } from "react";
+import type { DownloadPackageRow, DownloadsViewModelCore, DownloadDisplayMode, DownloadSidebarFilter } from "./downloads-model";
+import {
+  DownloadsTableHeader,
+  ItemRow,
+  PackageCard,
+  type DownloadSortColumn,
+  type DownloadsTableActions
+} from "./DownloadsTable";
+import "./downloads.css";
+
+export interface DownloadsStatusModel {
+  packages: number;
+  links: number;
+  session: string;
+  total: string;
+  hosters: number;
+  speed: string;
+  eta: string;
+}
+
+export interface DownloadsViewModel extends DownloadsViewModelCore {
+  running: boolean;
+  paused: boolean;
+  canStart: boolean;
+  canPause: boolean;
+  canStop: boolean;
+  actionBusy: boolean;
+  reconnectSeconds: number;
+  reconnectReason: string;
+  clipboardWatcher: boolean;
+  scheduleActive: boolean;
+  scheduleOpen: boolean;
+  scheduleTime: string;
+  scheduleLabel: string;
+  packageSpeedBps: Record<string, number>;
+  editingPackageId: string | null;
+  editingName: string;
+  columnOrder: readonly string[];
+  gridTemplate: string;
+  sortColumn?: DownloadSortColumn;
+  sortDirection?: "asc" | "desc";
+  status: DownloadsStatusModel;
+}
+
+export interface DownloadsViewActions extends DownloadsTableActions {
+  onDisplayModeChange: (mode: DownloadDisplayMode) => void;
+  onFilterChange: (filter: DownloadSidebarFilter) => void;
+  onProviderFilterChange: (provider: string) => void;
+  onQueryChange: (query: string) => void;
+  onAddLinks: () => void;
+  onStartDownloads: () => void;
+  onPauseDownloads: () => void;
+  onStopDownloads: () => void;
+  onToggleSchedule: () => void;
+  onScheduleTimeChange: (value: string) => void;
+  onActivateSchedule: () => void;
+  onCancelSchedule: () => void;
+  onMoveSelectionUp: () => void;
+  onMoveSelectionDown: () => void;
+  onRenameSelection: () => void;
+  onRemoveSelection: () => void;
+  onToggleClipboardWatcher: () => void;
+  onClearAll: () => void;
+  onToggleAllPackages: () => void;
+  onShowAllPackages: () => void;
+  onPackageDragStart: (packageId: string) => void;
+  onPackageDrop: (packageId: string) => void;
+  onPackageDragEnd: () => void;
+}
+
+const filters: Array<{ id: DownloadSidebarFilter; label: string }> = [
+  { id: "all", label: "Alle" },
+  { id: "active", label: "Aktiv" },
+  { id: "queued", label: "Wartend" },
+  { id: "paused", label: "Pausiert" },
+  { id: "completed", label: "Fertig" },
+  { id: "failed", label: "Fehler" }
+];
+
+export function DownloadsSidebar({ actions, model }: { actions: DownloadsViewActions; model: DownloadsViewModel }): ReactElement {
+  return (
+    <aside className="downloads-sidebar" data-visual-region="downloads-sidebar">
+      <div className="downloads-mode-switch" role="group" aria-label="Downloadansicht">
+        <button className={model.displayMode === "packages" ? "is-active" : ""} onClick={() => actions.onDisplayModeChange("packages")} type="button">Pakete</button>
+        <button className={model.displayMode === "files" ? "is-active" : ""} onClick={() => actions.onDisplayModeChange("files")} type="button">Dateien</button>
+      </div>
+      <nav aria-label="Downloadfilter">
+        {filters.map((filter) => <button className={model.filter === filter.id ? "is-active" : ""} key={filter.id} onClick={() => actions.onFilterChange(filter.id)} type="button"><span>{filter.label}</span><b>{model.counts[filter.id]}</b></button>)}
+      </nav>
+      <label className="downloads-provider-filter"><span>Service</span><select aria-label="Service filtern" onChange={(event) => actions.onProviderFilterChange(event.target.value)} value={model.providerFilter}><option value="all">Alle Services</option>{model.providerOptions.map((provider) => <option key={provider.id} value={provider.id}>{provider.label}</option>)}</select></label>
+      <label className="downloads-sidebar-search"><span>Downloads durchsuchen</span><input className="downloads-search-input" onChange={(event) => actions.onQueryChange(event.target.value)} placeholder="Paket, Datei oder Service" type="search" value={model.query} /></label>
+      <div className="downloads-sidebar-actions">
+        <button onClick={actions.onToggleAllPackages} type="button">Alle ein-/ausklappen</button>
+        <button disabled={model.empty} onClick={actions.onClearAll} type="button">Liste leeren</button>
+        <label><input checked={model.clipboardWatcher} onChange={actions.onToggleClipboardWatcher} type="checkbox" />Zwischenablage überwachen</label>
+      </div>
+    </aside>
+  );
+}
+
+export function DownloadsSidebarStatus({ model }: { model: DownloadsViewModel }): ReactElement {
+  const entries = [
+    ["Pakete", String(model.status.packages)],
+    ["Links", String(model.status.links)],
+    ["Sitzung", model.status.session],
+    ["Gesamt", model.status.total],
+    ["Hoster", String(model.status.hosters)],
+    ["Geschwindigkeit", model.status.speed],
+    ["ETA", model.status.eta]
+  ];
+  return <section className="downloads-sidebar-status" data-visual-region="downloads-sidebar-status" aria-label="Downloadstatus">{entries.map(([label, value]) => <div key={label}><span>{label}</span><strong>{value}</strong></div>)}</section>;
+}
+
+export function DownloadsToolbar({ actions, model }: { actions: DownloadsViewActions; model: DownloadsViewModel }): ReactElement {
+  const hasSelection = model.actionableSelectedIds.length > 0;
+  const hasSelectedPackage = model.actionableSelectedPackageIds.length > 0;
+  const onePackage = model.actionableSelectedPackageIds.length === 1 && model.actionableSelectedIds.length === 1;
+  return (
+    <div className="downloads-toolbar" data-visual-region="downloads-toolbar">
+      <button className="ui-primary-button" onClick={actions.onAddLinks} type="button">Links hinzufügen</button>
+      <span className="downloads-toolbar-divider" />
+      <button disabled={model.actionBusy || (!model.canStart && !model.paused)} onClick={actions.onStartDownloads} type="button">Start</button>
+      <button disabled={!model.canPause || model.paused} onClick={actions.onPauseDownloads} type="button">Pause</button>
+      <button disabled={!model.canStop || model.actionBusy} onClick={actions.onStopDownloads} type="button">Stop</button>
+      {model.scheduleActive
+        ? <span className="downloads-schedule-controls"><strong>Geplant: {model.scheduleLabel}</strong><button disabled={false} onClick={actions.onCancelSchedule} type="button">Abbrechen</button></span>
+        : <><button aria-expanded={model.scheduleOpen} onClick={actions.onToggleSchedule} type="button">Zeitplan</button>{model.scheduleOpen ? <span className="downloads-schedule-controls"><input aria-label="Startzeit" onChange={(event) => actions.onScheduleTimeChange(event.target.value)} type="time" value={model.scheduleTime} /><button onClick={actions.onActivateSchedule} type="button">Planen</button></span> : null}</>}
+      <span className="downloads-toolbar-divider" />
+      <button disabled={!hasSelectedPackage} onClick={actions.onMoveSelectionUp} type="button">Nach oben</button>
+      <button disabled={!hasSelectedPackage} onClick={actions.onMoveSelectionDown} type="button">Nach unten</button>
+      <button disabled={!onePackage} onClick={actions.onRenameSelection} type="button">Umbenennen</button>
+      <button disabled={!hasSelection} onClick={actions.onRemoveSelection} type="button">Entfernen</button>
+    </div>
+  );
+}
+
+function tableState(model: DownloadsViewModel): ReactElement | null {
+  if (model.empty) return <div className="downloads-empty-state" data-visual-region="downloads-empty-state" role="row"><div role="cell"><strong>Noch keine Downloads</strong><span>Füge Links hinzu, um den ersten Download zu starten.</span></div></div>;
+  if (model.filteredEmpty) return <div className="downloads-table-message" role="row"><div role="cell"><strong>Keine passenden Downloads</strong><span>Passe Filter oder Suche an.</span></div></div>;
+  return null;
+}
+
+function packageRows(model: DownloadsViewModel, actions: DownloadsViewActions): ReactElement[] {
+  return model.packageRows.map((row: DownloadPackageRow) => (
+    <PackageCard
+      actions={actions}
+      columnOrder={model.columnOrder}
+      editing={model.editingPackageId === row.package.id}
+      editingName={model.editingName}
+      gridTemplate={model.gridTemplate}
+      key={row.package.id}
+      packageSpeedBps={model.packageSpeedBps[row.package.id] ?? 0}
+      onDragEnd={actions.onPackageDragEnd}
+      onDragStart={actions.onPackageDragStart}
+      onDrop={actions.onPackageDrop}
+      row={row}
+      selectedIds={model.selectedIds}
+      selectedVersion={model.actionableSelectedIds.length}
+      sessionRunning={model.running}
+    />
+  ));
+}
+
+export function DownloadsContent({ actions, model }: { actions: DownloadsViewActions; model: DownloadsViewModel }): ReactElement {
+  return (
+    <main className="downloads-content">
+      <div className="downloads-table" role="table" aria-label="Downloads">
+        <DownloadsTableHeader actions={actions} columnOrder={model.columnOrder} gridTemplate={model.gridTemplate} selectedCount={model.actionableSelectedIds.length} sortColumn={model.sortColumn ?? "name"} sortDirection={model.sortDirection ?? "asc"} visibleIds={model.visibleRowIds} />
+        <div className="downloads-table-body" data-visual-region="downloads-table-body" role="rowgroup">
+          {tableState(model)}
+          {!model.empty && !model.filteredEmpty && model.displayMode === "packages" ? packageRows(model, actions) : null}
+          {!model.empty && !model.filteredEmpty && model.displayMode === "files" ? model.fileRows.map((item) => <ItemRow actions={actions} columnOrder={model.columnOrder} gridTemplate={model.gridTemplate} item={item} key={item.id} selected={model.selectedIds.has(item.id)} sessionRunning={model.running} />) : null}
+        </div>
+      </div>
+    </main>
+  );
+}
+
+export function DownloadsFooter({ actions, model }: { actions: DownloadsViewActions; model: DownloadsViewModel }): ReactElement {
+  return (
+    <footer className="downloads-footer" data-visual-region="downloads-pagination">
+      <span>{model.paginationLabel}</span>
+      {model.limited ? <button onClick={actions.onShowAllPackages} type="button">Alle anzeigen</button> : null}
+      <span>{model.running ? model.paused ? "Pausiert" : "Download läuft" : "Bereit"}</span>
+    </footer>
+  );
+}
+
+export function DownloadsView({ actions, model }: { actions: DownloadsViewActions; model: DownloadsViewModel }): ReactElement {
+  return (
+    <div className="downloads-view">
+      <div className="downloads-side-column"><DownloadsSidebar actions={actions} model={model} /><DownloadsSidebarStatus model={model} /></div>
+      <div className="downloads-main-column"><DownloadsToolbar actions={actions} model={model} /><DownloadsContent actions={actions} model={model} /><DownloadsFooter actions={actions} model={model} /></div>
+    </div>
+  );
+}

src/renderer/views/downloads/downloads-model.ts

@@ -0,0 +1,186 @@
+import type { DownloadItem, DownloadStatus, PackageEntry } from "../../../shared/types";
+
+export type DownloadDisplayMode = "packages" | "files";
+export type DownloadSidebarFilter = "all" | "active" | "queued" | "paused" | "completed" | "failed";
+
+export interface DownloadsModelInput {
+  packageOrder: string[];
+  packages: Record<string, PackageEntry>;
+  items: Record<string, DownloadItem>;
+  displayMode: DownloadDisplayMode;
+  filter: DownloadSidebarFilter;
+  providerFilter: string;
+  query: string;
+  collapsedPackageIds: Iterable<string>;
+  selectedIds: Iterable<string>;
+  hideExtractedItems: boolean;
+  showAllPackages: boolean;
+  renderLimit: number;
+}
+
+export interface DownloadFilterCounts {
+  all: number;
+  active: number;
+  queued: number;
+  paused: number;
+  completed: number;
+  failed: number;
+}
+
+export interface DownloadPackageRow {
+  package: PackageEntry;
+  items: DownloadItem[];
+  collapsed: boolean;
+}
+
+export interface DownloadsViewModelCore {
+  displayMode: DownloadDisplayMode;
+  filter: DownloadSidebarFilter;
+  providerFilter: string;
+  providerOptions: Array<{ id: string; label: string }>;
+  query: string;
+  counts: DownloadFilterCounts;
+  packageRows: DownloadPackageRow[];
+  fileRows: DownloadItem[];
+  visibleItemIds: string[];
+  visibleRowIds: string[];
+  actionableSelectedIds: string[];
+  actionableSelectedPackageIds: string[];
+  selectedIds: Set<string>;
+  mainRowCount: number;
+  totalMainRowCount: number;
+  paginationLabel: string;
+  limited: boolean;
+  empty: boolean;
+  filteredEmpty: boolean;
+}
+
+const activeStatuses = new Set<DownloadStatus>(["downloading", "validating", "extracting", "integrity_check"]);
+const queuedStatuses = new Set<DownloadStatus>(["queued", "reconnect_wait"]);
+
+export function classifyDownloadStatus(status: DownloadStatus): DownloadSidebarFilter {
+  if (activeStatuses.has(status)) return "active";
+  if (queuedStatuses.has(status)) return "queued";
+  if (status === "paused" || status === "completed" || status === "failed") return status;
+  return "all";
+}
+
+export function buildDownloadSidebarCounts(items: Iterable<DownloadItem>): DownloadFilterCounts {
+  const counts: DownloadFilterCounts = { all: 0, active: 0, queued: 0, paused: 0, completed: 0, failed: 0 };
+  for (const item of items) {
+    counts.all += 1;
+    const category = classifyDownloadStatus(item.status);
+    if (category !== "all") counts[category] += 1;
+  }
+  return counts;
+}
+
+function isExtracted(item: DownloadItem): boolean {
+  return item.fullStatus.trim().toLocaleLowerCase("de-DE").startsWith("entpackt");
+}
+
+function matchesQuery(value: string | undefined, query: string): boolean {
+  return Boolean(value?.toLocaleLowerCase("de-DE").includes(query));
+}
+
+function matchesFilter(item: DownloadItem, filter: DownloadSidebarFilter): boolean {
+  return filter === "all" || classifyDownloadStatus(item.status) === filter;
+}
+
+function matchesProvider(item: DownloadItem, providerFilter: string): boolean {
+  return providerFilter === "all" || item.provider === providerFilter;
+}
+
+function isActivePackage(row: DownloadPackageRow): boolean {
+  return row.items.some((entry) => classifyDownloadStatus(entry.status) === "active");
+}
+
+function paginationLabel(visible: number, total: number): string {
+  if (visible === 0 || total === 0) return "0 von 0";
+  return `1–${visible} von ${total}`;
+}
+
+export function buildDownloadsViewModel(input: DownloadsModelInput): DownloadsViewModelCore {
+  const allPackages = input.packageOrder
+    .map((id) => input.packages[id])
+    .filter((entry): entry is PackageEntry => Boolean(entry));
+  const allItems = allPackages.flatMap((entry) => entry.itemIds.map((id) => input.items[id]).filter((item): item is DownloadItem => Boolean(item)));
+  const counts = buildDownloadSidebarCounts(allItems);
+  const providerMap = new Map<string, string>();
+  for (const entry of allItems) {
+    if (entry.provider) providerMap.set(entry.provider, entry.providerLabel?.trim() || entry.provider);
+  }
+
+  const query = input.query.trim().toLocaleLowerCase("de-DE");
+  const collapsed = new Set(input.collapsedPackageIds);
+  const selectedIds = new Set(input.selectedIds);
+  let packageRows = allPackages.flatMap((entry): DownloadPackageRow[] => {
+    const items = entry.itemIds
+      .map((id) => input.items[id])
+      .filter((item): item is DownloadItem => Boolean(item))
+      .filter((item) => !input.hideExtractedItems || !isExtracted(item));
+    const packageMatchesQuery = query === "" || matchesQuery(entry.name, query) || matchesQuery(entry.status, query);
+    const matchingItems = items.filter((item) => {
+      const itemMatchesQuery = query === ""
+        || matchesQuery(item.fileName, query)
+        || matchesQuery(item.targetPath, query)
+        || matchesQuery(item.providerLabel, query)
+        || matchesQuery(item.providerAccountLabel, query)
+        || matchesQuery(item.fullStatus, query)
+        || matchesQuery(item.lastError, query);
+      return matchesFilter(item, input.filter) && matchesProvider(item, input.providerFilter) && (packageMatchesQuery || itemMatchesQuery);
+    });
+    if (matchingItems.length === 0) return [];
+    const visibleItems = packageMatchesQuery && query !== ""
+      ? items.filter((item) => matchesFilter(item, input.filter) && matchesProvider(item, input.providerFilter))
+      : matchingItems;
+    return [{ package: entry, items: visibleItems, collapsed: collapsed.has(entry.id) }];
+  });
+
+  const totalPackageRows = packageRows.length;
+  const allMatchingFileRows = packageRows.flatMap((row) => row.items);
+  if (!input.showAllPackages && input.renderLimit > 0 && packageRows.length > input.renderLimit) {
+    const activeRows = packageRows.filter(isActivePackage);
+    const inactiveRows = packageRows.filter((row) => !isActivePackage(row));
+    packageRows = [...activeRows, ...inactiveRows].slice(0, input.renderLimit);
+  }
+
+  const fileRows = input.displayMode === "files" ? allMatchingFileRows : [];
+  const displayedPackages = input.displayMode === "packages" ? packageRows : [];
+  const visibleItemIds = (input.displayMode === "files"
+    ? fileRows
+    : displayedPackages.flatMap((row) => row.collapsed ? [] : row.items)).map((entry) => entry.id);
+  const visibleRowIds = input.displayMode === "files"
+    ? visibleItemIds
+    : displayedPackages.flatMap((row) => row.collapsed ? [row.package.id] : [row.package.id, ...row.items.map((entry) => entry.id)]);
+  const visibleRowSet = new Set(visibleRowIds);
+  const actionableSelectedIds = [...selectedIds].filter((id) => visibleRowSet.has(id));
+  const visiblePackageSet = new Set(displayedPackages.map((row) => row.package.id));
+  const actionableSelectedPackageIds = actionableSelectedIds.filter((id) => visiblePackageSet.has(id));
+  const mainRowCount = input.displayMode === "files" ? fileRows.length : displayedPackages.length;
+  const totalMainRowCount = input.displayMode === "files"
+    ? fileRows.length
+    : totalPackageRows;
+
+  return {
+    displayMode: input.displayMode,
+    filter: input.filter,
+    providerFilter: input.providerFilter,
+    providerOptions: [...providerMap].map(([id, label]) => ({ id, label })).sort((left, right) => left.label.localeCompare(right.label, "de")),
+    query: input.query,
+    counts,
+    packageRows: displayedPackages,
+    fileRows,
+    visibleItemIds,
+    visibleRowIds,
+    actionableSelectedIds,
+    actionableSelectedPackageIds,
+    selectedIds,
+    mainRowCount,
+    totalMainRowCount,
+    paginationLabel: paginationLabel(mainRowCount, totalMainRowCount),
+    limited: mainRowCount < totalMainRowCount,
+    empty: allItems.length === 0,
+    filteredEmpty: allItems.length > 0 && mainRowCount === 0
+  };
+}

src/renderer/views/downloads/downloads.css

@@ -0,0 +1,423 @@
+.downloads-view {
+  display: grid;
+  grid-template-columns: 270px minmax(0, 1fr);
+  min-height: 0;
+  height: 100%;
+  overflow: hidden;
+  background: var(--ui-canvas);
+}
+
+.downloads-side-column {
+  display: flex;
+  flex-direction: column;
+  min-height: 0;
+  border-right: 1px solid var(--ui-border);
+  background: var(--ui-surface);
+}
+
+.downloads-sidebar,
+.downloads-sidebar-status,
+.downloads-toolbar,
+.downloads-content,
+.downloads-footer {
+  user-select: none;
+}
+
+.downloads-copyable,
+.downloads-search-input,
+.downloads-rename-input {
+  user-select: text;
+}
+
+.downloads-sidebar {
+  display: flex;
+  flex: 1;
+  flex-direction: column;
+  gap: 14px;
+  min-height: 0;
+  padding: 14px 12px;
+}
+
+.downloads-mode-switch {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 2px;
+  padding: 2px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+}
+
+.downloads-mode-switch button,
+.downloads-sidebar nav button,
+.downloads-sidebar-actions button {
+  min-height: 36px;
+  border: 0;
+  border-radius: 4px;
+  color: var(--ui-text);
+  background: transparent;
+  text-align: left;
+}
+
+.downloads-mode-switch button {
+  text-align: center;
+}
+
+.downloads-mode-switch button.is-active,
+.downloads-sidebar nav button.is-active {
+  color: #ffffff;
+  background: var(--ui-accent);
+}
+
+.downloads-sidebar nav {
+  display: grid;
+  gap: 3px;
+}
+
+.downloads-sidebar nav button {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0 10px;
+}
+
+.downloads-provider-filter,
+.downloads-sidebar-search {
+  display: grid;
+  gap: 5px;
+  color: var(--ui-text-muted);
+  font-size: 12px;
+}
+
+.downloads-provider-filter select,
+.downloads-sidebar-search input,
+.downloads-schedule-controls input,
+.downloads-rename-input {
+  height: 36px;
+  border: 1px solid var(--ui-border);
+  border-radius: 5px;
+  padding: 0 10px;
+  color: var(--ui-text);
+  background: var(--ui-input);
+}
+
+.downloads-sidebar-actions {
+  display: grid;
+  gap: 5px;
+  margin-top: auto;
+}
+
+.downloads-sidebar-actions label {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-height: 36px;
+  padding: 0 8px;
+}
+
+.downloads-sidebar-status {
+  display: grid;
+  gap: 6px;
+  padding: 12px;
+  border-top: 1px solid var(--ui-border);
+}
+
+.downloads-sidebar-status div {
+  display: flex;
+  justify-content: space-between;
+  gap: 10px;
+  color: var(--ui-text-muted);
+  font-size: 12px;
+}
+
+.downloads-sidebar-status strong {
+  color: var(--ui-text);
+  font-weight: 600;
+  text-align: right;
+}
+
+.downloads-main-column {
+  display: grid;
+  grid-template-rows: auto minmax(0, 1fr) 60px;
+  min-width: 0;
+  min-height: 0;
+  overflow: hidden;
+}
+
+.downloads-toolbar {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  min-height: 52px;
+  padding: 8px 10px;
+  border-bottom: 1px solid var(--ui-border);
+  background: var(--ui-surface);
+}
+
+.downloads-toolbar button,
+.downloads-footer button,
+.downloads-action-cell button,
+.downloads-collapse-button,
+.downloads-column-header button {
+  min-height: 36px;
+  height: 36px;
+  border: 1px solid var(--ui-border);
+  border-radius: 5px;
+  padding: 0 10px;
+  color: var(--ui-text);
+  background: var(--ui-modal-secondary);
+}
+
+.downloads-toolbar button:disabled,
+.downloads-footer button:disabled {
+  opacity: 0.42;
+}
+
+.downloads-toolbar-divider {
+  width: 1px;
+  align-self: stretch;
+  margin: 1px 2px;
+  background: var(--ui-border);
+}
+
+.downloads-schedule-controls {
+  display: flex;
+  align-items: center;
+  gap: 5px;
+}
+
+.downloads-schedule-controls input {
+  height: 36px;
+}
+
+.downloads-sidebar-search span {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+}
+
+.downloads-content {
+  min-width: 0;
+  min-height: 0;
+  height: 100%;
+  overflow: hidden;
+  background: var(--ui-canvas);
+}
+
+.downloads-table {
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  overflow-x: auto;
+  overflow-y: auto;
+}
+
+.downloads-table-header {
+  display: grid;
+  align-items: center;
+  height: 41px;
+  position: sticky;
+  top: 0;
+  z-index: 2;
+  min-width: max-content;
+  border-bottom: 1px solid var(--ui-border);
+  color: var(--ui-text-muted);
+  background: var(--ui-table-header);
+  font-size: 11px;
+  font-weight: 700;
+  text-transform: uppercase;
+}
+
+.downloads-table-body {
+  min-width: max-content;
+  overflow: visible;
+}
+
+.downloads-package-card {
+  min-width: max-content;
+  border: 0;
+  border-bottom: 1px solid var(--ui-border);
+  border-radius: 0;
+  padding: 0;
+  background: var(--ui-canvas);
+}
+
+.downloads-package-card.is-disabled {
+  opacity: 0.58;
+}
+
+.downloads-item-row,
+.downloads-package-row {
+  display: grid;
+  align-items: center;
+  height: 48px;
+  min-width: max-content;
+  color: var(--ui-text);
+  background: var(--ui-canvas);
+}
+
+.downloads-item-row {
+  border-top: 1px solid var(--ui-border);
+  color: var(--ui-text-muted);
+}
+
+.downloads-item-row.is-selected,
+.downloads-package-card.is-selected > .downloads-package-row {
+  background: var(--ui-active);
+}
+
+.downloads-cell-slot {
+  min-width: 0;
+}
+
+.downloads-cell,
+.downloads-name-cell {
+  display: flex;
+  align-items: center;
+  gap: 7px;
+  min-width: 0;
+  padding: 0 9px;
+  overflow: hidden;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
+
+.downloads-name-cell strong {
+  min-width: 0;
+  overflow: hidden;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
+
+.downloads-selection-cell,
+.downloads-action-cell {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-width: 0;
+}
+
+.downloads-action-cell button,
+.downloads-collapse-button {
+  width: 30px;
+  height: 30px;
+  min-height: 30px;
+  padding: 0;
+}
+
+.downloads-column-header {
+  min-width: 0;
+  padding: 0 9px;
+  overflow: hidden;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
+
+.downloads-column-header button {
+  width: 100%;
+  border: 0;
+  padding: 0;
+  background: transparent;
+  text-align: left;
+  text-transform: inherit;
+}
+
+.downloads-link-state {
+  flex: 0 0 8px;
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  background: var(--ui-text-muted);
+}
+
+.downloads-link-state.online {
+  background: var(--ui-primary);
+}
+
+.downloads-link-state.offline {
+  background: var(--ui-danger);
+}
+
+.downloads-link-state.checking {
+  background: var(--ui-warning);
+}
+
+.downloads-meter {
+  position: relative;
+  display: block;
+  width: 100%;
+  height: 24px;
+  overflow: hidden;
+  border: 1px solid var(--ui-border);
+  border-radius: 4px;
+  background: var(--ui-modal-secondary);
+}
+
+.downloads-meter > span {
+  position: absolute;
+  inset: 0 auto 0 0;
+  background: color-mix(in srgb, var(--ui-accent) 58%, transparent);
+}
+
+.downloads-meter > b {
+  position: relative;
+  z-index: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  font-size: 11px;
+  font-weight: 600;
+}
+
+.downloads-empty-state,
+.downloads-table-message {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 240px;
+  color: var(--ui-text-muted);
+}
+
+.downloads-empty-state > div,
+.downloads-table-message > div {
+  display: grid;
+  gap: 4px;
+  text-align: center;
+}
+
+.downloads-empty-state strong,
+.downloads-table-message strong {
+  color: var(--ui-text);
+}
+
+.downloads-footer {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  height: 60px;
+  padding: 0 12px 0 60px;
+  border-top: 1px solid var(--ui-border);
+  color: var(--ui-text-muted);
+  background: var(--ui-surface);
+  font-size: 12px;
+}
+
+@media (max-width: 1366px) {
+  .downloads-view {
+    grid-template-columns: 56px minmax(0, 1fr);
+  }
+
+  .downloads-side-column {
+    overflow: hidden;
+  }
+}
+
+@media (max-width: 1120px) {
+  .downloads-toolbar,
+  .downloads-footer {
+    overflow-x: auto;
+  }
+}

src/renderer/views/history/HistoryView.tsx

@@ -0,0 +1,239 @@
+import type { ChangeEvent, MouseEvent, ReactElement } from "react";
+import {
+  DataTable,
+  DataTableBody,
+  DataTableEmpty,
+  DataTableFooter,
+  DataTableHeader
+} from "../../ui/DataTable";
+import { Toolbar, ToolbarGroup, ToolbarSearch } from "../../ui/Toolbar";
+import type { HistoryFilter, HistoryRow, HistoryViewModel } from "./history-model";
+import "./history.css";
+
+export interface HistoryViewActions {
+  onFilterChange: (filter: HistoryFilter) => void;
+  onQueryChange: (value: string) => void;
+  onToggleSelection: (entryId: string) => void;
+  onToggleSelectAll: (visibleIds: string[]) => void;
+  onToggleExpansion: (entryId: string) => void;
+  onRestore: (entryIds: string[]) => void;
+  onReveal: (entryId: string) => void;
+  onRemove: (entryIds: string[]) => void;
+  onClearSelection: () => void;
+  onClearHistory: () => void;
+  onContextMenu: (entryId: string, x: number, y: number) => void;
+}
+
+export interface HistoryViewProps {
+  model: HistoryViewModel;
+  actions: HistoryViewActions;
+}
+
+const filterItems: Array<{ id: HistoryFilter; label: string }> = [
+  { id: "all", label: "Alle Einträge" },
+  { id: "today", label: "Heute" },
+  { id: "week", label: "Letzte 7 Tage" },
+  { id: "older", label: "Älter" },
+  { id: "completed", label: "Fertig" },
+  { id: "deleted", label: "Gelöscht" },
+  { id: "failed", label: "Fehlgeschlagen" }
+];
+
+function HistoryRowDetails({ row }: { row: HistoryRow }): ReactElement {
+  return (
+    <div className="history-detail-row" role="row">
+      <div className="history-detail-cell" role="cell">
+        <dl className="history-details-grid">
+          <div><dt>Provider</dt><dd>{row.providerLabel}</dd></div>
+          <div><dt>Dateien</dt><dd>{row.fileCount}</dd></div>
+          <div><dt>Dauer</dt><dd>{row.durationLabel}</dd></div>
+          <div><dt>Durchschnitt</dt><dd>{row.averageSpeedLabel}</dd></div>
+          <div className="history-detail-wide"><dt>Zielordner</dt><dd className="history-copyable">{row.outputDir || "—"}</dd></div>
+          <div className="history-detail-wide"><dt>URLs</dt><dd className="history-copyable">{row.urls?.length ? row.urls.join("\n") : "—"}</dd></div>
+        </dl>
+      </div>
+    </div>
+  );
+}
+
+export function HistorySidebar({ model, actions }: HistoryViewProps): ReactElement {
+  return (
+    <div aria-label="Verlaufsfilter" className="history-sidebar" data-visual-region="history-sidebar">
+      <strong className="history-sidebar-heading">Verlauf</strong>
+      <div className="history-filter-list">
+        {filterItems.map((item) => (
+          <button
+            aria-current={model.filter === item.id ? "page" : undefined}
+            className={`history-filter${model.filter === item.id ? " is-active" : ""}`}
+            key={item.id}
+            onClick={() => actions.onFilterChange(item.id)}
+            type="button"
+          >
+            <span>{item.label}</span>
+            <span>{model.counts[item.id]}</span>
+          </button>
+        ))}
+      </div>
+      <button
+        className="history-sidebar-clear"
+        disabled={model.totalCount === 0 || model.loading}
+        onClick={actions.onClearHistory}
+        type="button"
+      >Verlauf leeren</button>
+    </div>
+  );
+}
+
+export function HistoryToolbar({ model, actions }: HistoryViewProps): ReactElement {
+  const selectedIds = model.selectedIds;
+  const selectedSet = new Set(selectedIds);
+  const restorable = model.rows.some((row) => selectedSet.has(row.id) && (row.urls?.length ?? 0) > 0);
+  return (
+    <Toolbar className="history-workspace-toolbar" data-visual-region="history-toolbar" label="Verlaufsaktionen">
+      <ToolbarGroup label="Einträge">
+        <button className="history-action" disabled={selectedIds.length === 0 || !restorable} onClick={() => actions.onRestore(selectedIds)} type="button">Erneut hinzufügen</button>
+        <button className="history-action" disabled={selectedIds.length !== 1} onClick={() => actions.onReveal(selectedIds[0])} type="button">Im Ordner zeigen</button>
+        <button className="history-action history-action-danger" disabled={selectedIds.length === 0} onClick={() => actions.onRemove(selectedIds)} type="button">Entfernen</button>
+        <button className="history-action" disabled={selectedIds.length === 0} onClick={actions.onClearSelection} type="button">Auswahl löschen</button>
+      </ToolbarGroup>
+      <ToolbarSearch
+        label="Verlauf durchsuchen"
+        onChange={(event: ChangeEvent<HTMLInputElement>) => actions.onQueryChange(event.target.value)}
+        placeholder="Name, Pfad, Hoster oder Provider"
+        value={model.query}
+      />
+    </Toolbar>
+  );
+}
+
+export function HistoryContent({ model, actions }: HistoryViewProps): ReactElement {
+  const selected = new Set(model.selectedIds);
+  const expanded = new Set(model.expandedIds);
+  const visibleIds = model.rows.map((row) => row.id);
+  const allVisibleSelected = visibleIds.length > 0 && visibleIds.every((id) => selected.has(id));
+  const showEmpty = !model.loading && !model.error && model.rows.length === 0;
+  const emptyTitle = model.totalCount === 0 && !model.query && model.filter === "all"
+    ? "Noch kein Verlauf"
+    : "Keine passenden Einträge";
+
+  return (
+    <section aria-label="Verlaufstabelle" className="history-content">
+      <DataTable className="history-table" label="Verlauf">
+        <DataTableHeader className="history-table-header">
+          <div className="history-table-header-row" role="row">
+            <span className="history-column-select" role="columnheader">
+              <input
+                aria-label="Alle sichtbaren Einträge auswählen"
+                checked={allVisibleSelected}
+                disabled={visibleIds.length === 0}
+                onChange={() => actions.onToggleSelectAll(visibleIds)}
+                type="checkbox"
+              />
+            </span>
+            <span role="columnheader">Paket / Datei</span>
+            <span role="columnheader">Status</span>
+            <span role="columnheader">Größe</span>
+            <span role="columnheader">Hoster</span>
+            <span role="columnheader">Gestartet</span>
+            <span role="columnheader">Beendet</span>
+            <span role="columnheader">Aktion</span>
+          </div>
+        </DataTableHeader>
+        <DataTableBody className="history-table-body" data-visual-region="history-table-body">
+          {model.loading ? (
+            <DataTableEmpty description="Die gespeicherten Einträge werden geladen." title="Verlauf wird geladen" />
+          ) : model.error ? (
+            <DataTableEmpty className="history-table-error" description="Öffne die Ansicht erneut, um es noch einmal zu versuchen." title={model.error} />
+          ) : showEmpty ? (
+            <DataTableEmpty description={emptyTitle === "Noch kein Verlauf" ? "Abgeschlossene und gelöschte Pakete erscheinen hier." : "Passe Filter oder Suche an."} title={emptyTitle} />
+          ) : (
+            model.rows.map((row) => {
+              const isSelected = selected.has(row.id);
+              const isExpanded = expanded.has(row.id);
+              const onContextMenu = (event: MouseEvent<HTMLElement>): void => {
+                event.preventDefault();
+                event.stopPropagation();
+                event.currentTarget.querySelector<HTMLButtonElement>(".history-row-action button")?.focus({ preventScroll: true });
+                actions.onContextMenu(row.id, event.clientX, event.clientY);
+              };
+              return (
+                <div className="history-row-group" key={row.id}>
+                  <div
+                    className={`history-row${isSelected ? " is-selected" : ""}`}
+                    data-history-row-id={row.id}
+                    onContextMenu={onContextMenu}
+                    role="row"
+                  >
+                    <span className="history-column-select" role="cell">
+                      <input
+                        aria-label={`${row.name} auswählen`}
+                        checked={isSelected}
+                        onChange={() => actions.onToggleSelection(row.id)}
+                        type="checkbox"
+                      />
+                    </span>
+                    <span className="history-row-name" role="cell">
+                      <button
+                        aria-expanded={isExpanded}
+                        aria-label={isExpanded ? "Details ausblenden" : "Details anzeigen"}
+                        className="history-expand"
+                        onClick={(event) => {
+                          event.stopPropagation();
+                          actions.onToggleExpansion(row.id);
+                        }}
+                        type="button"
+                      >{isExpanded ? "−" : "+"}</button>
+                      <span title={row.name}>{row.name}</span>
+                    </span>
+                    <span role="cell"><span className={`history-status history-status-${row.status}`}>{row.statusLabel}</span></span>
+                    <span className="history-row-size" role="cell" title={row.sizeLabel}>{row.sizeLabel}</span>
+                    <span className="history-row-hoster" role="cell" title={row.hoster}>{row.hoster}</span>
+                    <span className="history-row-time" role="cell">{row.startedLabel}</span>
+                    <span className="history-row-time" role="cell">{row.completedLabel}</span>
+                    <span className="history-row-action" role="cell">
+                      <button
+                        aria-label={`Aktionen für ${row.name}`}
+                        onClick={(event) => {
+                          const rect = event.currentTarget.getBoundingClientRect();
+                          actions.onContextMenu(row.id, rect.right, rect.bottom);
+                        }}
+                        type="button"
+                      >•••</button>
+                    </span>
+                  </div>
+                  {isExpanded ? <HistoryRowDetails row={row} /> : null}
+                </div>
+              );
+            })
+          )}
+        </DataTableBody>
+      </DataTable>
+    </section>
+  );
+}
+
+export function HistoryFooter({ model }: Pick<HistoryViewProps, "model">): ReactElement {
+  const count = model.rows.length;
+  return (
+    <DataTableFooter
+      className="history-pagination"
+      data-visual-region="history-pagination"
+      pageSize={count}
+      paginationVisible
+      rangeLabel={count === 0 ? "0 von 0" : `1–${count} von ${count}`}
+    />
+  );
+}
+
+export function HistoryView({ model, actions }: HistoryViewProps): ReactElement {
+  return (
+    <div className="history-workspace-view">
+      <HistorySidebar actions={actions} model={model} />
+      <div className="history-view-main">
+        <HistoryToolbar actions={actions} model={model} />
+        <HistoryContent actions={actions} model={model} />
+        <HistoryFooter model={model} />
+      </div>
+    </div>
+  );
+}

src/renderer/views/history/history-model.ts

@@ -0,0 +1,254 @@
+import type { DebridProvider, HistoryEntry } from "../../../shared/types";
+
+export type HistoryFilter = "all" | "today" | "week" | "older" | "completed" | "deleted" | "failed";
+export type HistoryViewStatus = HistoryEntry["status"] | "failed";
+export type HistoryViewEntry = Omit<HistoryEntry, "status"> & { status: HistoryViewStatus };
+
+export interface HistoryRow extends HistoryViewEntry {
+  hoster: string;
+  providerLabel: string;
+  startAt: number;
+  sizeLabel: string;
+  startedLabel: string;
+  completedLabel: string;
+  durationLabel: string;
+  averageSpeedLabel: string;
+  statusLabel: string;
+}
+
+export interface HistoryFilterCounts {
+  all: number;
+  today: number;
+  week: number;
+  older: number;
+  completed: number;
+  deleted: number;
+  failed: number;
+}
+
+export interface HistoryViewModel {
+  rows: HistoryRow[];
+  filter: HistoryFilter;
+  query: string;
+  selectedIds: string[];
+  expandedIds: string[];
+  counts: HistoryFilterCounts;
+  loading: boolean;
+  error: string;
+  totalCount: number;
+}
+
+const providerLabels: Record<DebridProvider, string> = {
+  realdebrid: "Real-Debrid",
+  megadebrid: "Mega-Debrid",
+  "megadebrid-api": "Mega-Debrid API",
+  "megadebrid-web": "Mega-Debrid Web",
+  bestdebrid: "BestDebrid",
+  alldebrid: "AllDebrid",
+  ddownload: "DDownload",
+  onefichier: "1Fichier",
+  debridlink: "Debrid-Link",
+  linksnappy: "LinkSnappy"
+};
+
+const statusLabels: Record<HistoryViewStatus, string> = {
+  completed: "Abgeschlossen",
+  deleted: "Gelöscht",
+  failed: "Fehlgeschlagen"
+};
+
+const numberFormatter = new Intl.NumberFormat("de-DE", { maximumFractionDigits: 1 });
+const dateFormatter = new Intl.DateTimeFormat("de-DE", {
+  day: "2-digit",
+  month: "2-digit",
+  year: "numeric",
+  hour: "2-digit",
+  minute: "2-digit"
+});
+
+function formatBytes(bytes: number): string {
+  const safe = Math.max(0, Number.isFinite(bytes) ? bytes : 0);
+  if (safe < 1024) {
+    return `${Math.round(safe)} B`;
+  }
+  const units = ["KB", "MB", "GB", "TB", "PB"];
+  let value = safe / 1024;
+  let unitIndex = 0;
+  while (value >= 1024 && unitIndex < units.length - 1) {
+    value /= 1024;
+    unitIndex += 1;
+  }
+  return `${numberFormatter.format(value)} ${units[unitIndex]}`;
+}
+
+function formatDuration(durationSeconds: number): string {
+  const total = Math.max(0, Math.floor(Number.isFinite(durationSeconds) ? durationSeconds : 0));
+  const hours = Math.floor(total / 3600);
+  const minutes = Math.floor((total % 3600) / 60);
+  const seconds = total % 60;
+  if (hours > 0) {
+    return `${hours}:${String(minutes).padStart(2, "0")}:${String(seconds).padStart(2, "0")}`;
+  }
+  return `${minutes}:${String(seconds).padStart(2, "0")}`;
+}
+
+function localDayStart(timestamp: number): number {
+  const date = new Date(timestamp);
+  date.setHours(0, 0, 0, 0);
+  return date.getTime();
+}
+
+function matchesTemporalFilter(entry: HistoryViewEntry, filter: HistoryFilter, now: number): boolean {
+  if (filter === "completed" || filter === "deleted" || filter === "failed") {
+    return entry.status === filter;
+  }
+  if (filter === "all") {
+    return true;
+  }
+  const todayStart = localDayStart(now);
+  const tomorrowStartDate = new Date(todayStart);
+  tomorrowStartDate.setDate(tomorrowStartDate.getDate() + 1);
+  const tomorrowStart = tomorrowStartDate.getTime();
+  const weekStartDate = new Date(todayStart);
+  weekStartDate.setDate(weekStartDate.getDate() - 6);
+  const weekStart = weekStartDate.getTime();
+  if (filter === "today") {
+    return entry.completedAt >= todayStart && entry.completedAt < tomorrowStart;
+  }
+  if (filter === "week") {
+    return entry.completedAt >= weekStart && entry.completedAt < todayStart;
+  }
+  return entry.completedAt < weekStart;
+}
+
+function normalizeSearch(value: string): string {
+  return value.trim().toLocaleLowerCase("de-DE");
+}
+
+export function deriveHistoryHoster(urls: string[] | undefined): string {
+  const hostnames: string[] = [];
+  const seen = new Set<string>();
+  for (const raw of urls ?? []) {
+    try {
+      const url = new URL(raw);
+      if (url.protocol !== "http:" && url.protocol !== "https:") {
+        continue;
+      }
+      const hostname = url.hostname.toLocaleLowerCase("de-DE");
+      if (!hostname || seen.has(hostname)) {
+        continue;
+      }
+      seen.add(hostname);
+      hostnames.push(hostname);
+    } catch {
+      continue;
+    }
+  }
+  return hostnames.length > 0 ? hostnames.join(", ") : "—";
+}
+
+export function deriveHistoryStartAt(entry: Pick<HistoryViewEntry, "completedAt" | "durationSeconds">): number {
+  const completedAt = Math.max(0, Number.isFinite(entry.completedAt) ? entry.completedAt : 0);
+  const durationMs = Math.max(0, Number.isFinite(entry.durationSeconds) ? entry.durationSeconds : 0) * 1000;
+  return Math.max(0, completedAt - durationMs);
+}
+
+function toHistoryRow(entry: HistoryViewEntry): HistoryRow {
+  const hoster = deriveHistoryHoster(entry.urls);
+  const providerLabel = entry.provider ? providerLabels[entry.provider] : "—";
+  const startAt = deriveHistoryStartAt(entry);
+  const durationSeconds = Math.max(0, entry.durationSeconds || 0);
+  const averageBytesPerSecond = durationSeconds > 0 ? entry.downloadedBytes / durationSeconds : 0;
+  return {
+    ...entry,
+    hoster,
+    providerLabel,
+    startAt,
+    sizeLabel: `${formatBytes(entry.downloadedBytes)} / ${formatBytes(entry.totalBytes)}`,
+    startedLabel: dateFormatter.format(new Date(startAt)),
+    completedLabel: dateFormatter.format(new Date(Math.max(0, entry.completedAt))),
+    durationLabel: formatDuration(durationSeconds),
+    averageSpeedLabel: durationSeconds > 0 ? `${formatBytes(averageBytesPerSecond)}/s` : "—",
+    statusLabel: statusLabels[entry.status]
+  };
+}
+
+export function filterHistoryRows(
+  entries: HistoryViewEntry[],
+  filter: HistoryFilter,
+  query: string,
+  now = Date.now()
+): HistoryRow[] {
+  const normalizedQuery = normalizeSearch(query);
+  return entries
+    .filter((entry) => matchesTemporalFilter(entry, filter, now))
+    .map(toHistoryRow)
+    .filter((row) => {
+      if (!normalizedQuery) {
+        return true;
+      }
+      const searchable = [
+        row.name,
+        row.outputDir,
+        row.hoster,
+        row.providerLabel,
+        ...(row.urls ?? [])
+      ].join("\n").toLocaleLowerCase("de-DE");
+      return searchable.includes(normalizedQuery);
+    });
+}
+
+function countHistoryFilters(entries: HistoryViewEntry[], now: number): HistoryFilterCounts {
+  return {
+    all: entries.length,
+    today: entries.filter((entry) => matchesTemporalFilter(entry, "today", now)).length,
+    week: entries.filter((entry) => matchesTemporalFilter(entry, "week", now)).length,
+    older: entries.filter((entry) => matchesTemporalFilter(entry, "older", now)).length,
+    completed: entries.filter((entry) => entry.status === "completed").length,
+    deleted: entries.filter((entry) => entry.status === "deleted").length,
+    failed: entries.filter((entry) => entry.status === "failed").length
+  };
+}
+
+export function buildHistoryViewModel(
+  entries: HistoryViewEntry[],
+  filter: HistoryFilter,
+  query: string,
+  selectedIds: Iterable<string>,
+  expandedIds: Iterable<string>,
+  loading: boolean,
+  error: string,
+  now = Date.now()
+): HistoryViewModel {
+  const rows = filterHistoryRows(entries, filter, query, now);
+  const visibleIds = new Set(rows.map((row) => row.id));
+  return {
+    rows,
+    filter,
+    query,
+    selectedIds: [...selectedIds].filter((id) => visibleIds.has(id)),
+    expandedIds: [...expandedIds],
+    counts: countHistoryFilters(entries, now),
+    loading,
+    error,
+    totalCount: entries.length
+  };
+}
+
+export function pruneHistoryIds(current: Set<string>, availableIds: Iterable<string>): Set<string> {
+  if (current.size === 0) {
+    return current;
+  }
+  const available = new Set(availableIds);
+  const next = new Set<string>();
+  for (const id of current) {
+    if (available.has(id)) {
+      next.add(id);
+    }
+  }
+  return next.size === current.size ? current : next;
+}
+
+export function selectVisibleHistoryIds(visibleIds: Iterable<string>): Set<string> {
+  return new Set(visibleIds);
+}

src/renderer/views/history/history.css

@@ -0,0 +1,366 @@
+.history-workspace-view {
+  display: grid;
+  grid-template-columns: 270px minmax(0, 1fr);
+  min-width: 0;
+  min-height: 520px;
+  overflow: hidden;
+}
+
+.history-view-main {
+  display: grid;
+  grid-template-rows: auto minmax(0, 1fr) 60px;
+  min-width: 0;
+}
+
+.history-sidebar {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  min-width: 0;
+  min-height: 100%;
+  padding: 12px;
+}
+
+.history-sidebar-heading {
+  color: var(--ui-text-secondary);
+  font-size: 13px;
+  line-height: 28px;
+}
+
+.history-filter-list {
+  display: flex;
+  flex: 1;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.history-filter,
+.history-sidebar-clear,
+.history-action {
+  align-items: center;
+  background: transparent;
+  border: 1px solid transparent;
+  border-radius: 6px;
+  color: var(--ui-text-secondary);
+  display: flex;
+  font: inherit;
+  height: 36px;
+}
+
+.history-filter {
+  justify-content: space-between;
+  padding: 0 10px;
+  text-align: left;
+  width: 100%;
+}
+
+.history-filter span:last-child {
+  color: var(--ui-text-muted);
+  font-variant-numeric: tabular-nums;
+}
+
+.history-filter:hover,
+.history-sidebar-clear:hover:not(:disabled),
+.history-action:hover:not(:disabled) {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.history-filter.is-active {
+  background: var(--ui-active);
+  border-color: var(--ui-border);
+  color: var(--ui-text);
+}
+
+.history-sidebar-clear {
+  border-color: var(--ui-border);
+  justify-content: flex-start;
+  padding: 0 10px;
+  width: 100%;
+}
+
+.history-sidebar-clear:disabled,
+.history-action:disabled {
+  cursor: default;
+  opacity: 0.45;
+}
+
+.history-sidebar,
+.history-workspace-toolbar,
+.history-content,
+.history-pagination {
+  user-select: none;
+}
+
+.history-workspace-toolbar {
+  min-width: 0;
+  width: 100%;
+}
+
+.history-workspace-toolbar .ui-toolbar-search-input {
+  user-select: text;
+}
+
+.history-action {
+  background: var(--ui-input);
+  border-color: var(--ui-border);
+  padding: 0 12px;
+  white-space: nowrap;
+}
+
+.history-action-danger:not(:disabled) {
+  border-color: color-mix(in srgb, var(--ui-danger) 70%, var(--ui-border));
+  color: var(--ui-danger);
+}
+
+.history-content {
+  height: 100%;
+  min-height: 0;
+  min-width: 0;
+  overflow: hidden;
+}
+
+.history-content .history-table {
+  height: 100%;
+  overflow: auto;
+}
+
+.history-table-header-row,
+.history-row {
+  align-items: center;
+  display: grid;
+  grid-template-columns: 48px minmax(190px, 1.45fr) minmax(112px, 0.75fr) minmax(150px, 1fr) minmax(130px, 0.9fr) minmax(135px, 0.9fr) minmax(135px, 0.9fr) 72px;
+  min-width: 1080px;
+}
+
+.history-table > .history-table-header {
+  height: 41px;
+  position: sticky;
+  top: 0;
+  z-index: 1;
+}
+
+.history-table-header-row {
+  color: var(--ui-text-muted);
+  font-size: 11px;
+  font-weight: 700;
+  height: 41px;
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+}
+
+.history-table-header-row > span,
+.history-row > span {
+  min-width: 0;
+  padding: 0 10px;
+}
+
+.history-table > .history-table-body {
+  overflow: visible;
+}
+
+.history-row-group {
+  min-width: 1080px;
+}
+
+.history-row {
+  border-bottom: 1px solid var(--ui-border);
+  color: var(--ui-text-secondary);
+  height: 48px;
+}
+
+.history-row:hover {
+  background: var(--ui-hover);
+}
+
+.history-row.is-selected {
+  background: var(--ui-active);
+}
+
+.history-column-select {
+  display: grid;
+  place-items: center;
+}
+
+.history-row-name {
+  align-items: center;
+  color: var(--ui-text);
+  display: flex;
+  font-weight: 600;
+  gap: 8px;
+  overflow: hidden;
+}
+
+.history-row-name > span {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.history-expand,
+.history-row-action button {
+  background: transparent;
+  border: 1px solid transparent;
+  border-radius: 4px;
+  color: var(--ui-text-secondary);
+  flex: 0 0 auto;
+  font: inherit;
+  height: 28px;
+}
+
+.history-expand {
+  width: 28px;
+}
+
+.history-row-action button {
+  width: 36px;
+}
+
+.history-expand:hover,
+.history-row-action button:hover {
+  background: var(--ui-hover);
+  border-color: var(--ui-border);
+  color: var(--ui-text);
+}
+
+.history-status {
+  border: 1px solid var(--ui-border);
+  border-radius: 999px;
+  display: inline-flex;
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 22px;
+  max-width: 100%;
+  overflow: hidden;
+  padding: 0 8px;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.history-status-completed {
+  background: color-mix(in srgb, var(--ui-success) 16%, transparent);
+  border-color: color-mix(in srgb, var(--ui-success) 60%, var(--ui-border));
+  color: var(--ui-success);
+}
+
+.history-status-deleted {
+  background: color-mix(in srgb, var(--ui-warning) 15%, transparent);
+  border-color: color-mix(in srgb, var(--ui-warning) 60%, var(--ui-border));
+  color: var(--ui-warning);
+}
+
+.history-status-failed {
+  background: color-mix(in srgb, var(--ui-danger) 15%, transparent);
+  border-color: color-mix(in srgb, var(--ui-danger) 60%, var(--ui-border));
+  color: var(--ui-danger);
+}
+
+.history-row-size,
+.history-row-hoster,
+.history-row-time {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.history-row-size,
+.history-row-time {
+  font-variant-numeric: tabular-nums;
+}
+
+.history-row-action {
+  display: grid;
+  place-items: center;
+}
+
+.history-detail-row {
+  border-bottom: 1px solid var(--ui-border);
+  background: var(--ui-input);
+  min-width: 1080px;
+}
+
+.history-detail-cell {
+  padding: 14px 48px;
+}
+
+.history-details-grid {
+  display: grid;
+  gap: 12px 24px;
+  grid-template-columns: repeat(4, minmax(120px, 1fr));
+  margin: 0;
+}
+
+.history-details-grid > div {
+  display: grid;
+  gap: 4px;
+  min-width: 0;
+}
+
+.history-details-grid dt {
+  color: var(--ui-text-muted);
+  font-size: 11px;
+  font-weight: 700;
+  text-transform: uppercase;
+}
+
+.history-details-grid dd {
+  color: var(--ui-text-secondary);
+  margin: 0;
+  min-width: 0;
+}
+
+.history-details-grid .history-detail-wide {
+  grid-column: span 2;
+}
+
+.history-copyable {
+  overflow-wrap: anywhere;
+  user-select: text;
+  white-space: pre-wrap;
+}
+
+.history-table-error .ui-data-table-empty-title {
+  color: var(--ui-danger);
+}
+
+.history-pagination {
+  height: 60px;
+}
+
+@media (max-width: 1366px) {
+  .history-workspace-view {
+    grid-template-columns: 56px minmax(0, 1fr);
+  }
+
+  .history-sidebar {
+    overflow: hidden;
+  }
+
+  .history-action {
+    padding: 0 9px;
+  }
+
+  .history-table-header-row,
+  .history-row {
+    grid-template-columns: 44px minmax(170px, 1.25fr) minmax(108px, 0.7fr) minmax(140px, 0.9fr) minmax(120px, 0.8fr) minmax(125px, 0.8fr) minmax(125px, 0.8fr) 64px;
+    min-width: 996px;
+  }
+
+  .history-row-group,
+  .history-detail-row {
+    min-width: 996px;
+  }
+}
+
+@media (max-width: 1120px) {
+  .history-table-header-row,
+  .history-row {
+    grid-template-columns: 44px minmax(154px, 1.2fr) minmax(102px, 0.7fr) minmax(128px, 0.9fr) minmax(112px, 0.8fr) minmax(116px, 0.8fr) minmax(116px, 0.8fr) 60px;
+    min-width: 932px;
+  }
+
+  .history-row-group,
+  .history-detail-row {
+    min-width: 932px;
+  }
+}

src/renderer/views/settings/AccountWorkspace.tsx

@@ -0,0 +1,585 @@
+import {
+  cloneElement,
+  type ChangeEvent,
+  type DragEvent,
+  type KeyboardEvent,
+  type MouseEvent,
+  type ReactElement,
+  type UIEvent
+} from "react";
+import {
+  DataTable,
+  DataTableBody,
+  DataTableEmpty,
+  DataTableHeader
+} from "../../ui/DataTable";
+import { Dialog } from "../../ui/Dialog";
+import {
+  ACCOUNT_COLUMNS,
+  type AccountAddFilter,
+  type AccountAddOption,
+  type AccountRowViewModel
+} from "./settings-model";
+
+export type AccountWorkspacePanel = "overview" | "rules";
+
+export interface AccountRulesViewModel {
+  providerOrder: readonly string[];
+  routing: readonly string[];
+  autoFallback: boolean;
+  rememberCredentials?: boolean;
+  rotationEvents?: readonly { id: string; title: string; detail: string }[];
+  routingEntries?: readonly {
+    hosterId: string;
+    hosterLabel: string;
+    provider: string;
+    providers: readonly { value: string; label: string }[];
+  }[];
+  availableRoutingHosters?: readonly { value: string; label: string }[];
+}
+
+export interface AccountWorkspaceViewModel {
+  activePanel: AccountWorkspacePanel;
+  rows: readonly AccountRowViewModel[];
+  selectedIds: readonly string[];
+  busy: boolean;
+  error?: string;
+  allEnabled?: boolean;
+  statusSort?: "none" | "desc" | "asc";
+  rules: AccountRulesViewModel;
+}
+
+export interface AccountWorkspaceActions {
+  onPanelChange: (panel: AccountWorkspacePanel) => void;
+  onSelect: (rowId: string) => void;
+  onToggleEnabled: (rowId: string) => void;
+  onEdit: (rowId: string) => void;
+  onContextMenu: (rowId: string, x: number, y: number) => void;
+  onAdd: () => void;
+  onRemoveSelected: () => void;
+  onCheckAll: () => void;
+  onSetAllEnabled?: (enabled: boolean) => void;
+  onStatusSort?: () => void;
+  onMoveProvider?: (index: number, direction: -1 | 1) => void;
+  onProviderDragStart?: (event: DragEvent<HTMLElement>, index: number) => void;
+  onProviderDragOver?: (event: DragEvent<HTMLElement>, index: number) => void;
+  onProviderDrop?: (event: DragEvent<HTMLElement>, index: number) => void;
+  onProviderDragEnd?: () => void;
+  onToggleAutoFallback?: (enabled: boolean) => void;
+  onToggleRememberCredentials?: (enabled: boolean) => void;
+  onRoutingProviderChange?: (hosterId: string, provider: string) => void;
+  onRoutingRemove?: (hosterId: string) => void;
+  onRoutingAdd?: (hosterId: string) => void;
+}
+
+export interface AccountWorkspaceProps {
+  model: AccountWorkspaceViewModel;
+  actions: AccountWorkspaceActions;
+}
+
+export interface AccountDialogField {
+  id: string;
+  label: string;
+  type: "text" | "password" | "number" | "textarea";
+  value: string;
+  placeholder?: string;
+  help?: string;
+}
+
+export interface AccountAddDialogModel {
+  open: boolean;
+  query: string;
+  filter: AccountAddFilter;
+  options: readonly AccountAddOption[];
+  selectedOptionId: string | null;
+  fields: readonly AccountDialogField[];
+  error: string;
+  busy: boolean;
+}
+
+export interface AccountAddDialogActions {
+  onQueryChange: (value: string) => void;
+  onFilterChange: (filter: AccountAddFilter) => void;
+  onOptionSelect: (optionId: string) => void;
+  onFieldChange: (fieldId: string, value: string) => void;
+  onClose: () => void;
+  onSubmit: () => void;
+}
+
+export interface AccountEditDialogModel {
+  open: boolean;
+  hoster: string;
+  mode: string;
+  identity: string;
+  enabled: boolean;
+  fields: readonly AccountDialogField[];
+  error: string;
+  busy: boolean;
+}
+
+export interface AccountEditDialogActions {
+  onFieldChange: (fieldId: string, value: string) => void;
+  onClose: () => void;
+  onCheck: () => void;
+  onSave: () => void;
+  onRemove: () => void;
+  onToggleEnabled: () => void;
+}
+
+function AccountDialogFields({
+  fields,
+  onChange
+}: {
+  fields: readonly AccountDialogField[];
+  onChange: (fieldId: string, value: string) => void;
+}): ReactElement {
+  return (
+    <div className="settings-account-dialog-fields">
+      {fields.map((field) => (
+        <label className="settings-account-dialog-field" key={field.id}>
+          <span>{field.label}</span>
+          {field.type === "textarea" ? (
+            <textarea
+              className="settings-control settings-account-dialog-textarea"
+              onChange={(event) => onChange(field.id, event.target.value)}
+              placeholder={field.placeholder}
+              rows={4}
+              value={field.value}
+            />
+          ) : (
+            <input
+              autoComplete={field.type === "password" ? "off" : undefined}
+              className="settings-control"
+              inputMode={field.type === "number" ? "decimal" : undefined}
+              onChange={(event) => onChange(field.id, event.target.value)}
+              placeholder={field.placeholder}
+              type={field.type}
+              value={field.value}
+            />
+          )}
+          {field.help ? <span className="settings-field-help">{field.help}</span> : null}
+        </label>
+      ))}
+    </div>
+  );
+}
+
+function AccountRow({
+  row,
+  selected,
+  busy,
+  actions
+}: {
+  row: AccountRowViewModel;
+  selected: boolean;
+  busy: boolean;
+  actions: AccountWorkspaceActions;
+}): ReactElement {
+  const selectRow = (): void => actions.onSelect(row.id);
+  const onClick = (): void => selectRow();
+  const onKeyDown = (event: KeyboardEvent<HTMLDivElement>): void => {
+    if (event.target !== event.currentTarget || (event.key !== "Enter" && event.key !== " ")) {
+      return;
+    }
+    event.preventDefault();
+    selectRow();
+  };
+  const openContextMenu = (event: MouseEvent<HTMLElement>): void => {
+    event.preventDefault();
+    event.stopPropagation();
+    actions.onContextMenu(row.id, event.clientX, event.clientY);
+  };
+  return (
+    <div
+      aria-selected={selected}
+      className={`settings-account-row${selected ? " is-selected" : ""}${row.problem ? " has-problem" : ""}${!row.enabled ? " is-disabled" : ""}`}
+      onClick={onClick}
+      onContextMenu={openContextMenu}
+      onDoubleClick={() => actions.onEdit(row.id)}
+      onKeyDown={onKeyDown}
+      role="row"
+      tabIndex={0}
+    >
+      <span className="settings-account-column-enable" role="cell">
+        <input
+          aria-label={`${row.hoster} ${row.enabled ? "deaktivieren" : "aktivieren"}`}
+          checked={row.enabled}
+          disabled={busy}
+          onChange={() => actions.onToggleEnabled(row.id)}
+          onClick={(event) => event.stopPropagation()}
+          type="checkbox"
+        />
+      </span>
+      <span className="settings-account-hoster" role="cell" title={`${row.hoster} · ${row.mode}`}>
+        <img alt="" aria-hidden="true" draggable={false} height="20" src={row.icon} width="20" />
+        <span>
+          <strong>{row.hoster}</strong>
+          <small>{row.mode}</small>
+        </span>
+      </span>
+      <span className="settings-account-status" role="cell">
+        <span className={`settings-account-status-badge is-${row.status.tone}`}>{row.status.text}</span>
+      </span>
+      <span className="settings-account-traffic" role="cell">{row.traffic}</span>
+      <span className="settings-account-username settings-copyable" role="cell" title={row.username}>{row.username}</span>
+      <span className="settings-account-expires" role="cell">{row.expires}</span>
+      <span className="settings-account-credential" role="cell">{row.credential}</span>
+      <span className="settings-account-column-actions" role="cell">
+        <button
+          aria-label={`${row.hoster} Aktionen`}
+          className="settings-account-action-button"
+          disabled={busy}
+          onClick={(event) => {
+            event.stopPropagation();
+            const rect = event.currentTarget.getBoundingClientRect();
+            actions.onContextMenu(row.id, rect.right, rect.bottom);
+          }}
+          type="button"
+        >⋯</button>
+      </span>
+    </div>
+  );
+}
+
+function syncAccountTableScroll(event: UIEvent<HTMLDivElement>): void {
+  const header = event.currentTarget.parentElement?.querySelector<HTMLElement>(".settings-account-table-header");
+  if (header) {
+    header.scrollLeft = event.currentTarget.scrollLeft;
+  }
+}
+
+function AccountOverview({ model, actions }: AccountWorkspaceProps): ReactElement {
+  const selectedIds = new Set(model.selectedIds);
+  return (
+    <>
+      <DataTable className="settings-account-table" label="Accounts">
+        <DataTableHeader className="settings-account-table-header">
+          <div className="settings-account-table-grid" role="row">
+            <span aria-label="Aktiviert" className="settings-account-column-enable" role="columnheader" />
+            {ACCOUNT_COLUMNS.map((column) => (
+              <span key={column} role="columnheader">
+                {column === "Status" && actions.onStatusSort ? (
+                  <button className="settings-account-sort" onClick={actions.onStatusSort} type="button">
+                    {column}{model.statusSort === "desc" ? " ▼" : model.statusSort === "asc" ? " ▲" : ""}
+                  </button>
+                ) : column}
+              </span>
+            ))}
+            <span aria-label="Aktionen" className="settings-account-column-actions" role="columnheader" />
+          </div>
+        </DataTableHeader>
+        <DataTableBody className="settings-account-table-body" data-visual-region="accounts-table-body" onScroll={syncAccountTableScroll}>
+          {model.busy && model.rows.length === 0 ? (
+            <DataTableEmpty description="Die Accountdaten werden aktualisiert." title="Accounts werden geladen" />
+          ) : model.error ? (
+            <DataTableEmpty className="settings-account-table-error" description="Die gespeicherten Accounts bleiben unverändert." title={model.error} />
+          ) : model.rows.length === 0 ? (
+            <DataTableEmpty description="Füge einen Account hinzu, um Downloads über einen Anbieter zu starten." title="Noch keine Accounts" />
+          ) : model.rows.map((row) => cloneElement(
+            AccountRow({ actions, busy: model.busy, row, selected: selectedIds.has(row.id) }),
+            { key: row.id }
+          ))}
+        </DataTableBody>
+      </DataTable>
+      <div className="settings-account-local-actions">
+        <div>
+          <button className="settings-button settings-button-secondary" disabled={model.busy} onClick={actions.onAdd} type="button">＋ Hinzufügen</button>
+          <button className="settings-button settings-button-secondary" disabled={model.busy || model.selectedIds.length === 0} onClick={actions.onRemoveSelected} type="button">− Entfernen</button>
+          <button className="settings-button settings-button-secondary" disabled={model.busy} onClick={actions.onCheckAll} type="button">↻ Aktualisieren</button>
+        </div>
+        <span>{model.rows.length} {model.rows.length === 1 ? "Account" : "Accounts"}</span>
+      </div>
+    </>
+  );
+}
+
+function AccountRules({ model, actions }: AccountWorkspaceProps): ReactElement {
+  return (
+    <div className="settings-account-rules">
+      <section className="settings-rule-section">
+        <h3>Provider-Reihenfolge</h3>
+        <p>Lege fest, in welcher Reihenfolge verfügbare Provider verwendet werden.</p>
+        {model.rules.providerOrder.length === 0 ? (
+          <span className="settings-rule-empty">Keine Provider konfiguriert.</span>
+        ) : (
+          <ol className="settings-provider-order">
+            {model.rules.providerOrder.map((provider, index) => (
+              <li
+                draggable={Boolean(actions.onProviderDragStart)}
+                key={`${provider}-${index}`}
+                onDragEnd={actions.onProviderDragEnd}
+                onDragOver={(event) => actions.onProviderDragOver?.(event, index)}
+                onDragStart={(event) => actions.onProviderDragStart?.(event, index)}
+                onDrop={(event) => actions.onProviderDrop?.(event, index)}
+              >
+                <span>{provider}</span>
+                {actions.onMoveProvider ? (
+                  <span className="settings-provider-order-actions">
+                    <button aria-label={`${provider} nach oben`} disabled={index === 0} onClick={() => actions.onMoveProvider?.(index, -1)} type="button">↑</button>
+                    <button aria-label={`${provider} nach unten`} disabled={index === model.rules.providerOrder.length - 1} onClick={() => actions.onMoveProvider?.(index, 1)} type="button">↓</button>
+                  </span>
+                ) : null}
+              </li>
+            ))}
+          </ol>
+        )}
+        <label className="settings-rule-toggle">
+          <input
+            checked={model.rules.autoFallback}
+            disabled={!actions.onToggleAutoFallback}
+            onChange={(event) => actions.onToggleAutoFallback?.(event.target.checked)}
+            type="checkbox"
+          />
+          <span>Automatischer Fallback</span>
+        </label>
+        {typeof model.rules.rememberCredentials === "boolean" ? (
+          <label className="settings-rule-toggle">
+            <input
+              checked={model.rules.rememberCredentials}
+              disabled={!actions.onToggleRememberCredentials}
+              onChange={(event) => actions.onToggleRememberCredentials?.(event.target.checked)}
+              type="checkbox"
+            />
+            <span>Zugangsdaten lokal speichern</span>
+          </label>
+        ) : null}
+      </section>
+      <section className="settings-rule-section">
+        <h3>Hoster-Routing</h3>
+        <p>Eigene Zuordnungen überschreiben für den jeweiligen Hoster die Standardreihenfolge.</p>
+        {model.rules.routingEntries ? (
+          <>
+            {model.rules.routingEntries.length === 0 ? <span className="settings-rule-empty">Keine eigenen Zuordnungen.</span> : (
+              <div className="settings-routing-editor">
+                {model.rules.routingEntries.map((entry) => (
+                  <div className="settings-routing-editor-row" key={entry.hosterId}>
+                    <span>{entry.hosterLabel}</span>
+                    <select
+                      aria-label={`Provider für ${entry.hosterLabel}`}
+                      className="settings-control"
+                      onChange={(event) => actions.onRoutingProviderChange?.(entry.hosterId, event.target.value)}
+                      value={entry.provider}
+                    >
+                      {entry.providers.map((provider) => <option key={provider.value} value={provider.value}>{provider.label}</option>)}
+                    </select>
+                    <button aria-label={`${entry.hosterLabel} Zuordnung entfernen`} className="settings-button settings-button-danger" onClick={() => actions.onRoutingRemove?.(entry.hosterId)} type="button">Entfernen</button>
+                  </div>
+                ))}
+              </div>
+            )}
+            {model.rules.availableRoutingHosters ? (
+              <select
+                aria-label="Hoster-Routing hinzufügen"
+                className="settings-control settings-routing-add"
+                onChange={(event) => {
+                  if (event.target.value) {
+                    actions.onRoutingAdd?.(event.target.value);
+                  }
+                  event.target.value = "";
+                }}
+                value=""
+              >
+                <option disabled value="">Hoster hinzufügen…</option>
+                {model.rules.availableRoutingHosters.map((hoster) => <option key={hoster.value} value={hoster.value}>{hoster.label}</option>)}
+                <option value="__custom">Eigener Hoster…</option>
+              </select>
+            ) : null}
+          </>
+        ) : model.rules.routing.length === 0 ? (
+          <span className="settings-rule-empty">Keine eigenen Zuordnungen.</span>
+        ) : (
+          <ul className="settings-routing-list">
+            {model.rules.routing.map((route, index) => <li className="settings-copyable" key={`${route}-${index}`}>{route}</li>)}
+          </ul>
+        )}
+      </section>
+      {model.rules.rotationEvents ? (
+        <section className="settings-rule-section">
+          <h3>Rotations-Verlauf</h3>
+          {model.rules.rotationEvents.length === 0 ? (
+            <span className="settings-rule-empty">Noch keine Rotations-Ereignisse.</span>
+          ) : model.rules.rotationEvents.map((event) => (
+            <div className="settings-rotation-event" key={event.id}>
+              <strong>{event.title}</strong>
+              <span>{event.detail}</span>
+            </div>
+          ))}
+        </section>
+      ) : null}
+    </div>
+  );
+}
+
+export function AccountWorkspace({ model, actions }: AccountWorkspaceProps): ReactElement {
+  return (
+    <div className="settings-account-workspace">
+      <header className="settings-account-heading">
+        <div>
+          <h2>Accountverwaltung</h2>
+          <p>Accounts hinzufügen, prüfen und verwalten.</p>
+        </div>
+        {typeof model.allEnabled === "boolean" && actions.onSetAllEnabled ? (
+          <label className="settings-rule-toggle settings-account-all-enabled">
+            <input
+              checked={model.allEnabled}
+              disabled={model.busy || model.rows.length === 0}
+              onChange={(event) => actions.onSetAllEnabled?.(event.target.checked)}
+              type="checkbox"
+            />
+            <span>Accounts zum Herunterladen verwenden</span>
+          </label>
+        ) : null}
+      </header>
+      <div aria-label="Accountverwaltung" className="settings-account-tabs" role="tablist">
+        <button
+          aria-controls="settings-account-overview"
+          aria-selected={model.activePanel === "overview"}
+          id="settings-account-overview-tab"
+          onClick={() => actions.onPanelChange("overview")}
+          role="tab"
+          type="button"
+        >Übersicht</button>
+        <button
+          aria-controls="settings-account-rules"
+          aria-selected={model.activePanel === "rules"}
+          id="settings-account-rules-tab"
+          onClick={() => actions.onPanelChange("rules")}
+          role="tab"
+          type="button"
+        >Verwendungsregeln</button>
+      </div>
+      <div
+        aria-labelledby="settings-account-overview-tab"
+        className="settings-account-panel"
+        hidden={model.activePanel !== "overview"}
+        id="settings-account-overview"
+        role="tabpanel"
+      >
+        {AccountOverview({ actions, model })}
+      </div>
+      <div
+        aria-labelledby="settings-account-rules-tab"
+        className="settings-account-panel"
+        hidden={model.activePanel !== "rules"}
+        id="settings-account-rules"
+        role="tabpanel"
+      >
+        {AccountRules({ actions, model })}
+      </div>
+    </div>
+  );
+}
+
+export function AccountAddDialog({
+  model,
+  actions
+}: {
+  model: AccountAddDialogModel;
+  actions: AccountAddDialogActions;
+}): ReactElement | null {
+  const onFilterChange = (event: ChangeEvent<HTMLSelectElement>): void => {
+    actions.onFilterChange(event.target.value as AccountAddFilter);
+  };
+  return (
+    <Dialog
+      actions={(
+        <>
+          <button className="settings-button settings-button-secondary" disabled={model.busy} onClick={actions.onClose} type="button">Abbrechen</button>
+          <button className="settings-button settings-button-primary" disabled={model.busy || !model.selectedOptionId} onClick={actions.onSubmit} type="button">Prüfen und speichern</button>
+        </>
+      )}
+      actionsClassName="settings-account-dialog-actions"
+      bodyClassName="settings-account-dialog-body"
+      description="Wähle einen Dienst und trage die passenden Zugangsdaten ein."
+      onClose={actions.onClose}
+      open={model.open}
+      size="account"
+      title="Account hinzufügen"
+    >
+      <div className="settings-account-picker-controls">
+        <input
+          aria-label="Accounts durchsuchen"
+          className="settings-control"
+          onChange={(event) => actions.onQueryChange(event.target.value)}
+          placeholder="Dienst oder Zugangstyp suchen"
+          type="search"
+          value={model.query}
+        />
+        <select aria-label="Account-Typ filtern" className="settings-control" onChange={onFilterChange} value={model.filter}>
+          <option value="all">Alle</option>
+          <option value="api">API</option>
+          <option value="web">Web</option>
+        </select>
+      </div>
+      <div aria-label="Verfügbare Account-Typen" className="settings-account-picker" role="listbox">
+        {model.options.length === 0 ? (
+          <span className="settings-account-picker-empty">Keine passenden Account-Typen.</span>
+        ) : model.options.map((option) => {
+          const selected = option.id === model.selectedOptionId;
+          return (
+            <div className="settings-account-picker-entry" key={option.id}>
+              <button
+                aria-selected={selected}
+                className={`settings-account-picker-row${selected ? " is-selected" : ""}`}
+                onClick={() => actions.onOptionSelect(option.id)}
+                role="option"
+                type="button"
+              >
+                <span>
+                  <strong>{option.title}</strong>
+                  <small>{option.description}</small>
+                </span>
+                <span>
+                  <strong>{option.mode}</strong>
+                  <small>{option.functionLabel}</small>
+                </span>
+              </button>
+              {selected ? <AccountDialogFields fields={model.fields} onChange={actions.onFieldChange} /> : null}
+            </div>
+          );
+        })}
+      </div>
+      {model.error ? <p className="settings-account-dialog-error" role="alert">{model.error}</p> : null}
+    </Dialog>
+  );
+}
+
+export function AccountEditDialog({
+  model,
+  actions
+}: {
+  model: AccountEditDialogModel;
+  actions: AccountEditDialogActions;
+}): ReactElement | null {
+  return (
+    <Dialog
+      actions={(
+        <>
+          <button className="settings-button settings-button-danger" disabled={model.busy} onClick={actions.onRemove} type="button">Entfernen</button>
+          <span className="settings-account-dialog-action-spacer" />
+          <button className="settings-button settings-button-secondary" disabled={model.busy} onClick={actions.onClose} type="button">Abbrechen</button>
+          <button className="settings-button settings-button-secondary" disabled={model.busy} onClick={actions.onCheck} type="button">Prüfen</button>
+          <button className="settings-button settings-button-primary" disabled={model.busy} onClick={actions.onSave} type="button">Speichern</button>
+        </>
+      )}
+      actionsClassName="settings-account-dialog-actions"
+      bodyClassName="settings-account-dialog-body"
+      description="Bearbeite ausschließlich den ausgewählten Account."
+      onClose={actions.onClose}
+      open={model.open}
+      size="account"
+      title="Account bearbeiten"
+    >
+      <div className="settings-account-edit-identity">
+        <span>{model.hoster} · {model.mode}</span>
+        <strong className="settings-copyable">{model.identity}</strong>
+      </div>
+      <label className="settings-rule-toggle settings-account-edit-enabled">
+        <input checked={model.enabled} disabled={model.busy} onChange={actions.onToggleEnabled} type="checkbox" />
+        <span>Account aktiviert</span>
+      </label>
+      <AccountDialogFields fields={model.fields} onChange={actions.onFieldChange} />
+      {model.error ? <p className="settings-account-dialog-error" role="alert">{model.error}</p> : null}
+    </Dialog>
+  );
+}

src/renderer/views/settings/SettingsForm.tsx

@@ -0,0 +1,177 @@
+import { cloneElement, type ChangeEvent, type ReactElement } from "react";
+import type {
+  SettingsFieldViewModel,
+  SettingsFormViewModel,
+  SettingsTextFieldViewModel
+} from "./settings-model";
+
+export interface SettingsFormActions {
+  onChange: (fieldId: string, value: string | boolean) => void;
+  onAction: (fieldId: string) => void;
+  onCommit?: (fieldId: string, value: string) => void;
+}
+
+export interface SettingsFormProps {
+  model: SettingsFormViewModel;
+  actions: SettingsFormActions;
+}
+
+function FieldHelp({ field }: { field: SettingsFieldViewModel }): ReactElement | null {
+  return field.help ? <span className="settings-field-help" id={`${field.id}-help`}>{field.help}</span> : null;
+}
+
+function TextControl({ field, actions }: { field: SettingsTextFieldViewModel; actions: SettingsFormActions }): ReactElement {
+  const describedBy = field.help ? `${field.id}-help` : undefined;
+  const onChange = (event: ChangeEvent<HTMLInputElement | HTMLTextAreaElement>): void => {
+    actions.onChange(field.id, event.target.value);
+  };
+  const control = field.kind === "textarea" ? (
+    <textarea
+      aria-describedby={describedBy}
+      className="settings-control settings-textarea"
+      disabled={field.disabled}
+      id={field.id}
+      onChange={onChange}
+      onBlur={field.commitOnBlur ? (event) => actions.onCommit?.(field.id, event.target.value) : undefined}
+      placeholder={field.placeholder}
+      rows={4}
+      value={field.value}
+    />
+  ) : (
+    <input
+      aria-describedby={describedBy}
+      className={`settings-control${field.kind === "path" ? " settings-copyable" : ""}`}
+      disabled={field.disabled}
+      id={field.id}
+      inputMode={field.inputMode}
+      max={field.max}
+      min={field.min}
+      onChange={onChange}
+      onBlur={field.commitOnBlur ? (event) => actions.onCommit?.(field.id, event.target.value) : undefined}
+      placeholder={field.placeholder}
+      step={field.step}
+      type={field.kind === "number" ? "number" : "text"}
+      value={field.value}
+    />
+  );
+  return (
+    <div className="settings-field">
+      <label htmlFor={field.id}>{field.label}</label>
+      {field.actionLabel ? (
+        <div className="settings-control-row">
+          {control}
+          <button
+            className="settings-button settings-button-secondary"
+            disabled={field.disabled}
+            onClick={() => actions.onAction(field.id)}
+            type="button"
+          >{field.actionLabel}</button>
+        </div>
+      ) : control}
+      <FieldHelp field={field} />
+    </div>
+  );
+}
+
+function SettingsField({ field, actions }: { field: SettingsFieldViewModel; actions: SettingsFormActions }): ReactElement {
+  if (field.kind === "text" || field.kind === "path" || field.kind === "number" || field.kind === "textarea") {
+    return <TextControl actions={actions} field={field} />;
+  }
+  if (field.kind === "select") {
+    return (
+      <div className="settings-field">
+        <label htmlFor={field.id}>{field.label}</label>
+        <select
+          aria-describedby={field.help ? `${field.id}-help` : undefined}
+          className="settings-control"
+          disabled={field.disabled}
+          id={field.id}
+          onChange={(event) => actions.onChange(field.id, event.target.value)}
+          value={field.value}
+        >
+          {field.options.map((option) => <option key={option.value} value={option.value}>{option.label}</option>)}
+        </select>
+        <FieldHelp field={field} />
+      </div>
+    );
+  }
+  if (field.kind === "theme") {
+    return (
+      <fieldset className="settings-field settings-theme-field" disabled={field.disabled}>
+        <legend>{field.label}</legend>
+        <div aria-describedby={field.help ? `${field.id}-help` : undefined} className="settings-theme-options" role="radiogroup">
+          {field.options.map((option) => (
+            <button
+              aria-checked={field.value === option.value}
+              className={`settings-theme-option${field.value === option.value ? " is-active" : ""}`}
+              key={option.value}
+              onClick={() => actions.onChange(field.id, option.value)}
+              role="radio"
+              type="button"
+            >
+              <span aria-hidden="true" className={`settings-theme-preview is-${option.value}`} />
+              <span>{option.label}</span>
+            </button>
+          ))}
+        </div>
+        <FieldHelp field={field} />
+      </fieldset>
+    );
+  }
+  if (field.kind === "switch") {
+    return (
+      <div className="settings-field settings-switch-field">
+        <div>
+          <span className="settings-switch-label" id={`${field.id}-label`}>{field.label}</span>
+          <FieldHelp field={field} />
+        </div>
+        <button
+          aria-checked={field.value}
+          aria-describedby={field.help ? `${field.id}-help` : undefined}
+          aria-labelledby={`${field.id}-label`}
+          className={`settings-switch${field.value ? " is-on" : ""}`}
+          disabled={field.disabled}
+          onClick={() => actions.onChange(field.id, !field.value)}
+          role="switch"
+          type="button"
+        ><span /></button>
+      </div>
+    );
+  }
+  return (
+    <div className="settings-field settings-action-field">
+      <div>
+        <span className="settings-switch-label">{field.label}</span>
+        <FieldHelp field={field} />
+      </div>
+      <button
+        className="settings-button settings-button-secondary"
+        disabled={field.disabled}
+        onClick={() => actions.onAction(field.id)}
+        type="button"
+      >{field.actionLabel}</button>
+    </div>
+  );
+}
+
+export function SettingsForm({ model, actions }: SettingsFormProps): ReactElement {
+  return (
+    <div className="settings-form-column">
+      <header className="settings-form-heading">
+        <h2>{model.title}</h2>
+        <p>{model.description}</p>
+      </header>
+      {model.groups.map((group) => (
+        <section className="settings-form-group" key={group.id}>
+          <header>
+            <h3>{group.title}</h3>
+            {group.description ? <p>{group.description}</p> : null}
+          </header>
+          <div className="settings-form-fields">
+            {group.fields.map((field) => cloneElement(SettingsField({ actions, field }), { key: field.id }))}
+          </div>
+        </section>
+      ))}
+    </div>
+  );
+}

src/renderer/views/settings/SettingsView.tsx

@@ -0,0 +1,99 @@
+import type { ReactElement } from "react";
+import {
+  SETTINGS_SECTIONS,
+  getSettingsSaveLabel,
+  type SettingsFormViewModel,
+  type SettingsSaveState,
+  type SettingsSection
+} from "./settings-model";
+import {
+  AccountWorkspace,
+  type AccountWorkspaceActions,
+  type AccountWorkspaceViewModel
+} from "./AccountWorkspace";
+import { SettingsForm, type SettingsFormActions } from "./SettingsForm";
+import "./settings.css";
+
+export type SettingsViewRegion = "all" | "sidebar" | "content";
+
+export interface SettingsViewModel {
+  section: SettingsSection;
+  saveState: SettingsSaveState;
+  form: SettingsFormViewModel;
+  accounts: AccountWorkspaceViewModel;
+}
+
+export interface SettingsViewActions {
+  onSectionChange: (section: SettingsSection) => void;
+  onSave: () => void;
+  form: SettingsFormActions;
+  accounts: AccountWorkspaceActions;
+}
+
+export interface SettingsViewProps {
+  model: SettingsViewModel;
+  actions: SettingsViewActions;
+  region?: SettingsViewRegion;
+}
+
+export function SettingsSidebar({ model, actions }: SettingsViewProps): ReactElement {
+  return (
+    <nav aria-label="Einstellungen" className="settings-sidebar" data-visual-region="settings-sidebar">
+      <div className="settings-sidebar-heading">
+        <strong>Einstellungen</strong>
+      </div>
+      <div className="settings-sidebar-list">
+        {SETTINGS_SECTIONS.map((section) => (
+          <button
+            aria-current={model.section === section.id ? "page" : undefined}
+            className={`settings-sidebar-item${model.section === section.id ? " is-active" : ""}`}
+            key={section.id}
+            onClick={() => actions.onSectionChange(section.id)}
+            type="button"
+          >{section.label}</button>
+        ))}
+      </div>
+    </nav>
+  );
+}
+
+export function SettingsContent({ model, actions }: SettingsViewProps): ReactElement {
+  const saveLabel = getSettingsSaveLabel(model.saveState);
+  const saveDisabled = model.saveState === "clean" || model.saveState === "saved" || model.saveState === "saving";
+  return (
+    <section aria-label="Einstellungsbereich" className="settings-content settings-static">
+      <header className="settings-content-header">
+        <div>
+          <h1>Einstellungen</h1>
+          <span aria-live="polite" className={`settings-save-state is-${model.saveState}`} role="status">{saveLabel}</span>
+        </div>
+        <button
+          className="settings-button settings-button-primary"
+          disabled={saveDisabled}
+          onClick={actions.onSave}
+          type="button"
+        >Einstellungen speichern</button>
+      </header>
+      <div className={`settings-content-body${model.section === "accounts" ? " is-accounts" : ""}`}>
+        {model.section === "accounts"
+          ? <AccountWorkspace actions={actions.accounts} model={model.accounts} />
+          : <SettingsForm actions={actions.form} model={model.form} />}
+      </div>
+    </section>
+  );
+}
+
+export function SettingsView({ model, actions, region = "all" }: SettingsViewProps): ReactElement {
+  if (region === "sidebar") {
+    return <SettingsSidebar actions={actions} model={model} />;
+  }
+  if (region === "content") {
+    return <SettingsContent actions={actions} model={model} />;
+  }
+  return (
+    <div className="settings-view">
+      <SettingsSidebar actions={actions} model={model} />
+      <SettingsContent actions={actions} model={model} />
+    </div>
+  );
+}

src/renderer/views/settings/settings-model.ts

@@ -0,0 +1,652 @@
+import type { AppSettings } from "../../../shared/types";
+import type { AccountService } from "../../account-edit";
+import { resolveAccountUsername } from "../../account-ui";
+import { ACCOUNT_SERVICE_ICONS } from "../../account-service-icons";
+
+export type SettingsSection = "allgemein" | "accounts" | "extract" | "speed" | "cleanup" | "updates";
+export type SettingsSaveState = "clean" | "dirty" | "saving" | "saved" | "error";
+
+export const SETTINGS_SECTIONS: readonly { id: SettingsSection; label: string }[] = [
+  { id: "allgemein", label: "Allgemein" },
+  { id: "accounts", label: "Accounts" },
+  { id: "extract", label: "Entpacken" },
+  { id: "speed", label: "Geschwindigkeit" },
+  { id: "cleanup", label: "Bereinigung" },
+  { id: "updates", label: "Updates" }
+];
+
+export const ACCOUNT_COLUMNS = [
+  "Hoster",
+  "Status",
+  "Download-Traffic übrig",
+  "Benutzername",
+  "Verfallsdatum",
+  "Passwort/Zugang"
+] as const;
+
+export function getSettingsSaveLabel(state: SettingsSaveState): string {
+  switch (state) {
+    case "dirty":
+      return "Ungespeicherte Änderungen";
+    case "saving":
+      return "Wird gespeichert…";
+    case "error":
+      return "Speichern fehlgeschlagen";
+    case "clean":
+    case "saved":
+      return "Gespeichert";
+  }
+}
+
+export type AccountStatusSourceState = "premium" | "free" | "invalid" | "checking" | "unchecked" | "disabled";
+export type AccountStatusTone = "ok" | "free" | "invalid" | "unknown" | "disabled";
+
+export interface AccountRowSource {
+  identityId: string;
+  service: AccountService;
+  hoster: string;
+  mode: string;
+  icon?: string;
+  enabled: boolean;
+  status: {
+    state: AccountStatusSourceState;
+    message: string;
+    premiumUntilMs: number | null;
+    email?: string;
+  };
+  dailyLimitBytes?: number;
+  dailyUsageBytes?: number;
+  username: string;
+  credentialKind: "password" | "api-key" | "protected";
+  canCheck: boolean;
+}
+
+export interface AccountRowViewModel {
+  id: string;
+  service: AccountService;
+  hoster: string;
+  mode: string;
+  icon: string;
+  enabled: boolean;
+  selected: boolean;
+  status: {
+    tone: AccountStatusTone;
+    text: string;
+  };
+  traffic: string;
+  username: string;
+  expires: string;
+  credential: string;
+  canCheck: boolean;
+  problem: boolean;
+  premiumUntilMs: number | null;
+}
+
+export type AccountAddFilter = "all" | "api" | "web";
+
+export interface AccountAddOption {
+  id: string;
+  service: AccountService;
+  title: string;
+  mode: string;
+  description: string;
+  functionLabel: string;
+  filter: Exclude<AccountAddFilter, "all">;
+  multi: boolean;
+  icon?: string;
+}
+
+export interface AccountAddDraft {
+  selectedId: string | null;
+  login: string;
+  password: string;
+  token: string;
+  dailyLimitGb: string;
+}
+
+export interface TargetedAccountCheck {
+  service: "megadebrid-api" | "debridlink";
+  expectedStatusId: string;
+}
+
+export interface SettingsFieldBase {
+  id: string;
+  label: string;
+  help?: string;
+  disabled?: boolean;
+}
+
+export interface SettingsTextFieldViewModel extends SettingsFieldBase {
+  kind: "text" | "path" | "number" | "textarea";
+  value: string;
+  placeholder?: string;
+  inputMode?: "decimal" | "numeric" | "text" | "url";
+  min?: number;
+  max?: number;
+  step?: number;
+  actionLabel?: string;
+  commitOnBlur?: boolean;
+}
+
+export interface SettingsSelectFieldViewModel extends SettingsFieldBase {
+  kind: "select";
+  value: string;
+  options: readonly { value: string; label: string }[];
+}
+
+export interface SettingsSwitchFieldViewModel extends SettingsFieldBase {
+  kind: "switch";
+  value: boolean;
+}
+
+export interface SettingsThemeFieldViewModel extends SettingsFieldBase {
+  kind: "theme";
+  value: string;
+  options: readonly { value: string; label: string }[];
+}
+
+export interface SettingsActionFieldViewModel extends SettingsFieldBase {
+  kind: "action";
+  actionLabel: string;
+}
+
+export type SettingsFieldViewModel =
+  | SettingsTextFieldViewModel
+  | SettingsSelectFieldViewModel
+  | SettingsSwitchFieldViewModel
+  | SettingsThemeFieldViewModel
+  | SettingsActionFieldViewModel;
+
+export interface SettingsFormGroupViewModel {
+  id: string;
+  title: string;
+  description?: string;
+  fields: readonly SettingsFieldViewModel[];
+}
+
+export interface SettingsFormViewModel {
+  title: string;
+  description: string;
+  groups: readonly SettingsFormGroupViewModel[];
+}
+
+export interface SettingsFormProjectionInput {
+  settings: AppSettings;
+  section: SettingsSection;
+  speedLimitInput: string;
+  scheduleSpeedInputs: Readonly<Record<string, string>>;
+  themeChoice?: "light" | "dark" | "system";
+}
+
+export function buildSettingsFormViewModel({
+  settings,
+  section,
+  speedLimitInput,
+  scheduleSpeedInputs,
+  themeChoice = settings.theme
+}: SettingsFormProjectionInput): SettingsFormViewModel {
+  if (section === "extract") {
+    return {
+      title: "Entpacken",
+      description: "Ablauf, Ziel, Tonspur, Ablageform und Leistung.",
+      groups: [
+        {
+          id: "extract-target",
+          title: "Ziel und Ablauf",
+          fields: [
+            { id: "extractDir", kind: "path", label: "Entpacken nach", value: settings.extractDir, actionLabel: "Wählen", help: "Zielordner für entpackte Dateien." },
+            { id: "autoExtract", kind: "switch", label: "Automatisch entpacken", value: settings.autoExtract },
+            { id: "autoSkipExtracted", kind: "switch", label: "Bereits Entpacktes überspringen", value: settings.autoSkipExtracted },
+            { id: "hideExtractedItems", kind: "switch", label: "Entpackte Einträge ausblenden", value: settings.hideExtractedItems },
+            { id: "autoExtractWhenStopped", kind: "switch", label: "Entpacken auch ohne laufende Sitzung", value: settings.autoExtractWhenStopped }
+          ]
+        },
+        {
+          id: "extract-audio",
+          title: "Deutsche Tonspur",
+          fields: [
+            { id: "keepGermanAudioOnly", kind: "switch", label: "Nur deutsche Tonspur behalten", value: settings.keepGermanAudioOnly, help: "Benötigt ffmpeg." },
+            {
+              id: "germanAudioMode",
+              kind: "select",
+              label: "Welche Tonspur behalten",
+              value: settings.germanAudioMode,
+              disabled: !settings.keepGermanAudioOnly,
+              options: [
+                { value: "tag", label: "Deutsche Spur per Sprach-Tag" },
+                { value: "first", label: "Immer erste Tonspur" }
+              ]
+            }
+          ]
+        },
+        {
+          id: "extract-layout",
+          title: "Ablageform",
+          fields: [
+            { id: "autoRename4sf4sj", kind: "switch", label: "Automatisch umbenennen", value: settings.autoRename4sf4sj },
+            { id: "createExtractSubfolder", kind: "switch", label: "In Paket-Unterordner ablegen", value: settings.createExtractSubfolder },
+            { id: "collectMkvToLibrary", kind: "switch", label: "Videos in Sammelordner verschieben", value: settings.collectMkvToLibrary },
+            { id: "mkvLibraryDir", kind: "path", label: "Video-Sammelordner", value: settings.mkvLibraryDir, disabled: !settings.collectMkvToLibrary, actionLabel: "Wählen" }
+          ]
+        },
+        {
+          id: "extract-performance",
+          title: "Leistung",
+          fields: [
+            { id: "hybridExtract", kind: "switch", label: "Hybrid-Entpacken", value: settings.hybridExtract },
+            { id: "maxParallelExtract", kind: "number", label: "Gleichzeitige Entpackungen", value: String(settings.maxParallelExtract), min: 1, max: 8 },
+            {
+              id: "extractCpuPriority",
+              kind: "select",
+              label: "CPU-Priorität beim Entpacken",
+              value: settings.extractCpuPriority,
+              options: [
+                { value: "high", label: "Hoch (80% CPU)" },
+                { value: "middle", label: "Mittel (50% CPU)" },
+                { value: "low", label: "Niedrig (25% CPU)" }
+              ]
+            }
+          ]
+        },
+        {
+          id: "extract-passwords",
+          title: "Passwörter",
+          fields: [
+            { id: "archivePasswordList", kind: "textarea", label: "Passwortliste für Archive", value: settings.archivePasswordList, placeholder: "Ein Passwort pro Zeile" }
+          ]
+        }
+      ]
+    };
+  }
+  if (section === "speed") {
+    const scheduleGroups: SettingsFormGroupViewModel[] = (settings.bandwidthSchedules || []).map((schedule, index) => {
+      const scheduleKey = schedule.id || `schedule-${index}`;
+      return {
+        id: `schedule:${index}`,
+        title: `Zeitregel ${index + 1}`,
+        fields: [
+          { id: `schedule:${index}:startHour`, kind: "number", label: "Von (Stunde)", value: String(schedule.startHour), min: 0, max: 23 },
+          { id: `schedule:${index}:endHour`, kind: "number", label: "Bis (Stunde)", value: String(schedule.endHour), min: 0, max: 23 },
+          {
+            id: `schedule:${index}:speedLimitMbps`,
+            kind: "number",
+            label: "Limit (MB/s)",
+            value: scheduleSpeedInputs[scheduleKey] ?? String(schedule.speedLimitKbps / 1024),
+            min: 0,
+            step: 0.1,
+            commitOnBlur: true
+          },
+          { id: `schedule:${index}:enabled`, kind: "switch", label: "Zeitregel aktiviert", value: schedule.enabled },
+          { id: `schedule:${index}:remove`, kind: "action", label: "Zeitregel entfernen", actionLabel: "Entfernen" }
+        ]
+      };
+    });
+    return {
+      title: "Geschwindigkeit",
+      description: "Tempo, Wiederverbindung und zeitgesteuerte Bandbreitenregeln.",
+      groups: [
+        {
+          id: "speed-limit",
+          title: "Tempo-Begrenzung",
+          fields: [
+            { id: "speedLimitEnabled", kind: "switch", label: "Geschwindigkeit begrenzen", value: settings.speedLimitEnabled },
+            { id: "speedLimitInput", kind: "number", label: "Höchstgeschwindigkeit (MB/s)", value: speedLimitInput, min: 0, step: 0.1, disabled: !settings.speedLimitEnabled, commitOnBlur: true },
+            {
+              id: "speedLimitMode",
+              kind: "select",
+              label: "Limit gilt für",
+              value: settings.speedLimitMode,
+              disabled: !settings.speedLimitEnabled,
+              options: [
+                { value: "global", label: "Global" },
+                { value: "per_download", label: "Pro Download" }
+              ]
+            }
+          ]
+        },
+        {
+          id: "speed-connection",
+          title: "Verbindung",
+          fields: [
+            { id: "autoReconnect", kind: "switch", label: "Automatisch neu verbinden", value: settings.autoReconnect },
+            { id: "reconnectWaitSeconds", kind: "number", label: "Wartezeit vor neuem Versuch (Sek.)", value: String(settings.reconnectWaitSeconds), min: 10, max: 600 }
+          ]
+        },
+        ...scheduleGroups,
+        {
+          id: "speed-schedule-add",
+          title: "Bandbreitenplanung",
+          description: "Jede Regel legt für ein Zeitfenster ein eigenes Limit fest.",
+          fields: [{ id: "schedule:add", kind: "action", label: "Weitere Zeitregel", actionLabel: "Zeitregel hinzufügen" }]
+        }
+      ]
+    };
+  }
+  if (section === "cleanup") {
+    return {
+      title: "Bereinigung",
+      description: "Integritätsprüfung und Aufräumen nach Downloads und Entpacken.",
+      groups: [
+        {
+          id: "cleanup-check",
+          title: "Prüfung",
+          fields: [{ id: "enableIntegrityCheck", kind: "switch", label: "Dateien auf Fehler prüfen", value: settings.enableIntegrityCheck }]
+        },
+        {
+          id: "cleanup-extract",
+          title: "Nach dem Entpacken",
+          fields: [
+            { id: "removeLinkFilesAfterExtract", kind: "switch", label: "Link-Dateien danach entfernen", value: settings.removeLinkFilesAfterExtract },
+            { id: "removeSamplesAfterExtract", kind: "switch", label: "Vorschau-Dateien danach entfernen", value: settings.removeSamplesAfterExtract },
+            {
+              id: "cleanupMode",
+              kind: "select",
+              label: "Archive nach dem Entpacken",
+              value: settings.cleanupMode,
+              options: [
+                { value: "none", label: "Keine Archive löschen" },
+                { value: "trash", label: "Archive in Papierkorb" },
+                { value: "delete", label: "Archive löschen" }
+              ]
+            }
+          ]
+        },
+        {
+          id: "cleanup-finished",
+          title: "Fertige Downloads und Konflikte",
+          fields: [
+            {
+              id: "completedCleanupPolicy",
+              kind: "select",
+              label: "Fertige Downloads aus der Liste",
+              value: settings.completedCleanupPolicy,
+              options: [
+                { value: "never", label: "Nie" },
+                { value: "immediate", label: "Sofort" },
+                { value: "on_start", label: "Beim App-Start" },
+                { value: "package_done", label: "Sobald Paket fertig ist" }
+              ]
+            },
+            {
+              id: "extractConflictMode",
+              kind: "select",
+              label: "Bei gleichnamigen Dateien",
+              value: settings.extractConflictMode,
+              options: [
+                { value: "overwrite", label: "Überschreiben" },
+                { value: "skip", label: "Überspringen" },
+                { value: "rename", label: "Umbenennen" },
+                { value: "ask", label: "Nachfragen" }
+              ]
+            }
+          ]
+        }
+      ]
+    };
+  }
+  if (section === "updates") {
+    return {
+      title: "Updates",
+      description: "Quelle und Zeitpunkt der Update-Prüfung.",
+      groups: [
+        {
+          id: "updates-main",
+          title: "Aktualisierung",
+          fields: [
+            { id: "autoUpdateCheck", kind: "switch", label: "Beim Start nach Updates suchen", value: settings.autoUpdateCheck },
+            { id: "updateRepo", kind: "text", label: "Update-Quelle", value: settings.updateRepo, help: "Quelle im Format Benutzer/Repository." },
+            { id: "update:check", kind: "action", label: "Jetzt nach einer neuen Version suchen", actionLabel: "Nach Updates suchen" }
+          ]
+        }
+      ]
+    };
+  }
+  if (section === "accounts") {
+    return { title: "Accounts", description: "Accounts und Verwendungsregeln.", groups: [] };
+  }
+  return {
+    title: "Allgemein",
+    description: "Speicherort, Download-Verhalten, Verlauf, Oberfläche und Benachrichtigungen.",
+    groups: [
+      {
+        id: "general-storage",
+        title: "Speicherort",
+        fields: [
+          { id: "outputDir", kind: "path", label: "Download-Ordner", value: settings.outputDir, actionLabel: "Wählen", help: "Zielordner für heruntergeladene Dateien." },
+          { id: "packageName", kind: "text", label: "Paketname (optional)", value: settings.packageName }
+        ]
+      },
+      {
+        id: "general-downloads",
+        title: "Download-Verhalten",
+        fields: [
+          { id: "maxParallel", kind: "number", label: "Max. gleichzeitige Downloads", value: String(settings.maxParallel), min: 1, max: 50 },
+          { id: "retryLimit", kind: "number", label: "Automatische Wiederholungen", value: String(settings.retryLimit), min: 0, max: 99 },
+          { id: "autoResumeOnStart", kind: "switch", label: "Beim Start automatisch fortsetzen", value: settings.autoResumeOnStart },
+          { id: "clipboardWatch", kind: "switch", label: "Zwischenablage überwachen", value: settings.clipboardWatch }
+        ]
+      },
+      {
+        id: "general-history",
+        title: "Verlauf",
+        fields: [
+          {
+            id: "historyRetentionMode",
+            kind: "select",
+            label: "Verlauf speichern",
+            value: settings.historyRetentionMode,
+            options: [
+              { value: "never", label: "Nie" },
+              { value: "session", label: "Nur aktuelle Session" },
+              { value: "permanent", label: "Dauerhaft" }
+            ]
+          },
+          { id: "historyMaxEntries", kind: "number", label: "Maximale Verlauf-Einträge", value: String(settings.historyMaxEntries), min: 50, max: 100000, disabled: settings.historyRetentionMode !== "permanent" },
+          { id: "historyMaxAgeDays", kind: "number", label: "Einträge löschen älter als (Tage)", value: String(settings.historyMaxAgeDays), min: 0, max: 3650, disabled: settings.historyRetentionMode !== "permanent" }
+        ]
+      },
+      {
+        id: "general-interface",
+        title: "Oberfläche und Bedienung",
+        fields: [
+          { id: "collapseNewPackages", kind: "switch", label: "Neue Pakete eingeklappt zeigen", value: settings.collapseNewPackages },
+          { id: "autoSortPackagesByProgress", kind: "switch", label: "Nach Fortschritt sortieren", value: settings.autoSortPackagesByProgress },
+          { id: "minimizeToTray", kind: "switch", label: "In den Infobereich minimieren", value: settings.minimizeToTray },
+          { id: "confirmDeleteSelection", kind: "switch", label: "Vor dem Löschen nachfragen", value: settings.confirmDeleteSelection },
+          { id: "backupIncludeDownloads", kind: "switch", label: "Download-Liste mitsichern", value: settings.backupIncludeDownloads },
+          { id: "backupIncludeRemoteDiagnostics", kind: "switch", label: "Ferndiagnose-Einstellungen mitsichern", value: settings.backupIncludeRemoteDiagnostics },
+          {
+            id: "theme",
+            kind: "theme",
+            label: "Theme",
+            value: themeChoice,
+            options: [
+              { value: "light", label: "Light" },
+              { value: "dark", label: "Dark" },
+              { value: "system", label: "System" }
+            ]
+          }
+        ]
+      },
+      {
+        id: "general-notifications",
+        title: "Discord-Benachrichtigungen",
+        fields: [
+          { id: "notifyUrl", kind: "text", label: "Webhook-Adresse", value: settings.notifyUrl, placeholder: "https://discord.com/api/webhooks/…", actionLabel: "Testen" },
+          { id: "notifyMention", kind: "text", label: "Discord-Erwähnung (optional)", value: settings.notifyMention },
+          { id: "notifyOnPackageCompleted", kind: "switch", label: "Melden, wenn ein Paket fertig ist", value: settings.notifyOnPackageCompleted },
+          { id: "notifyOnPackageFailed", kind: "switch", label: "Melden, wenn ein Paket fehlschlägt", value: settings.notifyOnPackageFailed },
+          { id: "notifyOnRunFinished", kind: "switch", label: "Melden, wenn alles fertig ist", value: settings.notifyOnRunFinished }
+        ]
+      }
+    ]
+  };
+}
+
+export function buildAccountRowId(service: AccountService, mode: string, identityId: string): string {
+  return [service, mode, identityId].map((part) => encodeURIComponent(part)).join("::");
+}
+
+function formatBytes(bytes: number): string {
+  if (!Number.isFinite(bytes) || bytes <= 0) {
+    return "0 B";
+  }
+  const units = ["B", "KiB", "MiB", "GiB", "TiB"];
+  const unitIndex = Math.min(Math.floor(Math.log(bytes) / Math.log(1024)), units.length - 1);
+  const value = bytes / (1024 ** unitIndex);
+  return `${new Intl.NumberFormat("de-DE", { maximumFractionDigits: value >= 100 ? 0 : value >= 10 ? 1 : 2 }).format(value)} ${units[unitIndex]}`;
+}
+
+function formatTraffic(limitBytes?: number, usageBytes?: number): string {
+  if (!Number.isFinite(limitBytes) || !limitBytes || limitBytes <= 0) {
+    return "Unbeschränkt";
+  }
+  const safeUsage = Number.isFinite(usageBytes) && usageBytes && usageBytes > 0 ? usageBytes : 0;
+  return `${formatBytes(Math.max(0, limitBytes - safeUsage))} von ${formatBytes(limitBytes)} übrig`;
+}
+
+function formatExpiry(premiumUntilMs: number | null): string {
+  if (!premiumUntilMs || !Number.isFinite(premiumUntilMs) || premiumUntilMs <= 0) {
+    return "—";
+  }
+  return new Intl.DateTimeFormat("de-DE").format(new Date(premiumUntilMs));
+}
+
+function projectStatus(source: AccountRowSource): { tone: AccountStatusTone; text: string } {
+  if (!source.enabled || source.status.state === "disabled") {
+    return { tone: "disabled", text: "Deaktiviert" };
+  }
+  switch (source.status.state) {
+    case "premium":
+      return { tone: "ok", text: source.status.message.trim() || "Premium Account" };
+    case "free":
+      return { tone: "free", text: "Free Account" };
+    case "invalid":
+      return { tone: "invalid", text: source.status.message.trim() || "Zugang ungültig" };
+    case "checking":
+      return { tone: "unknown", text: "Prüft…" };
+    case "unchecked":
+      return { tone: "unknown", text: "Noch nicht geprüft" };
+  }
+}
+
+function projectCredential(kind: AccountRowSource["credentialKind"]): string {
+  if (kind === "api-key") {
+    return "API-Key";
+  }
+  return kind === "password" ? "••••••" : "Geschützter Zugang";
+}
+
+export function projectAccountRows(
+  sources: readonly AccountRowSource[],
+  selectedIds: readonly string[],
+  nowMs: number = Date.now()
+): AccountRowViewModel[] {
+  const selected = new Set(selectedIds);
+  return sources.map((source) => {
+    const id = buildAccountRowId(source.service, source.mode, source.identityId);
+    const status = projectStatus(source);
+    const premiumUntilMs = source.status.premiumUntilMs && source.status.premiumUntilMs > nowMs
+      ? source.status.premiumUntilMs
+      : null;
+    return {
+      id,
+      service: source.service,
+      hoster: source.hoster,
+      mode: source.mode,
+      icon: ACCOUNT_SERVICE_ICONS[source.service],
+      enabled: source.enabled,
+      selected: selected.has(id),
+      status,
+      traffic: formatTraffic(source.dailyLimitBytes, source.dailyUsageBytes),
+      username: resolveAccountUsername(source.username, source.status.email),
+      expires: formatExpiry(source.status.premiumUntilMs),
+      credential: projectCredential(source.credentialKind),
+      canCheck: source.canCheck,
+      problem: status.tone === "invalid",
+      premiumUntilMs
+    };
+  });
+}
+
+export function sortAccountRows(
+  rows: readonly AccountRowViewModel[],
+  direction: "desc" | "asc" = "desc"
+): AccountRowViewModel[] {
+  return rows
+    .map((row, index) => ({ row, index }))
+    .sort((left, right) => {
+      const leftUntil = left.row.premiumUntilMs ?? -1;
+      const rightUntil = right.row.premiumUntilMs ?? -1;
+      if (leftUntil > 0 && rightUntil > 0) {
+        return (direction === "desc" ? rightUntil - leftUntil : leftUntil - rightUntil) || left.index - right.index;
+      }
+      if (leftUntil > 0) {
+        return -1;
+      }
+      if (rightUntil > 0) {
+        return 1;
+      }
+      return left.index - right.index;
+    })
+    .map(({ row }) => row);
+}
+
+export function pruneAccountSelection(
+  selectedIds: readonly string[],
+  rows: readonly Pick<AccountRowViewModel, "id">[]
+): string[] {
+  const existing = new Set(rows.map((row) => row.id));
+  return [...new Set(selectedIds)].filter((id) => existing.has(id));
+}
+
+export function filterAccountAddOptions(
+  options: readonly AccountAddOption[],
+  query: string,
+  filter: AccountAddFilter,
+  configuredServices: readonly string[]
+): AccountAddOption[] {
+  const normalizedQuery = query.trim().toLocaleLowerCase("de-DE");
+  const configured = new Set(configuredServices);
+  return options.filter((option) => {
+    if (!option.multi && configured.has(option.service)) {
+      return false;
+    }
+    if (filter !== "all" && option.filter !== filter) {
+      return false;
+    }
+    if (!normalizedQuery) {
+      return true;
+    }
+    return [option.title, option.service, option.mode, option.description, option.functionLabel]
+      .join(" ")
+      .toLocaleLowerCase("de-DE")
+      .includes(normalizedQuery);
+  });
+}
+
+export function reconcileAccountAddDraft(
+  draft: AccountAddDraft,
+  visibleOptions: readonly Pick<AccountAddOption, "id">[]
+): AccountAddDraft {
+  if (draft.selectedId && visibleOptions.some((option) => option.id === draft.selectedId)) {
+    return draft;
+  }
+  return {
+    selectedId: null,
+    login: "",
+    password: "",
+    token: "",
+    dailyLimitGb: ""
+  };
+}
+
+export function buildTargetedAccountCheck(
+  option: Pick<AccountAddOption, "service">,
+  identityId: string
+): TargetedAccountCheck | null {
+  if (option.service !== "megadebrid-api" && option.service !== "debridlink") {
+    return null;
+  }
+  return { service: option.service, expectedStatusId: identityId };
+}

src/renderer/views/settings/settings.css

@@ -0,0 +1,876 @@
+.settings-view {
+  display: grid;
+  grid-template-columns: 270px minmax(0, 1fr);
+  min-width: 0;
+  min-height: 0;
+  height: 100%;
+  overflow: hidden;
+}
+
+.settings-sidebar {
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  flex-direction: column;
+  gap: 8px;
+  padding: 12px;
+  border-right: 1px solid var(--ui-border);
+  background: var(--ui-surface);
+}
+
+.settings-sidebar-heading {
+  display: flex;
+  min-height: 32px;
+  align-items: center;
+  padding: 0 8px;
+  color: var(--ui-text-secondary);
+  font-size: 13px;
+}
+
+.settings-sidebar-list {
+  display: flex;
+  min-height: 0;
+  flex: 1 1 auto;
+  flex-direction: column;
+  gap: 4px;
+  overflow-y: auto;
+}
+
+.settings-sidebar-item {
+  min-height: 36px;
+  padding: 0 10px;
+  border: 1px solid transparent;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--ui-text-secondary);
+  font: inherit;
+  text-align: left;
+}
+
+.settings-sidebar-item:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.settings-sidebar-item.is-active {
+  border-color: var(--ui-border);
+  background: var(--ui-active);
+  color: var(--ui-text);
+}
+
+.settings-content {
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  flex-direction: column;
+  gap: 20px;
+  padding: 24px;
+  overflow-y: auto;
+  background: var(--ui-canvas);
+}
+
+.md-runtime-view-content > .settings-content {
+  height: 100%;
+  padding: 24px;
+}
+
+.settings-static {
+  user-select: none;
+}
+
+.settings-content :where(input, textarea, [contenteditable="true"], .settings-copyable) {
+  user-select: text;
+}
+
+.settings-content-header {
+  display: flex;
+  min-width: 0;
+  flex: 0 0 auto;
+  align-items: center;
+  justify-content: space-between;
+  gap: 20px;
+}
+
+.settings-content-header > div {
+  display: flex;
+  min-width: 0;
+  align-items: baseline;
+  gap: 12px;
+}
+
+.settings-content-header h1,
+.settings-form-heading h2,
+.settings-account-heading h2,
+.settings-form-group h3,
+.settings-rule-section h3 {
+  margin: 0;
+  color: var(--ui-text);
+}
+
+.settings-content-header h1 {
+  font-size: 22px;
+  line-height: 30px;
+}
+
+.settings-save-state {
+  color: var(--ui-text-muted);
+  font-size: 12px;
+}
+
+.settings-save-state.is-dirty,
+.settings-save-state.is-saving {
+  color: var(--ui-warning);
+}
+
+.settings-save-state.is-error {
+  color: var(--ui-danger);
+}
+
+.settings-content-body {
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  flex: 1 1 auto;
+  align-items: flex-start;
+}
+
+.settings-content-body.is-accounts {
+  align-items: stretch;
+}
+
+.settings-form-column {
+  width: 500px;
+  max-width: 100%;
+}
+
+.settings-form-heading {
+  margin-bottom: 24px;
+}
+
+.settings-form-heading h2,
+.settings-account-heading h2 {
+  font-size: 20px;
+  line-height: 28px;
+}
+
+.settings-form-heading p,
+.settings-account-heading p,
+.settings-form-group > header p,
+.settings-rule-section > p {
+  margin: 4px 0 0;
+  color: var(--ui-text-muted);
+  font-size: 13px;
+  line-height: 20px;
+}
+
+.settings-form-group {
+  padding: 22px 0;
+  border-top: 1px solid var(--ui-border);
+}
+
+.settings-form-group:first-of-type {
+  border-top: 0;
+  padding-top: 0;
+}
+
+.settings-form-group h3,
+.settings-rule-section h3 {
+  font-size: 15px;
+  line-height: 22px;
+}
+
+.settings-form-fields {
+  display: grid;
+  gap: 18px;
+  margin-top: 16px;
+}
+
+.settings-field {
+  display: grid;
+  gap: 7px;
+  min-width: 0;
+  margin: 0;
+  padding: 0;
+  border: 0;
+}
+
+.settings-field > label,
+.settings-field > legend,
+.settings-account-dialog-field > span,
+.settings-switch-label {
+  color: var(--ui-text-secondary);
+  font-size: 13px;
+  font-weight: 600;
+  line-height: 18px;
+}
+
+.settings-control {
+  width: 100%;
+  height: 44px;
+  min-width: 0;
+  padding: 0 12px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  outline: 0;
+  background: var(--ui-input);
+  color: var(--ui-text);
+  color-scheme: inherit;
+  font: inherit;
+}
+
+.settings-control:focus-visible,
+.settings-button:focus-visible,
+.settings-switch:focus-visible,
+.settings-theme-option:focus-visible,
+.settings-sidebar-item:focus-visible,
+.settings-account-tabs button:focus-visible,
+.settings-account-row:focus-visible,
+.settings-account-action-button:focus-visible,
+.settings-account-picker-row:focus-visible {
+  outline: 2px solid var(--ui-accent);
+  outline-offset: 2px;
+}
+
+.settings-control:disabled,
+.settings-button:disabled,
+.settings-switch:disabled {
+  cursor: default;
+  opacity: 0.5;
+}
+
+.settings-textarea {
+  height: auto;
+  min-height: 108px;
+  padding: 10px 12px;
+  line-height: 1.45;
+  resize: vertical;
+}
+
+.settings-control-row {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 8px;
+}
+
+.settings-field-help {
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  line-height: 18px;
+}
+
+.settings-switch-field,
+.settings-action-field {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+}
+
+.settings-switch-field > div,
+.settings-action-field > div {
+  display: grid;
+  min-width: 0;
+  gap: 3px;
+}
+
+.settings-switch {
+  position: relative;
+  width: 40px;
+  height: 20px;
+  flex: 0 0 40px;
+  padding: 0;
+  border: 1px solid var(--ui-border);
+  border-radius: 10px;
+  background: var(--ui-input);
+}
+
+.settings-switch > span {
+  position: absolute;
+  top: 2px;
+  left: 2px;
+  width: 14px;
+  height: 14px;
+  border-radius: 50%;
+  background: var(--ui-text-muted);
+  transition: transform 120ms ease, background 120ms ease;
+}
+
+.settings-switch.is-on {
+  border-color: var(--ui-accent);
+  background: var(--ui-accent);
+}
+
+.settings-switch.is-on > span {
+  background: #FFFFFF;
+  transform: translateX(20px);
+}
+
+.settings-theme-options {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 8px;
+}
+
+.settings-theme-option {
+  display: grid;
+  gap: 7px;
+  padding: 8px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  background: var(--ui-input);
+  color: var(--ui-text-secondary);
+  font: inherit;
+  text-align: left;
+}
+
+.settings-theme-option.is-active {
+  border-color: var(--ui-accent);
+  color: var(--ui-text);
+}
+
+.settings-theme-preview {
+  position: relative;
+  display: block;
+  height: 42px;
+  overflow: hidden;
+  border: 1px solid var(--ui-border);
+  border-radius: 4px;
+}
+
+.settings-theme-preview::after {
+  position: absolute;
+  top: 7px;
+  left: 8px;
+  width: 58%;
+  height: 4px;
+  border-radius: 2px;
+  background: #9AA1AD;
+  box-shadow: 0 9px 0 #737B88, 0 18px 0 #737B88;
+  content: "";
+}
+
+.settings-theme-preview.is-light {
+  background: #F3F4F6;
+}
+
+.settings-theme-preview.is-dark {
+  background: #1C1D20;
+}
+
+.settings-theme-preview.is-system {
+  background: #F3F4F6;
+}
+
+.settings-theme-preview.is-system::before {
+  position: absolute;
+  inset: 0 0 0 50%;
+  background: #1C1D20;
+  content: "";
+}
+
+.settings-button {
+  height: 36px;
+  padding: 0 13px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  color: var(--ui-text-secondary);
+  font: inherit;
+  white-space: nowrap;
+}
+
+.settings-button-secondary {
+  background: var(--ui-modal-secondary);
+}
+
+.settings-button-primary {
+  border-color: var(--ui-primary);
+  background: var(--ui-primary);
+  color: #181A1F;
+}
+
+.settings-button-danger {
+  border-color: color-mix(in srgb, var(--ui-danger) 70%, var(--ui-border));
+  background: transparent;
+  color: var(--ui-danger);
+}
+
+.settings-button:hover:not(:disabled),
+.settings-account-tabs button:hover,
+.settings-account-action-button:hover:not(:disabled) {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.settings-button-primary:hover:not(:disabled) {
+  background: var(--ui-primary-hover);
+  color: #181A1F;
+}
+
+.settings-account-workspace {
+  display: grid;
+  grid-template-rows: auto auto minmax(0, 1fr);
+  width: 100%;
+  min-width: 0;
+  min-height: 0;
+  gap: 14px;
+}
+
+.settings-account-heading {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 20px;
+}
+
+.settings-account-tabs {
+  display: flex;
+  gap: 4px;
+  border-bottom: 1px solid var(--ui-border);
+}
+
+.settings-account-tabs button {
+  min-height: 36px;
+  padding: 0 12px;
+  border: 0;
+  border-bottom: 2px solid transparent;
+  background: transparent;
+  color: var(--ui-text-muted);
+  font: inherit;
+}
+
+.settings-account-tabs button[aria-selected="true"] {
+  border-bottom-color: var(--ui-accent);
+  color: var(--ui-text);
+}
+
+.settings-account-panel {
+  display: flex;
+  width: 100%;
+  min-width: 0;
+  min-height: 0;
+  flex-direction: column;
+}
+
+.settings-account-panel[hidden] {
+  display: none;
+}
+
+.settings-account-table {
+  min-height: 280px;
+}
+
+.settings-account-table-header {
+  height: 41px;
+  overflow: hidden;
+}
+
+.settings-account-table-grid,
+.settings-account-row {
+  display: grid;
+  grid-template-columns: 42px minmax(170px, 1.1fr) minmax(150px, 0.9fr) minmax(190px, 1.2fr) minmax(190px, 1.15fr) minmax(130px, 0.8fr) minmax(145px, 0.85fr) 44px;
+  min-width: 1110px;
+  align-items: center;
+}
+
+.settings-account-table-grid {
+  height: 41px;
+  color: var(--ui-text-muted);
+  font-size: 11px;
+  font-weight: 700;
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+}
+
+.settings-account-table-grid > span,
+.settings-account-row > span {
+  min-width: 0;
+  padding: 0 11px;
+}
+
+.settings-account-table-body {
+  overflow: auto;
+}
+
+.settings-account-row {
+  position: relative;
+  height: 48px;
+  border-bottom: 1px solid var(--ui-border);
+  color: var(--ui-text-secondary);
+  font-size: 14px;
+}
+
+.settings-account-row::before {
+  position: absolute;
+  top: 5px;
+  bottom: 5px;
+  left: 0;
+  width: 3px;
+  border-radius: 0 2px 2px 0;
+  background: var(--ui-accent);
+  content: "";
+  opacity: 0;
+}
+
+.settings-account-row:hover {
+  background: var(--ui-hover);
+}
+
+.settings-account-row.is-selected {
+  background: var(--ui-active);
+}
+
+.settings-account-row.is-selected::before {
+  opacity: 1;
+}
+
+.settings-account-row.is-disabled {
+  color: var(--ui-text-muted);
+  opacity: 0.72;
+}
+
+.settings-account-column-enable,
+.settings-account-column-actions {
+  display: grid;
+  place-items: center;
+}
+
+.settings-account-hoster {
+  display: flex;
+  align-items: center;
+  gap: 9px;
+}
+
+.settings-account-hoster img {
+  flex: 0 0 20px;
+  object-fit: contain;
+}
+
+.settings-account-hoster > span {
+  display: grid;
+  min-width: 0;
+}
+
+.settings-account-hoster strong,
+.settings-account-hoster small {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.settings-account-hoster small {
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  font-weight: 400;
+}
+
+.settings-account-status-badge {
+  display: inline-flex;
+  max-width: 100%;
+  align-items: center;
+  gap: 6px;
+  overflow: hidden;
+  color: var(--ui-text-secondary);
+  font-size: 12px;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.settings-account-status-badge::before {
+  width: 7px;
+  height: 7px;
+  flex: 0 0 7px;
+  border-radius: 50%;
+  background: var(--ui-text-muted);
+  content: "";
+}
+
+.settings-account-status-badge.is-ok::before {
+  background: var(--ui-primary);
+}
+
+.settings-account-status-badge.is-free::before,
+.settings-account-status-badge.is-unknown::before {
+  background: var(--ui-warning);
+}
+
+.settings-account-status-badge.is-invalid::before {
+  background: var(--ui-danger);
+}
+
+.settings-account-status-badge.is-disabled::before {
+  background: var(--ui-text-muted);
+}
+
+.settings-account-traffic,
+.settings-account-expires,
+.settings-account-credential {
+  color: var(--ui-text-muted);
+  font-variant-numeric: tabular-nums;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.settings-account-username {
+  overflow: hidden;
+  color: var(--ui-text);
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.settings-account-action-button {
+  display: grid;
+  width: 30px;
+  height: 30px;
+  padding: 0;
+  place-items: center;
+  border: 1px solid transparent;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--ui-text-secondary);
+  font-size: 20px;
+}
+
+.settings-account-local-actions {
+  display: flex;
+  min-height: 52px;
+  flex: 0 0 auto;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  border-top: 1px solid var(--ui-border);
+  color: var(--ui-text-muted);
+  font-size: 12px;
+}
+
+.settings-account-local-actions > div {
+  display: flex;
+  gap: 8px;
+}
+
+.settings-account-table-error .ui-data-table-empty-title,
+.settings-account-dialog-error {
+  color: var(--ui-danger);
+}
+
+.settings-account-rules {
+  display: grid;
+  width: 100%;
+  min-width: 0;
+  gap: 22px;
+  overflow-y: auto;
+}
+
+.settings-rule-section {
+  display: grid;
+  gap: 12px;
+  padding-bottom: 22px;
+  border-bottom: 1px solid var(--ui-border);
+}
+
+.settings-provider-order,
+.settings-routing-list {
+  display: grid;
+  gap: 6px;
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+
+.settings-provider-order li,
+.settings-routing-list li,
+.settings-rotation-event {
+  display: flex;
+  min-height: 40px;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 7px 10px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  background: var(--ui-input);
+  color: var(--ui-text-secondary);
+}
+
+.settings-provider-order-actions {
+  display: flex;
+  gap: 4px;
+}
+
+.settings-provider-order-actions button {
+  width: 30px;
+  height: 28px;
+  border: 1px solid var(--ui-border);
+  border-radius: 5px;
+  background: var(--ui-modal-secondary);
+  color: var(--ui-text-secondary);
+}
+
+.settings-rule-toggle {
+  display: flex;
+  align-items: center;
+  gap: 9px;
+  color: var(--ui-text-secondary);
+  font-size: 13px;
+}
+
+.settings-rule-empty {
+  color: var(--ui-text-muted);
+  font-size: 13px;
+}
+
+.settings-rotation-event {
+  align-items: flex-start;
+  flex-direction: column;
+}
+
+.settings-rotation-event span {
+  color: var(--ui-text-muted);
+  font-size: 12px;
+}
+
+.settings-account-dialog-body {
+  display: grid;
+  gap: 16px;
+  min-height: 0;
+}
+
+.settings-account-picker-controls {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 128px;
+  gap: 8px;
+}
+
+.settings-account-picker {
+  display: grid;
+  max-height: 430px;
+  min-height: 0;
+  gap: 6px;
+  overflow-y: auto;
+}
+
+.settings-account-picker-entry {
+  display: grid;
+  gap: 10px;
+}
+
+.settings-account-picker-row {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 150px;
+  gap: 12px;
+  width: 100%;
+  min-height: 52px;
+  padding: 8px 10px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  background: var(--ui-input);
+  color: var(--ui-text-secondary);
+  font: inherit;
+  text-align: left;
+}
+
+.settings-account-picker-row.is-selected {
+  border-color: var(--ui-accent);
+  background: var(--ui-active);
+}
+
+.settings-account-picker-row > span {
+  display: grid;
+  min-width: 0;
+  gap: 2px;
+}
+
+.settings-account-picker-row small {
+  overflow: hidden;
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.settings-account-picker-empty {
+  padding: 24px;
+  color: var(--ui-text-muted);
+  text-align: center;
+}
+
+.settings-account-dialog-fields {
+  display: grid;
+  gap: 14px;
+  padding: 2px 10px 14px;
+}
+
+.settings-account-dialog-field {
+  display: grid;
+  gap: 7px;
+}
+
+.settings-account-dialog-textarea {
+  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
+}
+
+.settings-account-dialog-error {
+  margin: 0;
+  font-size: 13px;
+}
+
+.settings-account-dialog-actions {
+  justify-content: flex-start;
+}
+
+.settings-account-dialog-action-spacer {
+  flex: 1 1 auto;
+}
+
+.settings-account-edit-identity {
+  display: grid;
+  gap: 4px;
+  padding-bottom: 14px;
+  border-bottom: 1px solid var(--ui-border);
+}
+
+.settings-account-edit-identity span {
+  color: var(--ui-text-muted);
+  font-size: 12px;
+}
+
+.settings-account-edit-identity strong {
+  color: var(--ui-text);
+  overflow-wrap: anywhere;
+}
+
+.settings-account-edit-enabled {
+  min-height: 30px;
+}
+
+@media (max-width: 1366px) {
+  .settings-view {
+    grid-template-columns: 56px minmax(0, 1fr);
+  }
+
+  .settings-sidebar {
+    overflow: hidden;
+  }
+
+  .settings-content {
+    padding: 20px;
+  }
+
+  .settings-account-table-grid,
+  .settings-account-row {
+    grid-template-columns: 40px 160px 140px 180px 180px 120px 140px 42px;
+    min-width: 1002px;
+  }
+}
+
+@media (max-width: 1120px) {
+  .settings-content {
+    padding: 16px;
+  }
+
+  .settings-theme-options,
+  .settings-account-picker-controls,
+  .settings-account-picker-row {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}

src/renderer/views/statistics/StatisticsView.tsx

@@ -0,0 +1,226 @@
+import type { ReactElement, ReactNode } from "react";
+import type {
+  StatisticsMetric,
+  StatisticsProviderScope,
+  StatisticsRange,
+  StatisticsViewModel
+} from "./statistics-model";
+import "./statistics.css";
+
+export interface StatisticsViewActions {
+  onRangeChange: (range: StatisticsRange) => void;
+  onResetSession: () => void;
+  onResetAll: () => void;
+  onResetErrors: () => void;
+}
+
+export interface StatisticsViewProps {
+  model: StatisticsViewModel;
+  actions: StatisticsViewActions;
+  chart: ReactNode;
+}
+
+const rangeItems: Array<{ id: StatisticsRange; label: string }> = [
+  { id: "session", label: "Sitzung" },
+  { id: "today", label: "Heute" },
+  { id: "week", label: "Sieben Tage" },
+  { id: "month", label: "30 Tage" },
+  { id: "all", label: "Gesamt" }
+];
+
+const numberFormatter = new Intl.NumberFormat("de-DE", { maximumFractionDigits: 1 });
+
+function formatBytes(bytes: number): string {
+  const safe = Math.max(0, Number.isFinite(bytes) ? bytes : 0);
+  if (safe < 1024) {
+    return `${Math.round(safe)} B`;
+  }
+  const units = ["KB", "MB", "GB", "TB", "PB"];
+  let value = safe / 1024;
+  let unitIndex = 0;
+  while (value >= 1024 && unitIndex < units.length - 1) {
+    value /= 1024;
+    unitIndex += 1;
+  }
+  return `${numberFormatter.format(value)} ${units[unitIndex]}`;
+}
+
+function formatMetric(metric: StatisticsMetric, kind: "bytes" | "count" | "percent" | "speed"): string {
+  if (!metric.available || metric.value === null) {
+    return "–";
+  }
+  if (kind === "bytes") {
+    return formatBytes(metric.value);
+  }
+  if (kind === "speed") {
+    return `${formatBytes(metric.value)}/s`;
+  }
+  if (kind === "percent") {
+    return `${numberFormatter.format(metric.value)} %`;
+  }
+  return numberFormatter.format(metric.value);
+}
+
+function providerScopeLabel(scope: StatisticsProviderScope | null): string {
+  if (scope === "current-queue") {
+    return "Aktuelle Queue";
+  }
+  if (scope === "today") {
+    return "Heute";
+  }
+  if (scope === "all") {
+    return "Gesamt";
+  }
+  return "Nicht verfügbar";
+}
+
+function emptyProviderMessage(model: StatisticsViewModel): string {
+  if (model.coverage === "unavailable") {
+    return model.message;
+  }
+  if (model.providerScope === "today") {
+    return "Heute wurden noch keine Providerbytes erfasst.";
+  }
+  if (model.providerScope === "all") {
+    return "Noch keine gespeicherten Providerbytes vorhanden.";
+  }
+  return "In der aktuellen Queue sind noch keine Providerwerte vorhanden.";
+}
+
+function StatisticsMetricCard({
+  label,
+  metric,
+  kind
+}: {
+  label: string;
+  metric: StatisticsMetric;
+  kind: "bytes" | "count" | "percent" | "speed";
+}): ReactElement {
+  return (
+    <article className={`statistics-kpi${metric.tone === "danger" ? " statistics-kpi-danger" : ""}`}>
+      <span className="statistics-kpi-label">{label}</span>
+      <strong className="statistics-kpi-value">{formatMetric(metric, kind)}</strong>
+      <span className="statistics-kpi-source">{metric.sourceLabel}</span>
+    </article>
+  );
+}
+
+export function StatisticsSidebar({ model, actions }: Pick<StatisticsViewProps, "model" | "actions">): ReactElement {
+  return (
+    <nav aria-label="Statistik-Zeitraum" className="statistics-sidebar" data-visual-region="statistics-sidebar">
+      <strong className="statistics-sidebar-heading">Zeitraum</strong>
+      <div className="statistics-range-list">
+        {rangeItems.map((item) => (
+          <button
+            aria-current={model.range === item.id ? "page" : undefined}
+            className={`statistics-range${model.range === item.id ? " statistics-range-active" : ""}`}
+            key={item.id}
+            onClick={() => actions.onRangeChange(item.id)}
+            type="button"
+          >{item.label}</button>
+        ))}
+      </div>
+      <p className="statistics-sidebar-message">{model.message}</p>
+    </nav>
+  );
+}
+
+export function StatisticsSidebarStatus({ model }: Pick<StatisticsViewProps, "model">): ReactElement | null {
+  const metrics = model.metrics;
+  const rows = [
+    metrics.downloadedBytes.available ? `Daten: ${formatMetric(metrics.downloadedBytes, "bytes")}` : null,
+    metrics.files.available ? `Dateien: ${formatMetric(metrics.files, "count")}` : null,
+    metrics.successRate.available ? `Erfolg: ${formatMetric(metrics.successRate, "percent")}` : null,
+    metrics.errors.available ? `Fehler: ${formatMetric(metrics.errors, "count")}` : null,
+    model.providerScope ? `Provider: ${model.providers.length}` : null
+  ].filter((value): value is string => value !== null);
+  if (rows.length === 0) {
+    return null;
+  }
+  return (
+    <div className="statistics-sidebar-status">
+      {rows.map((row) => <span key={row}>{row}</span>)}
+    </div>
+  );
+}
+
+export function StatisticsContent({ model, actions, chart }: StatisticsViewProps): ReactElement {
+  return (
+    <section aria-label="Statistik-Dashboard" className="statistics-content">
+      <header className="statistics-heading">
+        <div>
+          <h2>Statistiken</h2>
+          <p>{model.message}</p>
+        </div>
+        <div aria-label="Statistiken zurücksetzen" className="statistics-reset-actions">
+          <button className="statistics-reset" onClick={actions.onResetSession} type="button">Sitzung zurücksetzen</button>
+          <button className="statistics-reset" onClick={actions.onResetAll} type="button">Gesamt zurücksetzen</button>
+          <button
+            className="statistics-reset statistics-reset-danger"
+            disabled={!model.errorResetAvailable}
+            onClick={actions.onResetErrors}
+            type="button"
+          >Fehler zurücksetzen</button>
+        </div>
+      </header>
+
+      <div className="statistics-kpis" data-visual-region="statistics-kpis">
+        <StatisticsMetricCard kind="bytes" label="Datenmenge" metric={model.metrics.downloadedBytes} />
+        <StatisticsMetricCard kind="count" label="Dateien" metric={model.metrics.files} />
+        <StatisticsMetricCard kind="percent" label="Erfolgsquote" metric={model.metrics.successRate} />
+        <StatisticsMetricCard kind="speed" label="Durchschnitt" metric={model.metrics.averageSpeedBps} />
+        <StatisticsMetricCard kind="count" label="Fehler" metric={model.metrics.errors} />
+      </div>
+
+      <div className="statistics-detail-grid">
+        <section className="statistics-chart" data-visual-region="statistics-chart">
+          <div className="statistics-section-heading">
+            <h3>Bandbreitenverlauf</h3>
+            <span>Live aus der aktuellen Renderer-Sitzung</span>
+          </div>
+          <div className="statistics-chart-canvas">{chart}</div>
+        </section>
+
+        <section className="statistics-providers">
+          <div className="statistics-section-heading">
+            <h3>Provider</h3>
+            <span>{providerScopeLabel(model.providerScope)}</span>
+          </div>
+          <div aria-label="Provider-Nutzung" className="statistics-provider-table" role="table">
+            <div className="statistics-provider-header" role="row">
+              <span role="columnheader">Provider</span>
+              <span role="columnheader">Daten</span>
+              <span role="columnheader">Ergebnisse</span>
+            </div>
+            <div className="statistics-provider-body" role="rowgroup">
+              {model.providers.length > 0 ? model.providers.map((provider) => (
+                <div className="statistics-provider-row" key={provider.id} role="row">
+                  <span className="statistics-provider-name" role="cell">{provider.label}</span>
+                  <span role="cell">{formatBytes(provider.bytes)}</span>
+                  <span className={provider.failed && provider.failed > 0 ? "statistics-provider-errors" : undefined} role="cell">
+                    {provider.completed === null || provider.failed === null
+                      ? "–"
+                      : `${provider.completed} fertig · ${provider.failed} Fehler`}
+                  </span>
+                </div>
+              )) : (
+                <div className="statistics-provider-empty" role="row">
+                  <span aria-colspan={3} role="cell">{emptyProviderMessage(model)}</span>
+                </div>
+              )}
+            </div>
+          </div>
+        </section>
+      </div>
+    </section>
+  );
+}
+
+export function StatisticsView({ model, actions, chart }: StatisticsViewProps): ReactElement {
+  return (
+    <div className="statistics-composed-view">
+      <StatisticsSidebar actions={actions} model={model} />
+      <StatisticsContent actions={actions} chart={chart} model={model} />
+    </div>
+  );
+}

src/renderer/views/statistics/statistics-model.ts

@@ -0,0 +1,280 @@
+import { getProviderUsageDayKey } from "../../../shared/provider-daily-limits";
+import type { DebridProvider, DownloadItem, DownloadSummary, UiSnapshot } from "../../../shared/types";
+
+export type StatisticsRange = "session" | "today" | "week" | "month" | "all";
+export type StatisticsCoverage = "partial" | "unavailable";
+export type StatisticsSessionState = "empty" | "idle" | "active" | "paused";
+export type StatisticsProviderScope = "current-queue" | "today" | "all";
+export type StatisticsMetricTone = "danger";
+
+export interface StatisticsMetric {
+  value: number | null;
+  available: boolean;
+  sourceLabel: string;
+  tone?: StatisticsMetricTone;
+}
+
+export interface StatisticsProviderRow {
+  id: DebridProvider;
+  label: string;
+  bytes: number;
+  completed: number | null;
+  failed: number | null;
+}
+
+export interface StatisticsMetrics {
+  downloadedBytes: StatisticsMetric;
+  files: StatisticsMetric;
+  successRate: StatisticsMetric;
+  averageSpeedBps: StatisticsMetric;
+  errors: StatisticsMetric;
+}
+
+export interface StatisticsViewModel {
+  range: StatisticsRange;
+  coverage: StatisticsCoverage;
+  message: string;
+  sessionState: StatisticsSessionState;
+  metrics: StatisticsMetrics;
+  providerScope: StatisticsProviderScope | null;
+  providers: StatisticsProviderRow[];
+  errorResetAvailable: boolean;
+}
+
+const providerLabels: Record<DebridProvider, string> = {
+  realdebrid: "Real-Debrid",
+  megadebrid: "Mega-Debrid",
+  "megadebrid-api": "Mega-Debrid API",
+  "megadebrid-web": "Mega-Debrid Web",
+  bestdebrid: "BestDebrid",
+  alldebrid: "AllDebrid",
+  ddownload: "DDownload",
+  onefichier: "1Fichier",
+  debridlink: "Debrid-Link",
+  linksnappy: "LinkSnappy"
+};
+
+const historicalUnavailableMessage = "Für diesen Zeitraum werden noch keine historischen Daten gespeichert.";
+
+function normalizeNonNegative(value: number): number {
+  return Number.isFinite(value) ? Math.max(0, value) : 0;
+}
+
+function normalizeCount(value: number): number {
+  return Math.floor(normalizeNonNegative(value));
+}
+
+function availableMetric(value: number, sourceLabel: string, tone?: StatisticsMetricTone): StatisticsMetric {
+  return {
+    value: normalizeNonNegative(value),
+    available: true,
+    sourceLabel,
+    ...(tone ? { tone } : {})
+  };
+}
+
+function unavailableMetric(sourceLabel: string): StatisticsMetric {
+  return {
+    value: null,
+    available: false,
+    sourceLabel
+  };
+}
+
+function sortProviderRows(rows: StatisticsProviderRow[]): StatisticsProviderRow[] {
+  return rows.sort((left, right) => right.bytes - left.bytes || left.id.localeCompare(right.id));
+}
+
+function deriveSessionState(snapshot: UiSnapshot): StatisticsSessionState {
+  if (snapshot.session.paused) {
+    return "paused";
+  }
+  if (snapshot.session.running) {
+    return "active";
+  }
+  const hasItems = Object.keys(snapshot.session.items).length > 0;
+  const summary = snapshot.summary;
+  const hasSummary = Boolean(summary && normalizeCount(summary.success) + normalizeCount(summary.failed) + normalizeCount(summary.cancelled) > 0);
+  return hasItems || hasSummary ? "idle" : "empty";
+}
+
+function countQueueResults(items: DownloadItem[]): { completed: number; failed: number } {
+  let completed = 0;
+  let failed = 0;
+  for (const item of items) {
+    if (item.status === "completed") {
+      completed += 1;
+    } else if (item.status === "failed") {
+      failed += 1;
+    }
+  }
+  return { completed, failed };
+}
+
+function countSummaryResults(summary: DownloadSummary): { completed: number; failed: number } {
+  return {
+    completed: normalizeCount(summary.success),
+    failed: normalizeCount(summary.failed)
+  };
+}
+
+function successRateMetric(completed: number, failed: number, sourceLabel: string): StatisticsMetric {
+  const terminal = completed + failed;
+  return terminal > 0
+    ? availableMetric((completed / terminal) * 100, sourceLabel)
+    : unavailableMetric("Keine abgeschlossenen oder fehlgeschlagenen Ergebnisse");
+}
+
+function deriveQueueProviders(items: DownloadItem[]): StatisticsProviderRow[] {
+  const providers = new Map<DebridProvider, StatisticsProviderRow>();
+  for (const item of items) {
+    if (!item.provider) {
+      continue;
+    }
+    const existing = providers.get(item.provider);
+    const row = existing ?? {
+      id: item.provider,
+      label: item.providerLabel?.trim() || providerLabels[item.provider],
+      bytes: 0,
+      completed: 0,
+      failed: 0
+    };
+    if (!existing && item.providerLabel?.trim()) {
+      row.label = item.providerLabel.trim();
+    }
+    row.bytes += normalizeNonNegative(item.downloadedBytes);
+    if (item.status === "completed") {
+      row.completed = (row.completed ?? 0) + 1;
+    } else if (item.status === "failed") {
+      row.failed = (row.failed ?? 0) + 1;
+    }
+    providers.set(item.provider, row);
+  }
+  return sortProviderRows([...providers.values()]);
+}
+
+function deriveUsageProviders(usage: Partial<Record<DebridProvider, number>>): StatisticsProviderRow[] {
+  const rows: StatisticsProviderRow[] = [];
+  for (const [id, rawBytes] of Object.entries(usage) as Array<[DebridProvider, number | undefined]>) {
+    const bytes = normalizeNonNegative(rawBytes ?? 0);
+    if (bytes <= 0 || !providerLabels[id]) {
+      continue;
+    }
+    rows.push({
+      id,
+      label: providerLabels[id],
+      bytes,
+      completed: null,
+      failed: null
+    });
+  }
+  return sortProviderRows(rows);
+}
+
+function sumProviderBytes(rows: StatisticsProviderRow[]): number {
+  return rows.reduce((total, row) => total + row.bytes, 0);
+}
+
+function buildUnavailableMetrics(): StatisticsMetrics {
+  return {
+    downloadedBytes: unavailableMetric(historicalUnavailableMessage),
+    files: unavailableMetric(historicalUnavailableMessage),
+    successRate: unavailableMetric(historicalUnavailableMessage),
+    averageSpeedBps: unavailableMetric(historicalUnavailableMessage),
+    errors: unavailableMetric(historicalUnavailableMessage)
+  };
+}
+
+export function buildStatisticsViewModel(
+  snapshot: UiSnapshot,
+  range: StatisticsRange,
+  nowMs = Date.now()
+): StatisticsViewModel {
+  const sessionState = deriveSessionState(snapshot);
+
+  if (range === "week" || range === "month") {
+    return {
+      range,
+      coverage: "unavailable",
+      message: historicalUnavailableMessage,
+      sessionState,
+      metrics: buildUnavailableMetrics(),
+      providerScope: null,
+      providers: [],
+      errorResetAvailable: false
+    };
+  }
+
+  if (range === "today") {
+    const isCurrentDay = snapshot.settings.providerDailyUsageDay === getProviderUsageDayKey(nowMs);
+    const providers = isCurrentDay ? deriveUsageProviders(snapshot.settings.providerDailyUsageBytes) : [];
+    return {
+      range,
+      coverage: "partial",
+      message: "Heutige Daten stammen aus den lokalen Provider-Nutzungszählern des aktuellen Kalendertags.",
+      sessionState,
+      metrics: {
+        downloadedBytes: availableMetric(sumProviderBytes(providers), "Provider-Nutzung heute"),
+        files: unavailableMetric("Dateianzahlen werden nicht tagesweise gespeichert"),
+        successRate: unavailableMetric("Ergebnisse werden nicht tagesweise gespeichert"),
+        averageSpeedBps: unavailableMetric("Durchschnittsgeschwindigkeit wird nicht tagesweise gespeichert"),
+        errors: unavailableMetric("Fehler werden nicht tagesweise gespeichert")
+      },
+      providerScope: "today",
+      providers,
+      errorResetAvailable: false
+    };
+  }
+
+  if (range === "all") {
+    const providers = deriveUsageProviders(snapshot.settings.providerTotalUsageBytes);
+    return {
+      range,
+      coverage: "partial",
+      message: "Gesamtwerte stammen aus dauerhaft gespeicherten Zählern. Ergebnisse und Geschwindigkeiten werden nicht historisch gespeichert.",
+      sessionState,
+      metrics: {
+        downloadedBytes: availableMetric(snapshot.stats.totalDownloadedAllTime, "Gesamtzähler"),
+        files: availableMetric(snapshot.stats.totalFilesAllTime, "Gesamtzähler"),
+        successRate: unavailableMetric("Ergebnisse werden nicht dauerhaft gespeichert"),
+        averageSpeedBps: unavailableMetric("Durchschnittsgeschwindigkeit wird nicht dauerhaft gespeichert"),
+        errors: unavailableMetric("Fehler werden nicht dauerhaft gespeichert")
+      },
+      providerScope: "all",
+      providers,
+      errorResetAvailable: false
+    };
+  }
+
+  const items = Object.values(snapshot.session.items);
+  const queueResults = countQueueResults(items);
+  const runInProgress = snapshot.session.running || snapshot.session.paused;
+  const useSummary = !runInProgress && snapshot.summary !== null;
+  const results = useSummary ? countSummaryResults(snapshot.summary as DownloadSummary) : queueResults;
+  const resultSource = useSummary ? "Letzter beendeter Lauf" : "Aktuelle Queue";
+  const failed = results.failed;
+  const summaryAverage = useSummary && results.completed + results.failed > 0
+    ? availableMetric((snapshot.summary as DownloadSummary).averageSpeedBps, "Letzter beendeter Lauf")
+    : unavailableMetric(runInProgress
+      ? "Während des laufenden Durchgangs nicht als Gesamtwert verfügbar"
+      : "Kein beendeter Lauf mit Ergebnissen verfügbar");
+
+  return {
+    range,
+    coverage: "partial",
+    message: useSummary
+      ? "Sitzungszähler und Ergebnisse des zuletzt beendeten Laufs werden angezeigt."
+      : "Sitzungszähler und Ergebnisse der aktuellen Queue werden angezeigt.",
+    sessionState,
+    metrics: {
+      downloadedBytes: availableMetric(snapshot.stats.totalDownloaded, "Sitzungszähler"),
+      files: availableMetric(snapshot.stats.totalFilesSession, "Sitzungszähler"),
+      successRate: successRateMetric(results.completed, failed, resultSource),
+      averageSpeedBps: summaryAverage,
+      errors: availableMetric(failed, resultSource, failed > 0 ? "danger" : undefined)
+    },
+    providerScope: "current-queue",
+    providers: deriveQueueProviders(items),
+    errorResetAvailable: queueResults.failed > 0
+  };
+}

src/renderer/views/statistics/statistics.css

@@ -0,0 +1,370 @@
+.statistics-sidebar,
+.statistics-content,
+.statistics-sidebar-status {
+  user-select: none;
+}
+
+.statistics-sidebar {
+  display: flex;
+  min-width: 0;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.statistics-sidebar-heading {
+  color: var(--ui-text-secondary);
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 16px;
+  text-transform: uppercase;
+}
+
+.statistics-range-list {
+  display: grid;
+  gap: 4px;
+}
+
+.statistics-range {
+  display: flex;
+  width: 100%;
+  min-height: 36px;
+  padding: 8px 10px;
+  align-items: center;
+  border: 1px solid transparent;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+  font: inherit;
+  font-weight: 500;
+  text-align: left;
+}
+
+.statistics-range:hover {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.statistics-range-active {
+  border-color: var(--ui-border);
+  background: var(--ui-active);
+  color: var(--ui-text);
+}
+
+.statistics-range:focus-visible,
+.statistics-reset:focus-visible {
+  outline: 2px solid var(--ui-accent);
+  outline-offset: 2px;
+}
+
+.statistics-sidebar-message {
+  margin: 4px 0 0;
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  line-height: 18px;
+}
+
+.statistics-sidebar-status {
+  display: contents;
+}
+
+.statistics-content {
+  display: grid;
+  min-width: 0;
+  min-height: 100%;
+  align-content: start;
+  gap: 16px;
+  padding: 20px 24px 24px;
+  overflow: auto;
+}
+
+.statistics-heading {
+  display: flex;
+  min-width: 0;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 24px;
+}
+
+.statistics-heading h2,
+.statistics-section-heading h3 {
+  margin: 0;
+  color: var(--ui-text);
+}
+
+.statistics-heading h2 {
+  font-size: 20px;
+  font-weight: 600;
+  line-height: 28px;
+}
+
+.statistics-heading p {
+  max-width: 760px;
+  margin: 4px 0 0;
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  line-height: 18px;
+}
+
+.statistics-reset-actions {
+  display: flex;
+  flex: 0 0 auto;
+  flex-wrap: wrap;
+  justify-content: flex-end;
+  gap: 8px;
+}
+
+.statistics-reset {
+  min-height: 36px;
+  padding: 7px 12px;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  background: var(--ui-input);
+  color: var(--ui-text-secondary);
+  cursor: pointer;
+  font: inherit;
+  font-weight: 500;
+}
+
+.statistics-reset:hover:not(:disabled) {
+  background: var(--ui-hover);
+  color: var(--ui-text);
+}
+
+.statistics-reset-danger {
+  color: var(--ui-danger);
+}
+
+.statistics-reset:disabled {
+  color: var(--ui-text-muted);
+  cursor: not-allowed;
+  opacity: 0.6;
+}
+
+.statistics-kpis {
+  display: grid;
+  min-width: 0;
+  grid-template-columns: repeat(5, minmax(0, 1fr));
+  gap: 8px;
+}
+
+.statistics-kpi {
+  display: flex;
+  min-width: 0;
+  min-height: 116px;
+  padding: 14px 16px;
+  flex-direction: column;
+  justify-content: space-between;
+  gap: 8px;
+  border: 1px solid var(--ui-border);
+  border-radius: 8px;
+  background: var(--ui-surface);
+}
+
+.statistics-kpi-label {
+  color: var(--ui-text-secondary);
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 16px;
+}
+
+.statistics-kpi-value {
+  min-width: 0;
+  color: var(--ui-text);
+  font-size: clamp(20px, 1.6vw, 28px);
+  font-weight: 600;
+  line-height: 1.2;
+  white-space: nowrap;
+}
+
+.statistics-kpi-danger .statistics-kpi-value {
+  color: var(--ui-danger);
+}
+
+.statistics-kpi-source {
+  min-height: 32px;
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  line-height: 16px;
+  overflow-wrap: anywhere;
+}
+
+.statistics-detail-grid {
+  display: grid;
+  min-width: 0;
+  grid-template-columns: minmax(0, 1.25fr) minmax(360px, 0.75fr);
+  gap: 16px;
+}
+
+.statistics-chart,
+.statistics-providers {
+  display: flex;
+  min-width: 0;
+  min-height: 340px;
+  padding: 16px;
+  flex-direction: column;
+  gap: 12px;
+  border: 1px solid var(--ui-border);
+  border-radius: 8px;
+  background: var(--ui-surface);
+}
+
+.statistics-section-heading {
+  display: flex;
+  min-width: 0;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 16px;
+}
+
+.statistics-section-heading h3 {
+  font-size: 16px;
+  font-weight: 600;
+  line-height: 22px;
+}
+
+.statistics-section-heading span {
+  color: var(--ui-text-muted);
+  font-size: 12px;
+  line-height: 16px;
+  text-align: right;
+}
+
+.statistics-chart-canvas {
+  min-width: 0;
+  min-height: 280px;
+  flex: 1 1 auto;
+}
+
+.statistics-chart-canvas .bandwidth-chart-container {
+  height: 100%;
+  min-height: 280px;
+  margin: 0;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+  background: var(--ui-input);
+}
+
+.statistics-provider-table {
+  display: flex;
+  min-width: 0;
+  flex: 1 1 auto;
+  flex-direction: column;
+  overflow: hidden;
+  border: 1px solid var(--ui-border);
+  border-radius: 6px;
+}
+
+.statistics-provider-header,
+.statistics-provider-row {
+  display: grid;
+  min-width: 0;
+  grid-template-columns: minmax(120px, 1fr) minmax(88px, 0.65fr) minmax(130px, 1fr);
+  align-items: center;
+  gap: 12px;
+}
+
+.statistics-provider-header {
+  min-height: 41px;
+  padding: 0 12px;
+  border-bottom: 1px solid var(--ui-border);
+  background: var(--ui-table-header);
+  color: var(--ui-text-secondary);
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 16px;
+}
+
+.statistics-provider-body {
+  min-height: 0;
+  flex: 1 1 auto;
+  overflow: auto;
+}
+
+.statistics-provider-row {
+  min-height: 48px;
+  padding: 8px 12px;
+  border-bottom: 1px solid var(--ui-border);
+  color: var(--ui-text-secondary);
+  font-size: 13px;
+  line-height: 18px;
+}
+
+.statistics-provider-row:last-child {
+  border-bottom: 0;
+}
+
+.statistics-provider-row:hover {
+  background: var(--ui-hover);
+}
+
+.statistics-provider-row > span {
+  min-width: 0;
+  overflow-wrap: anywhere;
+}
+
+.statistics-provider-name {
+  color: var(--ui-text);
+  font-weight: 600;
+}
+
+.statistics-provider-errors {
+  color: var(--ui-danger);
+}
+
+.statistics-provider-empty {
+  display: grid;
+  min-height: 180px;
+  padding: 24px;
+  place-items: center;
+  color: var(--ui-text-muted);
+  font-size: 13px;
+  line-height: 20px;
+  text-align: center;
+}
+
+.statistics-composed-view {
+  display: grid;
+  min-width: 0;
+  min-height: 0;
+  grid-template-columns: 270px minmax(0, 1fr);
+  gap: 8px;
+  overflow: hidden;
+}
+
+@media (max-width: 1500px) {
+  .statistics-composed-view {
+    grid-template-columns: 56px minmax(0, 1fr);
+  }
+
+  .statistics-sidebar {
+    overflow: hidden;
+  }
+
+  .statistics-kpis {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+
+  .statistics-detail-grid {
+    grid-template-columns: minmax(0, 1fr);
+  }
+}
+
+@media (max-width: 1120px) {
+  .statistics-content {
+    padding: 16px;
+  }
+
+  .statistics-heading {
+    flex-direction: column;
+  }
+
+  .statistics-reset-actions {
+    justify-content: flex-start;
+  }
+
+  .statistics-kpis {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+
+}

src/shared/ipc.ts

@@ -71,6 +71,7 @@ export const IPC_CHANNELS = {
   GET_HISTORY: "history:get",
   CLEAR_HISTORY: "history:clear",
   REMOVE_HISTORY_ENTRY: "history:remove-entry",
+  REVEAL_HISTORY_ENTRY: "history:reveal-entry",
   SET_PACKAGE_PRIORITY: "queue:set-package-priority",
   SKIP_ITEMS: "queue:skip-items",
   RESET_ITEMS: "queue:reset-items",

src/shared/preload-api.ts

@@ -9,6 +9,7 @@ import type {
   DuplicatePolicy,
   EnableRemoteDiagnosticsInput,
   HistoryEntry,
+  HistoryRevealResult,
   PackagePriority,
   RemoteDiagnosticsInfo,
   RendererErrorReport,
@@ -92,6 +93,7 @@ export interface ElectronApi {
   getHistory: () => Promise<HistoryEntry[]>;
   clearHistory: () => Promise<void>;
   removeHistoryEntry: (entryId: string) => Promise<void>;
+  revealHistoryEntry: (entryId: string) => Promise<HistoryRevealResult>;
   setPackagePriority: (packageId: string, priority: PackagePriority) => Promise<void>;
   skipItems: (itemIds: string[]) => Promise<void>;
   resetItems: (itemIds: string[]) => Promise<void>;

src/shared/types.ts

@@ -529,6 +529,17 @@ export interface HistoryState {
   maxEntries: number;
 }
 
+export type HistoryRevealFailureReason =
+  | "entry-not-found"
+  | "invalid-output-dir"
+  | "output-dir-missing"
+  | "output-dir-not-directory"
+  | "open-failed";
+
+export type HistoryRevealResult =
+  | { ok: true }
+  | { ok: false; reason: HistoryRevealFailureReason };
+
 export interface RendererErrorReport {
   kind: "error" | "unhandledrejection" | "react";
   message: string;

tests/account-layout.test.ts

@@ -1,15 +1,27 @@
 import { readFileSync } from "node:fs";
 import { describe, expect, it } from "vitest";
 
-const appSource = readFileSync(new URL("../src/renderer/App.tsx", import.meta.url), "utf8");
-const styles = readFileSync(new URL("../src/renderer/styles.css", import.meta.url), "utf8");
+const workspaceSource = readFileSync(
+  new URL("../src/renderer/views/settings/AccountWorkspace.tsx", import.meta.url),
+  "utf8"
+);
+const styles = readFileSync(
+  new URL("../src/renderer/views/settings/settings.css", import.meta.url),
+  "utf8"
+);
 
 describe("account management layout", () => {
   it("keeps both account tabs inside the same fixed content row", () => {
-    expect(appSource).toContain('<div className="account-settings-layout">');
-    expect(appSource).not.toContain("account-settings-layout ${accountManagementTab}");
-    expect(appSource).toContain('<div className="account-rules-panel" hidden={accountManagementTab !== "rules"}>');
-    expect(styles).not.toMatch(/\.account-settings-layout\.rules\s*{/);
-    expect(styles).toMatch(/\.account-rules-panel\s*{[^}]*min-width:\s*0;[^}]*min-height:\s*0;[^}]*overflow-y:\s*auto;/s);
+    expect(workspaceSource).toContain('<div className="settings-account-workspace">');
+    expect(workspaceSource.match(/className="settings-account-panel"/g)).toHaveLength(2);
+    expect(workspaceSource).toContain('hidden={model.activePanel !== "overview"}');
+    expect(workspaceSource).toContain('hidden={model.activePanel !== "rules"}');
+    expect(styles).toMatch(
+      /\.settings-account-workspace\s*{[^}]*grid-template-rows:\s*auto auto minmax\(0, 1fr\);[^}]*min-width:\s*0;[^}]*min-height:\s*0;/s
+    );
+    expect(styles).toMatch(
+      /\.settings-account-panel\s*{[^}]*width:\s*100%;[^}]*min-width:\s*0;[^}]*min-height:\s*0;/s
+    );
+    expect(styles).toMatch(/\.settings-account-rules\s*{[^}]*min-width:\s*0;[^}]*overflow-y:\s*auto;/s);
   });
 });

tests/app-shell.test.tsx

@@ -0,0 +1,87 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import { AvatarMenu, getAvatarMenuKeyboardAction } from "../src/renderer/shell/AvatarMenu";
+import { AppShell } from "../src/renderer/shell/AppShell";
+import { buildMainNavigation } from "../src/renderer/shell/shell-model";
+
+describe("desktop shell", () => {
+  it("exposes all five views with exactly one active item", () => {
+    const items = buildMainNavigation("downloads");
+    expect(items.map((item) => item.id)).toEqual(["downloads", "collector", "settings", "history", "statistics"]);
+    expect(items.filter((item) => item.active)).toHaveLength(1);
+  });
+
+  it("renders context regions without global placeholders", () => {
+    const html = renderToStaticMarkup(
+      <AppShell
+        activeView="downloads"
+        onViewChange={() => {}}
+        sidebar={<div>Filter</div>}
+        sidebarStatus={<div>2 Downloads</div>}
+        headerActions={null}
+        toolbar={<div>Aktionen</div>}
+        footer={<div>1–1 von 1</div>}
+        contextInfo={null}
+        sidebarCollapsed={false}
+        onSidebarCollapsedChange={() => {}}
+      >
+        <div>Inhalt</div>
+      </AppShell>
+    );
+    expect(html).toContain("data-ui-region=\"header\"");
+    expect(html).toContain("data-ui-region=\"sidebar\"");
+    expect(html).toContain("data-ui-region=\"sidebar-status\"");
+    expect(html).toContain("data-ui-region=\"main\"");
+    expect(html).toContain("1–1 von 1");
+  });
+
+  it("does not reserve a collapsed sidebar column when sidebar slots are empty", () => {
+    const html = renderToStaticMarkup(
+      <AppShell
+        activeView="settings"
+        onViewChange={() => {}}
+        sidebar={null}
+        sidebarStatus={null}
+        headerActions={null}
+        toolbar={null}
+        footer={null}
+        contextInfo={null}
+        sidebarCollapsed
+        onSidebarCollapsedChange={() => {}}
+      >
+        <div>Einstellungen</div>
+      </AppShell>
+    );
+    expect(html).not.toContain("has-collapsed-sidebar");
+    expect(html).not.toContain("data-ui-region=\"sidebar\"");
+    expect(html).not.toContain("data-ui-region=\"toolbar\"");
+    expect(html).not.toContain("data-ui-region=\"footer\"");
+  });
+
+  it("renders the account popover only while open", () => {
+    expect(renderToStaticMarkup(<AvatarMenu open={false} accountLabel="konto@example.test" actions={[]} onClose={() => {}} />)).toBe("");
+    const html = renderToStaticMarkup(
+      <AvatarMenu
+        open
+        accountLabel="konto@example.test"
+        actions={[{ id: "logout", label: "Abmelden", danger: true, onSelect: () => {} }]}
+        onClose={() => {}}
+      />
+    );
+    expect(html).toContain("role=\"menu\"");
+    expect(html).toContain("aria-label=\"Kontomenü\"");
+    expect(html).toContain("konto@example.test");
+    expect(html).toContain("Abmelden");
+    expect(html).toContain("autofocus=\"\"");
+  });
+
+  it("maps menu keys to wrapped focus movement and closing", () => {
+    expect(getAvatarMenuKeyboardAction("ArrowDown", 0, 3)).toEqual({ type: "focus", index: 1 });
+    expect(getAvatarMenuKeyboardAction("ArrowDown", 2, 3)).toEqual({ type: "focus", index: 0 });
+    expect(getAvatarMenuKeyboardAction("ArrowUp", 0, 3)).toEqual({ type: "focus", index: 2 });
+    expect(getAvatarMenuKeyboardAction("Home", 2, 3)).toEqual({ type: "focus", index: 0 });
+    expect(getAvatarMenuKeyboardAction("End", 0, 3)).toEqual({ type: "focus", index: 2 });
+    expect(getAvatarMenuKeyboardAction("Escape", 1, 3)).toEqual({ type: "close" });
+    expect(getAvatarMenuKeyboardAction("Tab", 1, 3)).toBeNull();
+  });
+});

tests/collector-view.test.tsx

@@ -0,0 +1,257 @@
+import { isValidElement, type ReactElement, type ReactNode } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import {
+  mergeCollectorDraftText,
+  planCollectorTabRemoval,
+  planCollectorTextReplacement
+} from "../src/renderer/App";
+import {
+  buildCollectorRows,
+  buildCollectorViewModel,
+  type CollectorSourceTab
+} from "../src/renderer/views/collector/collector-model";
+import {
+  CollectorInputDialog,
+  CollectorContent,
+  CollectorToolbar,
+  CollectorView,
+  type CollectorViewActions
+} from "../src/renderer/views/collector/CollectorView";
+
+function visitElements(node: ReactNode, visit: (element: ReactElement) => void): void {
+  if (Array.isArray(node)) {
+    node.forEach((child) => visitElements(child, visit));
+    return;
+  }
+  if (!isValidElement(node)) {
+    return;
+  }
+  visit(node);
+  visitElements(node.props.children, visit);
+  visitElements(node.props.actions, visit);
+}
+
+function findElement(node: ReactNode, predicate: (element: ReactElement) => boolean): ReactElement {
+  let result: ReactElement | null = null;
+  visitElements(node, (element) => {
+    if (!result && predicate(element)) {
+      result = element;
+    }
+  });
+  if (!result) {
+    throw new Error("Element not found");
+  }
+  return result;
+}
+
+function findButton(node: ReactNode, label: string): ReactElement {
+  return findElement(node, (element) => element.type === "button" && element.props.children === label);
+}
+
+function createActions(overrides: Partial<CollectorViewActions> = {}): CollectorViewActions {
+  return {
+    onTabSelect: () => {},
+    onTabAdd: () => {},
+    onTabRemove: () => {},
+    onOpenInput: () => {},
+    onImportDlc: () => {},
+    onImportFile: () => {},
+    onExportQueue: () => {},
+    onSubmit: () => {},
+    onQueryChange: () => {},
+    onSelectionChange: () => {},
+    onRemoveSelected: () => {},
+    ...overrides
+  };
+}
+
+const populatedTabs: CollectorSourceTab[] = [
+  {
+    id: "tab-a",
+    name: "Sammlung A",
+    text: "https://example.test/a\n\n https://example.test/b "
+  }
+];
+
+describe("collector model", () => {
+  it("derives stable rows from non-empty raw lines without validating or regrouping them", () => {
+    const rows = buildCollectorRows(populatedTabs, "tab-a", "");
+
+    expect(rows).toHaveLength(2);
+    expect(rows.map((row) => row.id)).toEqual(["tab-a:0", "tab-a:2"]);
+    expect(rows.map((row) => row.originalLineIndex)).toEqual([0, 2]);
+    expect(rows.map((row) => row.value)).toEqual([
+      "https://example.test/a",
+      "https://example.test/b"
+    ]);
+    expect(rows[0].linkCount).toBe(2);
+    expect(rows[1].linkCount).toBe(2);
+  });
+
+  it("filters presentation rows while keeping source counts and original line identities", () => {
+    const model = buildCollectorViewModel(populatedTabs, "tab-a", "EXAMPLE.TEST/B", false, ["tab-a:0"]);
+
+    expect(model.rows.map((row) => row.id)).toEqual(["tab-a:2"]);
+    expect(model.tabs).toEqual([{ id: "tab-a", name: "Sammlung A", linkCount: 2 }]);
+    expect(model.selectedIds).toEqual(["tab-a:0"]);
+    expect(model.empty).toBe(false);
+  });
+
+  it("preserves clipboard and drop appends that arrive while an input draft is open", () => {
+    expect(mergeCollectorDraftText(
+      "https://example.test/old",
+      "https://example.test/old\nhttps://example.test/clipboard",
+      "https://example.test/edited"
+    )).toBe("https://example.test/edited\nhttps://example.test/clipboard");
+    expect(mergeCollectorDraftText("old", "old", "edited")).toBe("edited");
+  });
+
+  it("moves the active identity to an existing neighbor before later appends arrive", () => {
+    const tabs: CollectorSourceTab[] = [
+      { id: "tab-a", name: "Sammlung A", text: "a" },
+      { id: "tab-b", name: "Sammlung B", text: "b" },
+      { id: "tab-c", name: "Sammlung C", text: "c" }
+    ];
+
+    expect(planCollectorTabRemoval(tabs, "tab-b", "tab-b")).toEqual({
+      tabs: [tabs[0], tabs[2]],
+      activeTabId: "tab-a"
+    });
+    expect(planCollectorTabRemoval(tabs, "tab-c", "tab-a")).toEqual({
+      tabs: [tabs[1], tabs[2]],
+      activeTabId: "tab-c"
+    });
+  });
+
+  it("invalidates positional row selection whenever raw text is replaced", () => {
+    const tabs: CollectorSourceTab[] = [
+      { id: "tab-a", name: "Sammlung A", text: "old-a\nold-b" },
+      { id: "tab-b", name: "Sammlung B", text: "untouched" }
+    ];
+
+    expect(planCollectorTextReplacement(tabs, "tab-a", "new-a")).toEqual({
+      tabs: [
+        { id: "tab-a", name: "Sammlung A", text: "new-a" },
+        tabs[1]
+      ],
+      selectedIds: []
+    });
+  });
+});
+
+describe("CollectorView", () => {
+  it("keeps empty, busy and error states inside the same table body", () => {
+    const empty = renderToStaticMarkup(
+      <CollectorView
+        actions={createActions()}
+        model={buildCollectorViewModel([{ id: "tab-a", name: "Sammlung A", text: "" }], "tab-a", "", false, [])}
+      />
+    );
+    const busy = renderToStaticMarkup(
+      <CollectorView
+        actions={createActions()}
+        model={{ ...buildCollectorViewModel([], "", "", true, []), error: "" }}
+      />
+    );
+    const failed = renderToStaticMarkup(
+      <CollectorView
+        actions={createActions()}
+        model={{ ...buildCollectorViewModel([], "", "", false, []), error: "Import fehlgeschlagen" }}
+      />
+    );
+
+    for (const [html, state] of [
+      [empty, "Noch keine Links"],
+      [busy, "Links werden verarbeitet"],
+      [failed, "Import fehlgeschlagen"]
+    ]) {
+      expect(html.indexOf(state)).toBeGreaterThan(html.indexOf("data-visual-region=\"collector-table-body\""));
+    }
+    expect(empty).toContain("data-visual-region=\"collector-empty-state\"");
+    expect(empty).not.toContain("aria-label=\"Seitennavigation\"");
+  });
+
+  it("renders compact occupied rows and removes the empty marker", () => {
+    const html = renderToStaticMarkup(
+      <CollectorView
+        actions={createActions()}
+        model={buildCollectorViewModel(populatedTabs, "tab-a", "", false, [])}
+      />
+    );
+
+    expect(html.match(/class=\"collector-row(?: is-selected)?\"/g)).toHaveLength(2);
+    expect(html).not.toContain("data-visual-region=\"collector-empty-state\"");
+    expect(html).toContain("data-visual-region=\"collector-sidebar\"");
+    expect(html).toContain("data-visual-region=\"collector-toolbar\"");
+    expect(html).toContain("data-visual-region=\"collector-table-body\"");
+    expect(html).not.toContain("data-visual-region=\"downloads-toolbar\"");
+    expect(html).not.toContain("aria-label=\"Seitennavigation\"");
+  });
+
+  it("separates local input, queue submission, search, selection and local removal callbacks", () => {
+    let inputOpens = 0;
+    let queueSubmits = 0;
+    let query = "";
+    let selected = "";
+    let removals = 0;
+    const actions = createActions({
+      onOpenInput: () => { inputOpens += 1; },
+      onSubmit: () => { queueSubmits += 1; },
+      onQueryChange: (value) => { query = value; },
+      onSelectionChange: (rowId) => { selected = rowId; },
+      onRemoveSelected: () => { removals += 1; }
+    });
+    const toolbar = CollectorToolbar({
+      actions,
+      model: buildCollectorViewModel(populatedTabs, "tab-a", "", false, ["tab-a:0"])
+    });
+    const content = CollectorContent({
+      actions,
+      model: buildCollectorViewModel(populatedTabs, "tab-a", "", false, ["tab-a:0"])
+    });
+
+    findButton(toolbar, "Links hinzufügen").props.onClick();
+    expect(inputOpens).toBe(1);
+    expect(queueSubmits).toBe(0);
+
+    findButton(toolbar, "An Downloads übergeben").props.onClick();
+    expect(queueSubmits).toBe(1);
+
+    const search = findElement(toolbar, (element) => element.props.label === "Links durchsuchen");
+    search.props.onChange({ target: { value: "release" } });
+    expect(query).toBe("release");
+
+    const checkbox = findElement(content, (element) => element.type === "input" && element.props["aria-label"] === "Link auswählen");
+    checkbox.props.onChange();
+    findButton(toolbar, "Auswahl entfernen").props.onClick();
+    expect(selected).toBe("tab-a:0");
+    expect(removals).toBe(1);
+    expect(queueSubmits).toBe(1);
+  });
+
+  it("names the input dialog and commits only through the local draft callback", () => {
+    let value = "";
+    let commits = 0;
+    const dialog = CollectorInputDialog({
+      open: true,
+      tabName: "Sammlung A",
+      value,
+      onChange: (next) => { value = next; },
+      onClose: () => {},
+      onCommit: () => { commits += 1; }
+    });
+    const html = renderToStaticMarkup(dialog);
+
+    expect(html).toContain("role=\"dialog\"");
+    expect(html).toContain("aria-label=\"Links\"");
+    expect(html).toContain("Links hinzufügen");
+    expect(html).toContain("Übernehmen");
+
+    const textbox = findElement(dialog, (element) => element.type === "textarea" && element.props["aria-label"] === "Links");
+    textbox.props.onChange({ target: { value: "https://example.test/new" } });
+    findButton(dialog, "Übernehmen").props.onClick();
+    expect(value).toBe("https://example.test/new");
+    expect(commits).toBe(1);
+  });
+});

tests/context-menu.test.tsx

@@ -0,0 +1,102 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it, vi } from "vitest";
+import {
+  clampContextMenuPosition,
+  ContextMenu,
+  getContextMenuKeyboardAction,
+  getContextMenuSubmenuKeyboardAction,
+  getContextSubmenuPosition
+} from "../src/renderer/ui/ContextMenu";
+
+describe("ContextMenu", () => {
+  it("renders menu semantics and marks buttons as menu items", () => {
+    const html = renderToStaticMarkup(
+      <ContextMenu ariaLabel="Aktionen" onClose={() => {}} open x={40} y={60}>
+        <button>Öffnen</button>
+        <button disabled>Gesperrt</button>
+      </ContextMenu>
+    );
+
+    expect(html).toContain("role=\"menu\"");
+    expect(html).toContain("aria-label=\"Aktionen\"");
+    expect(html.match(/role=\"menuitem\"/g)).toHaveLength(2);
+    expect(html).toContain("tabindex=\"-1\"");
+  });
+
+  it("server-renders without layout-effect warnings", () => {
+    const error = vi.spyOn(console, "error").mockImplementation(() => {});
+
+    renderToStaticMarkup(
+      <ContextMenu onClose={() => {}} open x={0} y={0}>
+        <button>Öffnen</button>
+      </ContextMenu>
+    );
+
+    expect(error).not.toHaveBeenCalled();
+    error.mockRestore();
+  });
+
+  it("clamps every edge to the visible viewport", () => {
+    expect(clampContextMenuPosition(790, 590, 220, 180, 800, 600)).toEqual({ x: 580, y: 420 });
+    expect(clampContextMenuPosition(-12, -8, 220, 180, 800, 600)).toEqual({ x: 0, y: 0 });
+    expect(clampContextMenuPosition(40, 60, 220, 180, 800, 600)).toEqual({ x: 40, y: 60 });
+  });
+
+  it("navigates enabled items, activates Enter and closes only the menu on Escape", () => {
+    const enabled = [true, false, true, true];
+
+    expect(getContextMenuKeyboardAction("ArrowDown", 0, enabled)).toEqual({ type: "focus", index: 2 });
+    expect(getContextMenuKeyboardAction("ArrowDown", 3, enabled)).toEqual({ type: "focus", index: 0 });
+    expect(getContextMenuKeyboardAction("ArrowUp", 0, enabled)).toEqual({ type: "focus", index: 3 });
+    expect(getContextMenuKeyboardAction("Home", 3, enabled)).toEqual({ type: "focus", index: 0 });
+    expect(getContextMenuKeyboardAction("End", 0, enabled)).toEqual({ type: "focus", index: 3 });
+    expect(getContextMenuKeyboardAction("Enter", 2, enabled)).toEqual({ type: "activate", index: 2 });
+    expect(getContextMenuKeyboardAction("Escape", 2, enabled)).toEqual({ type: "close" });
+    expect(getContextMenuKeyboardAction("ArrowDown", -1, [false, false])).toBeNull();
+  });
+
+  it("opens and leaves submenus with standard keyboard commands", () => {
+    expect(getContextMenuSubmenuKeyboardAction("Enter", true, false)).toBe("open");
+    expect(getContextMenuSubmenuKeyboardAction("ArrowRight", true, false)).toBe("open");
+    expect(getContextMenuSubmenuKeyboardAction("ArrowLeft", false, true)).toBe("close");
+    expect(getContextMenuSubmenuKeyboardAction("Escape", false, true)).toBe("close");
+    expect(getContextMenuSubmenuKeyboardAction("ArrowDown", true, false)).toBeNull();
+  });
+
+  it("renders nested priority choices as an announced submenu", () => {
+    const html = renderToStaticMarkup(
+      <ContextMenu onClose={() => {}} open x={0} y={0}>
+        <div className="ctx-menu-sub">
+          <button aria-haspopup="menu">Priorität</button>
+          <div className="ctx-menu-sub-items" role="menu">
+            <button>Hoch</button>
+            <button>Standard</button>
+            <button>Niedrig</button>
+          </div>
+        </div>
+      </ContextMenu>
+    );
+
+    expect(html).toContain("aria-haspopup=\"menu\"");
+    expect(html.match(/role=\"menu\"/g)).toHaveLength(2);
+    expect(html.match(/role=\"menuitem\"/g)).toHaveLength(4);
+  });
+
+  it("places submenus inside the viewport on every edge", () => {
+    expect(getContextSubmenuPosition(
+      { left: 700, right: 790, top: 40 },
+      { width: 180, height: 150 },
+      { width: 800, height: 600 }
+    )).toEqual({ x: 520, y: 40 });
+    expect(getContextSubmenuPosition(
+      { left: 8, right: 98, top: 40 },
+      { width: 180, height: 150 },
+      { width: 800, height: 600 }
+    )).toEqual({ x: 98, y: 40 });
+    expect(getContextSubmenuPosition(
+      { left: 500, right: 590, top: 560 },
+      { width: 180, height: 150 },
+      { width: 800, height: 600 }
+    )).toEqual({ x: 590, y: 450 });
+  });
+});

tests/dialog.test.tsx

@@ -0,0 +1,88 @@
+import { createRef } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import {
+  Dialog,
+  getConnectedDialogRestoreTarget,
+  getDialogInitialFocusTarget,
+  getDialogKeyboardAction,
+  getDialogRestoreFocusTarget
+} from "../src/renderer/ui/Dialog";
+
+describe("Dialog", () => {
+  it("renders labelled modal semantics only while open", () => {
+    const closed = renderToStaticMarkup(
+      <Dialog actions={null} onClose={() => {}} open={false} title="Test">Body</Dialog>
+    );
+    const open = renderToStaticMarkup(
+      <Dialog actions={<button>OK</button>} description="Beschreibung" onClose={() => {}} open title="Test">Body</Dialog>
+    );
+
+    expect(closed).toBe("");
+    expect(open).toContain("role=\"dialog\"");
+    expect(open).toContain("aria-modal=\"true\"");
+    expect(open).toMatch(/aria-labelledby=\"[^\"]+\"/);
+    expect(open).toMatch(/aria-describedby=\"[^\"]+\"/);
+    expect(open).toContain("Beschreibung");
+    expect(open).toContain("Body");
+    expect(open).toContain("OK");
+  });
+
+  it("applies bounded account and update surfaces without changing the dialog contract", () => {
+    const account = renderToStaticMarkup(
+      <Dialog actions={null} initialFocusRef={createRef<HTMLButtonElement>()} onClose={() => {}} open size="account" title="Account">Body</Dialog>
+    );
+    const update = renderToStaticMarkup(
+      <Dialog actions={null} danger onClose={() => {}} open size="update" title="Update">Body</Dialog>
+    );
+
+    expect(account).toContain("md-dialog-size-account");
+    expect(update).toContain("md-dialog-size-update");
+    expect(update).toContain("is-danger");
+  });
+
+  it("traps forward and reverse tabbing and honors closable Escape", () => {
+    expect(getDialogKeyboardAction("Tab", false, -1, 4, true)).toEqual({ type: "focus", index: 0 });
+    expect(getDialogKeyboardAction("Tab", true, -1, 4, true)).toEqual({ type: "focus", index: 3 });
+    expect(getDialogKeyboardAction("Tab", false, 3, 4, true)).toEqual({ type: "focus", index: 0 });
+    expect(getDialogKeyboardAction("Tab", true, 0, 4, true)).toEqual({ type: "focus", index: 3 });
+    expect(getDialogKeyboardAction("Tab", false, 1, 4, true)).toBeNull();
+    expect(getDialogKeyboardAction("Escape", false, 0, 4, true)).toEqual({ type: "close" });
+    expect(getDialogKeyboardAction("Escape", false, 0, 4, false)).toBeNull();
+  });
+
+  it("keeps existing autofocus targets before falling back to the dialog surface", () => {
+    const explicitTarget = {} as HTMLElement;
+    const autofocusTarget = {} as HTMLElement;
+    const activeAutofocusTarget = {} as HTMLElement;
+    const dialog = {
+      contains: (target: HTMLElement) => target === activeAutofocusTarget,
+      querySelector: (selector: string) => selector === "[autofocus]" ? autofocusTarget : null
+    } as unknown as HTMLElement;
+    const fallbackDialog = { querySelector: () => null } as unknown as HTMLElement;
+
+    expect(getDialogInitialFocusTarget(dialog, explicitTarget)).toBe(explicitTarget);
+    expect(getDialogInitialFocusTarget(dialog, null, activeAutofocusTarget)).toBe(activeAutofocusTarget);
+    expect(getDialogInitialFocusTarget(dialog, null)).toBe(autofocusTarget);
+    expect(getDialogInitialFocusTarget(fallbackDialog, null)).toBe(fallbackDialog);
+  });
+
+  it("captures the opener before autofocus moves into the mounted dialog", () => {
+    const opener = { isConnected: true } as HTMLElement;
+    const dialogTarget = { isConnected: true } as HTMLElement;
+    const dialog = {
+      contains: (target: HTMLElement) => target === dialogTarget
+    } as unknown as HTMLElement;
+
+    expect(getDialogRestoreFocusTarget(dialog, opener)).toBe(opener);
+    expect(getDialogRestoreFocusTarget(dialog, dialogTarget)).toBeNull();
+  });
+
+  it("uses a stable caller fallback when a transient opener unmounts", () => {
+    const transientOpener = { isConnected: false } as HTMLElement;
+    const stableFallback = { isConnected: true } as HTMLElement;
+
+    expect(getConnectedDialogRestoreTarget(transientOpener, stableFallback)).toBe(stableFallback);
+    expect(getConnectedDialogRestoreTarget(stableFallback, null)).toBe(stableFallback);
+  });
+});

tests/downloads-view.test.tsx

@@ -0,0 +1,678 @@
+import { readFileSync } from "node:fs";
+import { isValidElement, type ReactElement, type ReactNode } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import type { DownloadItem, DownloadStatus, PackageEntry } from "../src/shared/types";
+import {
+  buildDownloadSidebarCounts,
+  buildDownloadsViewModel,
+  classifyDownloadStatus,
+  type DownloadSidebarFilter,
+  type DownloadsModelInput
+} from "../src/renderer/views/downloads/downloads-model";
+import {
+  DownloadsContent,
+  DownloadsFooter,
+  DownloadsSidebar,
+  DownloadsSidebarStatus,
+  DownloadsToolbar,
+  DownloadsView,
+  type DownloadsViewActions
+} from "../src/renderer/views/downloads/DownloadsView";
+import {
+  DownloadsTableHeader,
+  PackageCardContent,
+  areItemRowPropsEqual,
+  arePackageCardPropsEqual
+} from "../src/renderer/views/downloads/DownloadsTable";
+
+const now = new Date(2026, 7, 10, 12, 0, 0, 0).getTime();
+
+function item(id: string, packageId: string, status: DownloadStatus, overrides: Partial<DownloadItem> = {}): DownloadItem {
+  return {
+    id,
+    packageId,
+    url: `https://rapidgator.net/file/${id}`,
+    provider: "realdebrid",
+    providerLabel: "Real-Debrid",
+    status,
+    retries: 0,
+    speedBps: status === "downloading" ? 12_000_000 : 0,
+    downloadedBytes: status === "completed" ? 2_000_000_000 : 500_000_000,
+    totalBytes: 2_000_000_000,
+    progressPercent: status === "completed" ? 100 : 25,
+    fileName: `${id}.mkv`,
+    targetPath: `C:\\Downloads\\${id}.mkv`,
+    resumable: true,
+    attempts: 1,
+    lastError: status === "failed" ? "Hoster nicht erreichbar" : "",
+    fullStatus: status,
+    createdAt: now - 1_000,
+    updatedAt: now,
+    ...overrides
+  };
+}
+
+function pkg(id: string, name: string, itemIds: string[]): PackageEntry {
+  return { id, name, itemIds, createdAt: now } as PackageEntry;
+}
+
+function createInput(overrides: Partial<DownloadsModelInput> = {}): DownloadsModelInput {
+  const items = [
+    item("active", "package-a", "downloading"),
+    item("queued", "package-a", "queued", { provider: "debridlink", providerLabel: "Debrid-Link" }),
+    item("failed", "package-b", "failed", { provider: "alldebrid", providerLabel: "AllDebrid" }),
+    item("done", "package-b", "completed", { provider: "realdebrid", providerLabel: "Real-Debrid" })
+  ];
+  const packages = [
+    pkg("package-a", "Aktive Serie", ["active", "queued"]),
+    pkg("package-b", "Archiv Paket", ["failed", "done"])
+  ];
+  return {
+    packageOrder: packages.map((entry) => entry.id),
+    packages: Object.fromEntries(packages.map((entry) => [entry.id, entry])),
+    items: Object.fromEntries(items.map((entry) => [entry.id, entry])),
+    displayMode: "packages",
+    filter: "all",
+    providerFilter: "all",
+    query: "",
+    collapsedPackageIds: [],
+    selectedIds: [],
+    hideExtractedItems: false,
+    showAllPackages: false,
+    renderLimit: 260,
+    ...overrides
+  };
+}
+
+function createActions(overrides: Partial<DownloadsViewActions> = {}): DownloadsViewActions {
+  return {
+    onDisplayModeChange: () => {},
+    onFilterChange: () => {},
+    onProviderFilterChange: () => {},
+    onQueryChange: () => {},
+    onAddLinks: () => {},
+    onStartDownloads: () => {},
+    onPauseDownloads: () => {},
+    onStopDownloads: () => {},
+    onToggleSchedule: () => {},
+    onScheduleTimeChange: () => {},
+    onActivateSchedule: () => {},
+    onCancelSchedule: () => {},
+    onMoveSelectionUp: () => {},
+    onMoveSelectionDown: () => {},
+    onRenameSelection: () => {},
+    onRemoveSelection: () => {},
+    onToggleClipboardWatcher: () => {},
+    onClearAll: () => {},
+    onToggleAllPackages: () => {},
+    onShowAllPackages: () => {},
+    onPackageDragStart: () => {},
+    onPackageDrop: () => {},
+    onPackageDragEnd: () => {},
+    onSetVisibleSelection: () => {},
+    onToggleSelection: () => {},
+    onSelectionMouseDown: () => {},
+    onSelectionMouseEnter: () => {},
+    onTogglePackage: () => {},
+    onTogglePackageCollapse: () => {},
+    onStartPackageRename: () => {},
+    onPackageRenameChange: () => {},
+    onCommitPackageRename: () => {},
+    onCancelPackageRename: () => {},
+    onCancelPackage: () => {},
+    onMovePackageUp: () => {},
+    onMovePackageDown: () => {},
+    onRemoveItem: () => {},
+    onOpenContextMenu: () => {},
+    onSortColumn: () => {},
+    onColumnDragStart: () => {},
+    onColumnDragOver: () => {},
+    onColumnDragLeave: () => {},
+    onColumnDrop: () => {},
+    onColumnDragEnd: () => {},
+    onColumnContextMenu: () => {},
+    ...overrides
+  };
+}
+
+function visitElements(node: ReactNode, visit: (element: ReactElement) => void): void {
+  if (Array.isArray(node)) {
+    node.forEach((child) => visitElements(child, visit));
+    return;
+  }
+  if (!isValidElement(node)) {
+    return;
+  }
+  visit(node);
+  visitElements(node.props.children, visit);
+}
+
+function findElement(node: ReactNode, predicate: (element: ReactElement) => boolean): ReactElement {
+  let result: ReactElement | null = null;
+  visitElements(node, (element) => {
+    if (!result && predicate(element)) {
+      result = element;
+    }
+  });
+  if (!result) {
+    throw new Error("Element not found");
+  }
+  return result;
+}
+
+function findButton(node: ReactNode, label: string): ReactElement {
+  return findElement(node, (element) => element.type === "button" && element.props.children === label);
+}
+
+function withRuntime(input: DownloadsModelInput, overrides: Record<string, unknown> = {}) {
+  return {
+    ...buildDownloadsViewModel(input),
+    running: true,
+    paused: false,
+    canStart: true,
+    canPause: true,
+    canStop: true,
+    actionBusy: false,
+    reconnectSeconds: 0,
+    reconnectReason: "",
+    clipboardWatcher: true,
+    scheduleActive: false,
+    scheduleOpen: false,
+    scheduleTime: "23:30",
+    scheduleLabel: "",
+    packageSpeedBps: { "package-a": 12_000_000 },
+    editingPackageId: null,
+    editingName: "",
+    columnOrder: ["name", "size", "hoster", "progress"] as const,
+    gridTemplate: "minmax(280px, 2fr) 140px 160px minmax(220px, 1fr)",
+    status: {
+      packages: 2,
+      links: 4,
+      session: "3,00 GB",
+      total: "10,00 GB",
+      hosters: 3,
+      speed: "96,00 Mbit/s",
+      eta: "00:05:00"
+    },
+    ...overrides
+  };
+}
+
+describe("downloads model", () => {
+  it("exports the sidebar filter contract used by the downloads shell", () => {
+    const filter: DownloadSidebarFilter = "queued";
+
+    expect(filter).toBe("queued");
+  });
+
+  it("builds sidebar counts without mutating the runtime items", () => {
+    const items = [
+      item("count-active", "count-package", "downloading"),
+      item("count-done", "count-package", "completed"),
+      item("count-cancelled", "count-package", "cancelled")
+    ];
+    const snapshot = items.map((entry) => ({ ...entry }));
+
+    expect(buildDownloadSidebarCounts(items)).toEqual({ all: 3, active: 1, queued: 0, paused: 0, completed: 1, failed: 0 });
+    expect(items).toEqual(snapshot);
+  });
+
+  it("maps every runtime status into the exact semantic filter class", () => {
+    expect(classifyDownloadStatus("downloading")).toBe("active");
+    expect(classifyDownloadStatus("validating")).toBe("active");
+    expect(classifyDownloadStatus("extracting")).toBe("active");
+    expect(classifyDownloadStatus("integrity_check")).toBe("active");
+    expect(classifyDownloadStatus("queued")).toBe("queued");
+    expect(classifyDownloadStatus("reconnect_wait")).toBe("queued");
+    expect(classifyDownloadStatus("paused")).toBe("paused");
+    expect(classifyDownloadStatus("completed")).toBe("completed");
+    expect(classifyDownloadStatus("failed")).toBe("failed");
+    expect(classifyDownloadStatus("cancelled")).toBe("all");
+  });
+
+  it("derives sidebar counts from the complete queue before presentation filters", () => {
+    const model = buildDownloadsViewModel(createInput({ filter: "failed" }));
+
+    expect(model.counts).toEqual({ all: 4, active: 1, queued: 1, paused: 0, completed: 1, failed: 1 });
+    expect(model.visibleItemIds).toEqual(["failed"]);
+  });
+
+  it("filters by package name, file name, provider, status and extracted visibility", () => {
+    const byPackage = buildDownloadsViewModel(createInput({ query: "aktive serie" }));
+    const byFile = buildDownloadsViewModel(createInput({ query: "done.mkv" }));
+    const byProvider = buildDownloadsViewModel(createInput({ providerFilter: "debridlink" }));
+    const hiddenExtracted = buildDownloadsViewModel(createInput({
+      items: { ...createInput().items, done: item("done", "package-b", "completed", { fullStatus: "Entpackt" }) },
+      hideExtractedItems: true
+    }));
+
+    expect(byPackage.packageRows.map((row) => row.package.id)).toEqual(["package-a"]);
+    expect(byPackage.packageRows[0].items.map((entry) => entry.id)).toEqual(["active", "queued"]);
+    expect(byFile.packageRows.map((row) => row.package.id)).toEqual(["package-b"]);
+    expect(byFile.packageRows[0].items.map((entry) => entry.id)).toEqual(["done"]);
+    expect(byProvider.visibleItemIds).toEqual(["queued"]);
+    expect(hiddenExtracted.visibleItemIds).not.toContain("done");
+  });
+
+  it("supports the genuine flat file mode without synthetic package rows", () => {
+    const model = buildDownloadsViewModel(createInput({ displayMode: "files" }));
+
+    expect(model.packageRows).toEqual([]);
+    expect(model.fileRows.map((entry) => entry.id)).toEqual(["active", "queued", "failed", "done"]);
+    expect(model.mainRowCount).toBe(4);
+  });
+
+  it("reports a filtered flat-file range from the actually rendered rows", () => {
+    const model = buildDownloadsViewModel(createInput({ displayMode: "files", filter: "failed" }));
+
+    expect(model.paginationLabel).toBe("1\u20131 von 1");
+    expect(model.totalMainRowCount).toBe(1);
+  });
+
+  it("counts cancelled downloads only in the complete all queue", () => {
+    const model = buildDownloadsViewModel(createInput({
+      packageOrder: ["cancelled-package"],
+      packages: { "cancelled-package": pkg("cancelled-package", "Abgebrochen", ["cancelled-item"]) },
+      items: { "cancelled-item": item("cancelled-item", "cancelled-package", "cancelled") }
+    }));
+
+    expect(model.counts).toEqual({ all: 1, active: 0, queued: 0, paused: 0, completed: 0, failed: 0 });
+    expect(buildDownloadsViewModel({ ...createInput(), filter: "completed", packageOrder: model.packageRows.map((row) => row.package.id), packages: { "cancelled-package": pkg("cancelled-package", "Abgebrochen", ["cancelled-item"]) }, items: { "cancelled-item": item("cancelled-item", "cancelled-package", "cancelled") } }).visibleItemIds).toEqual([]);
+  });
+
+  it("finds an account label without treating it as a provider id", () => {
+    const base = createInput();
+    const model = buildDownloadsViewModel({
+      ...base,
+      items: {
+        ...base.items,
+        active: { ...base.items.active, providerAccountLabel: "Privates Real-Debrid Konto" }
+      },
+      query: "privates real-debrid"
+    });
+
+    expect(model.visibleItemIds).toEqual(["active"]);
+    expect(model.providerFilter).toBe("all");
+  });
+
+  it("excludes collapsed children from visible and actionable row selection", () => {
+    const model = buildDownloadsViewModel(createInput({
+      collapsedPackageIds: ["package-a"],
+      selectedIds: ["package-a", "active", "queued"]
+    }));
+
+    expect(model.visibleRowIds).not.toContain("active");
+    expect(model.actionableSelectedIds).toEqual(["package-a"]);
+  });
+
+  it("limits occupied package rows honestly while preserving active packages and an actionable visible selection", () => {
+    const packageEntries = Array.from({ length: 264 }, (_, index) => pkg(`p-${index}`, `Paket ${index}`, [`i-${index}`]));
+    const itemEntries = packageEntries.map((entry, index) => item(`i-${index}`, entry.id, index === 263 ? "downloading" : "queued"));
+    const model = buildDownloadsViewModel(createInput({
+      packageOrder: packageEntries.map((entry) => entry.id),
+      packages: Object.fromEntries(packageEntries.map((entry) => [entry.id, entry])),
+      items: Object.fromEntries(itemEntries.map((entry) => [entry.id, entry])),
+      selectedIds: ["p-0", "i-0", "p-263", "i-263", "missing"],
+      renderLimit: 260
+    }));
+
+    expect(model.packageRows).toHaveLength(260);
+    expect(model.packageRows.some((row) => row.package.id === "p-263")).toBe(true);
+    expect(model.paginationLabel).toBe("1–260 von 264");
+    expect(model.actionableSelectedIds).toEqual(["p-0", "i-0", "p-263", "i-263"]);
+  });
+});
+
+describe("downloads view", () => {
+  it("renders the five dense markers exactly once and the empty marker only for a true empty queue", () => {
+    const occupied = renderToStaticMarkup(<DownloadsView actions={createActions()} model={withRuntime(createInput())} />);
+    const empty = renderToStaticMarkup(<DownloadsView actions={createActions()} model={withRuntime(createInput({ packageOrder: [], packages: {}, items: {} }), { running: false })} />);
+
+    for (const marker of ["downloads-sidebar", "downloads-sidebar-status", "downloads-toolbar", "downloads-table-body", "downloads-pagination"]) {
+      expect(occupied.match(new RegExp(`data-visual-region=\\"${marker}\\"`, "g"))).toHaveLength(1);
+      expect(empty.match(new RegExp(`data-visual-region=\\"${marker}\\"`, "g"))).toHaveLength(1);
+    }
+    expect(occupied).not.toContain("data-visual-region=\"downloads-empty-state\"");
+    expect(empty).toContain("data-visual-region=\"downloads-empty-state\"");
+    expect(empty).toContain("F\u00fcge Links hinzu, um den ersten Download zu starten.");
+  });
+
+  it("renders the distinct filtered-empty guidance inside the table body", () => {
+    const html = renderToStaticMarkup(<DownloadsView actions={createActions()} model={withRuntime(createInput({ filter: "paused" }))} />);
+
+    expect(html).toContain("Keine passenden Downloads");
+    expect(html).toContain("Passe Filter oder Suche an.");
+    expect(html).not.toContain("data-visual-region=\"downloads-empty-state\"");
+    expect(html).toContain("0 von 0");
+  });
+
+  it("keeps sidebar, status, toolbar, table and footer as independently renderable production modules", () => {
+    const model = withRuntime(createInput());
+    const actions = createActions();
+
+    expect(renderToStaticMarkup(<DownloadsSidebar actions={actions} model={model} />)).toContain("downloads-sidebar");
+    expect(renderToStaticMarkup(<DownloadsSidebarStatus model={model} />)).toContain("downloads-sidebar-status");
+    expect(renderToStaticMarkup(<DownloadsToolbar actions={actions} model={model} />)).toContain("downloads-toolbar");
+    expect(renderToStaticMarkup(<DownloadsContent actions={actions} model={model} />)).toContain("downloads-table-body");
+    expect(renderToStaticMarkup(<DownloadsFooter actions={actions} model={model} />)).toContain("downloads-pagination");
+  });
+
+  it("keeps the compact download search in the sidebar instead of the action toolbar", () => {
+    const model = withRuntime(createInput());
+    const actions = createActions();
+    const sidebar = renderToStaticMarkup(<DownloadsSidebar actions={actions} model={model} />);
+    const toolbar = renderToStaticMarkup(<DownloadsToolbar actions={actions} model={model} />);
+
+    expect(sidebar).toContain("downloads-sidebar-search");
+    expect(sidebar).toContain("Paket, Datei oder Service");
+    expect(toolbar).not.toContain("downloads-search-input");
+  });
+
+  it("forwards package drag lifecycle callbacks through the extracted downloads content", () => {
+    const calls: string[] = [];
+    const actions = createActions() as DownloadsViewActions & {
+      onPackageDragStart: (packageId: string) => void;
+      onPackageDrop: (packageId: string) => void;
+      onPackageDragEnd: () => void;
+    };
+    actions.onPackageDragStart = (packageId) => calls.push(`start:${packageId}`);
+    actions.onPackageDrop = (packageId) => calls.push(`drop:${packageId}`);
+    actions.onPackageDragEnd = () => calls.push("end");
+    const content = DownloadsContent({ actions, model: withRuntime(createInput()) });
+    const packageElement = findElement(content, (element) => element.props.row?.package.id === "package-a");
+
+    packageElement.props.onDragStart("package-a");
+    packageElement.props.onDrop("package-b");
+    packageElement.props.onDragEnd();
+
+    expect(calls).toEqual(["start:package-a", "drop:package-b", "end"]);
+  });
+
+  it("dispatches add, start, pause, stop, scheduling and selection actions through separate existing callbacks", () => {
+    const calls: string[] = [];
+    const actions = createActions({
+      onAddLinks: () => calls.push("add"),
+      onStartDownloads: () => calls.push("start"),
+      onPauseDownloads: () => calls.push("pause"),
+      onStopDownloads: () => calls.push("stop"),
+      onActivateSchedule: () => calls.push("schedule"),
+      onMoveSelectionUp: () => calls.push("up"),
+      onMoveSelectionDown: () => calls.push("down"),
+      onRenameSelection: () => calls.push("rename"),
+      onRemoveSelection: () => calls.push("remove")
+    });
+    const toolbar = DownloadsToolbar({
+      actions,
+      model: withRuntime(createInput({ selectedIds: ["active"] }), { scheduleOpen: true })
+    });
+
+    for (const label of ["Links hinzufügen", "Start", "Pause", "Stop", "Planen", "Nach oben", "Nach unten", "Umbenennen", "Entfernen"]) {
+      findButton(toolbar, label).props.onClick();
+    }
+
+    expect(calls).toEqual(["add", "start", "pause", "stop", "schedule", "up", "down", "rename", "remove"]);
+  });
+
+  it("uses exact toolbar disabled semantics without a dead reconnect branch", () => {
+    const toolbar = DownloadsToolbar({
+      actions: createActions(),
+      model: withRuntime(createInput(), { canStart: false, canPause: false, canStop: false, reconnectSeconds: 8 })
+    });
+
+    expect(findButton(toolbar, "Start").props.disabled).toBe(true);
+    expect(findButton(toolbar, "Pause").props.disabled).toBe(true);
+    expect(findButton(toolbar, "Stop").props.disabled).toBe(true);
+    expect(renderToStaticMarkup(toolbar)).not.toContain("Reconnect");
+  });
+
+  it("keeps start available for resume and pause independent from unrelated action busy state", () => {
+    const pausedToolbar = DownloadsToolbar({
+      actions: createActions(),
+      model: withRuntime(createInput(), { paused: true, canStart: false, canPause: true })
+    });
+    const busyToolbar = DownloadsToolbar({
+      actions: createActions(),
+      model: withRuntime(createInput(), { paused: false, canPause: true, actionBusy: true })
+    });
+
+    expect(findButton(pausedToolbar, "Start").props.disabled).toBe(false);
+    expect(findButton(pausedToolbar, "Pause").props.disabled).toBe(true);
+    expect(findButton(busyToolbar, "Pause").props.disabled).toBe(false);
+  });
+
+  it("enables package movement only for a visible selected package row", () => {
+    const itemOnly = DownloadsToolbar({
+      actions: createActions(),
+      model: withRuntime(createInput({ selectedIds: ["active"] }))
+    });
+    const packageSelected = DownloadsToolbar({
+      actions: createActions(),
+      model: withRuntime(createInput({ selectedIds: ["package-a"] }))
+    });
+
+    expect(findButton(itemOnly, "Nach oben").props.disabled).toBe(true);
+    expect(findButton(itemOnly, "Nach unten").props.disabled).toBe(true);
+    expect(findButton(packageSelected, "Nach oben").props.disabled).toBe(false);
+    expect(findButton(packageSelected, "Nach unten").props.disabled).toBe(false);
+  });
+
+  it("keeps an active schedule visible and cancellable while the picker is closed", () => {
+    const toolbar = DownloadsToolbar({
+      actions: createActions(),
+      model: withRuntime(createInput(), { scheduleActive: true, scheduleOpen: false, scheduleLabel: "1m 30s" })
+    });
+    const html = renderToStaticMarkup(toolbar);
+
+    expect(html).toContain("Geplant: 1m 30s");
+    expect(findButton(toolbar, "Abbrechen").props.disabled).toBe(false);
+  });
+
+  it("keeps the table header and all rows in one horizontal scroll context with exact dense geometry", () => {
+    const html = renderToStaticMarkup(<DownloadsView actions={createActions()} model={withRuntime(createInput())} />);
+    const css = readFileSync(new URL("../src/renderer/views/downloads/downloads.css", import.meta.url), "utf8");
+
+    expect(html.indexOf("downloads-table-header")).toBeGreaterThan(html.indexOf("downloads-table"));
+    expect(html.indexOf("data-visual-region=\"downloads-table-body\"")).toBeGreaterThan(html.indexOf("downloads-table-header"));
+    expect(css).toMatch(/\.downloads-table\s*\{[^}]*overflow-x:\s*auto;/s);
+    expect(css).toMatch(/\.downloads-table-header\s*\{[^}]*height:\s*41px;[^}]*position:\s*sticky;/s);
+    expect(css).toMatch(/\.downloads-item-row,\s*\.downloads-package-row\s*\{[^}]*height:\s*48px;/s);
+    expect(css).toMatch(/\.downloads-toolbar button,\s*\.downloads-footer button,[^{]+\{[^}]*height:\s*36px;/s);
+    expect(css).toMatch(/\.downloads-content\s*\{[^}]*height:\s*100%;/s);
+    expect(css).toMatch(/\.downloads-action-cell button,\s*\.downloads-collapse-button\s*\{[^}]*width:\s*30px;[^}]*height:\s*30px;/s);
+    expect(css).toMatch(/\.downloads-footer\s*\{[^}]*height:\s*60px;[^}]*padding:\s*0 12px 0 60px;/s);
+    expect(css).toMatch(/\.downloads-package-card\s*\{[^}]*border:\s*0;[^}]*border-bottom:\s*1px solid var\(--ui-border\);[^}]*padding:\s*0;/s);
+    expect(css).not.toMatch(/gradient|box-shadow|nth-child/i);
+  });
+
+  it("keeps visible interaction text non-selectable and only inputs plus copy values selectable", () => {
+    const css = readFileSync(new URL("../src/renderer/views/downloads/downloads.css", import.meta.url), "utf8");
+
+    expect(css).toMatch(/\.downloads-sidebar,\s*\.downloads-sidebar-status,\s*\.downloads-toolbar,\s*\.downloads-content,\s*\.downloads-footer\s*\{[^}]*user-select:\s*none;/s);
+    expect(css).toMatch(/\.downloads-copyable,\s*\.downloads-search-input,\s*\.downloads-rename-input\s*\{[^}]*user-select:\s*text;/s);
+  });
+
+  it("keeps the 1120px layout inside the single downloads table scroll owner", () => {
+    const css = readFileSync(new URL("../src/renderer/views/downloads/downloads.css", import.meta.url), "utf8");
+
+    expect(css).toMatch(/@media \(max-width:\s*1120px\)/);
+    expect(css).toMatch(/\.downloads-content\s*\{[^}]*overflow:\s*hidden;/s);
+    expect(css).toMatch(/\.downloads-table\s*\{[^}]*overflow-x:\s*auto;[^}]*overflow-y:\s*auto;/s);
+  });
+
+  it("uses only semantic color variables declared by the shared theme", () => {
+    const css = readFileSync(new URL("../src/renderer/views/downloads/downloads.css", import.meta.url), "utf8");
+    const theme = readFileSync(new URL("../src/renderer/theme.css", import.meta.url), "utf8");
+    const usedVariables = [...css.matchAll(/var\((--ui-[a-z-]+)/g)].map((match) => match[1]);
+    const declaredVariables = new Set([...theme.matchAll(/(--ui-[a-z-]+)\s*:/g)].map((match) => match[1]));
+
+    expect([...new Set(usedVariables)].filter((name) => !declaredVariables.has(name))).toEqual([]);
+  });
+});
+
+describe("downloads App integration", () => {
+  it("uses the extracted table only, cleans temporary drag listeners and routes the global context start through the shared callback", () => {
+    const source = readFileSync(new URL("../src/renderer/App.tsx", import.meta.url), "utf8").replaceAll("\r\n", "\n");
+
+    expect(source).not.toMatch(/^const ItemRow\b|^const PackageCard\b|^interface ItemRowProps\b|^interface PackageCardProps\b/m);
+    expect(source).toContain('window.removeEventListener("mouseup", dragMouseUpRef.current)');
+    expect(source).toContain("downloadsActions.onStartDownloads(); setContextMenu(null);");
+    expect(source).not.toContain(") : false ? (");
+    expect(source).not.toContain("{false && (");
+  });
+});
+
+describe("download table row contracts", () => {
+  it("preserves the package download and extraction phase split", () => {
+    const extractionPackage = {
+      ...pkg("extracting-package", "Entpackendes Paket", ["extracting-item"]),
+      status: "extracting"
+    } as PackageEntry;
+    const extractionItem = item("extracting-item", extractionPackage.id, "completed", {
+      fullStatus: "Entpacken 40%",
+      progressPercent: 100
+    });
+    const html = renderToStaticMarkup(PackageCardContent({
+      actions: createActions(),
+      columnOrder: ["progress"],
+      editing: false,
+      editingName: "",
+      gridTemplate: "80px",
+      packageSpeedBps: 0,
+      row: { package: extractionPackage, items: [extractionItem], collapsed: true },
+      selectedIds: new Set<string>(),
+      selectedVersion: 0
+    }));
+
+    expect(html).toContain("<b>70%</b>");
+  });
+
+  it("sets the whole visible selection atomically from the header checkbox", () => {
+    const calls: unknown[] = [];
+    const header = DownloadsTableHeader({
+      actions: createActions({ onSetVisibleSelection: (ids, selected) => calls.push([ids, selected]) }),
+      columnOrder: ["name"],
+      gridTemplate: "minmax(280px, 1fr)",
+      selectedCount: 1,
+      sortColumn: "name",
+      sortDirection: "asc",
+      visibleIds: ["package-a", "active", "queued"]
+    });
+    const checkbox = findElement(header, (element) => element.type === "input");
+
+    checkbox.props.onChange({ target: { checked: true } });
+
+    expect(calls).toEqual([[['package-a', 'active', 'queued'], true]]);
+  });
+
+  it("includes package selection state in memo equality", () => {
+    const model = withRuntime(createInput());
+    const row = model.packageRows[0];
+    const base = {
+      actions: createActions(),
+      columnOrder: model.columnOrder,
+      editing: false,
+      editingName: "",
+      gridTemplate: model.gridTemplate,
+      packageSpeedBps: 0,
+      row,
+      selectedIds: new Set<string>(),
+      selectedVersion: 1
+    };
+
+    expect(arePackageCardPropsEqual(base, { ...base, selectedIds: new Set([row.package.id]), selectedVersion: 2 })).toBe(false);
+  });
+
+  it("invalidates visible item rows when provider, error or timestamp presentation changes", () => {
+    const model = withRuntime(createInput());
+    const base = {
+      actions: createActions(),
+      columnOrder: model.columnOrder,
+      gridTemplate: model.gridTemplate,
+      item: model.packageRows[0].items[0],
+      selected: false
+    };
+
+    expect(areItemRowPropsEqual(base, { ...base, item: { ...base.item, providerLabel: "Debrid-Link" } })).toBe(false);
+    expect(areItemRowPropsEqual(base, { ...base, item: { ...base.item, lastError: "Neuer Fehler" } })).toBe(false);
+    expect(areItemRowPropsEqual(base, { ...base, item: { ...base.item, updatedAt: base.item.updatedAt + 1 } })).toBe(false);
+  });
+
+  it("does not collapse a package on shift selection", () => {
+    const calls: string[] = [];
+    const model = withRuntime(createInput());
+    const row = model.packageRows[0];
+    const component = PackageCardContent({
+      actions: createActions({
+        onToggleSelection: () => calls.push("select"),
+        onTogglePackageCollapse: () => calls.push("collapse")
+      }),
+      columnOrder: model.columnOrder,
+      editing: false,
+      editingName: "",
+      gridTemplate: model.gridTemplate,
+      packageSpeedBps: 0,
+      row,
+      selectedIds: new Set<string>(),
+      selectedVersion: 1
+    });
+    const packageRow = findElement(component, (element) => element.props["data-download-row-id"] === row.package.id);
+
+    packageRow.props.onClick({ button: 0, ctrlKey: false, metaKey: false, shiftKey: true, target: {}, currentTarget: { contains: () => true } });
+
+    expect(calls).toEqual(["select"]);
+  });
+
+  it("commits Enter and the resulting Blur rename sequence exactly once", () => {
+    const commits: string[] = [];
+    const model = withRuntime(createInput());
+    const row = model.packageRows[0];
+    const component = PackageCardContent({
+      actions: createActions({ onCommitPackageRename: (id, value) => commits.push(`${id}:${value}`) }),
+      columnOrder: model.columnOrder,
+      editing: true,
+      editingName: "Neuer Name",
+      gridTemplate: model.gridTemplate,
+      packageSpeedBps: 0,
+      row,
+      selectedIds: new Set<string>(),
+      selectedVersion: 1
+    });
+    const input = findElement(component, (element) => element.type === "input" && element.props.className === "downloads-rename-input");
+
+    input.props.onKeyDown({ key: "Enter", preventDefault: () => {}, currentTarget: { blur: () => {} } });
+    input.props.onBlur();
+
+    expect(commits).toEqual(["package-a:Neuer Name"]);
+  });
+
+  it("keeps package selection and activation as separate controls and sends context coordinates", () => {
+    const calls: Array<unknown> = [];
+    const model = withRuntime(createInput());
+    const row = model.packageRows[0];
+    const component = PackageCardContent({
+      actions: createActions({
+        onToggleSelection: (id) => calls.push(["select", id]),
+        onTogglePackage: (id) => calls.push(["toggle", id]),
+        onOpenContextMenu: (id, x, y) => calls.push(["context", id, x, y])
+      }),
+      columnOrder: model.columnOrder,
+      editing: false,
+      editingName: "",
+      gridTemplate: model.gridTemplate,
+      packageSpeedBps: 0,
+      row,
+      selectedIds: new Set<string>(),
+      selectedVersion: 1
+    });
+    const selection = findElement(component, (element) => element.type === "input" && element.props["aria-label"] === "Aktive Serie auswählen");
+    const activation = findElement(component, (element) => element.type === "input" && element.props["aria-label"] === "Aktive Serie aktivieren");
+    const packageElement = findElement(component, (element) => element.props["data-download-package-id"] === "package-a");
+
+    selection.props.onChange();
+    activation.props.onChange();
+    packageElement.props.onContextMenu({ preventDefault: () => {}, stopPropagation: () => {}, clientX: 30, clientY: 50 });
+
+    expect(calls).toEqual([["select", "package-a"], ["toggle", "package-a"], ["context", "package-a", 30, 50]]);
+  });
+});

tests/history-reveal.test.ts

@@ -0,0 +1,142 @@
+import { win32 } from "node:path";
+import { describe, expect, it, vi } from "vitest";
+import type { HistoryEntry } from "../src/shared/types";
+import {
+  revealHistoryEntry,
+  type HistoryRevealDependencies
+} from "../src/main/history-reveal";
+
+function historyEntry(overrides: Partial<HistoryEntry> = {}): HistoryEntry {
+  return {
+    id: "known-id",
+    name: "Paket",
+    totalBytes: 1,
+    downloadedBytes: 1,
+    fileCount: 1,
+    provider: "realdebrid",
+    completedAt: 1,
+    durationSeconds: 1,
+    status: "completed",
+    outputDir: "C:\\Downloads\\Paket",
+    urls: [],
+    ...overrides
+  };
+}
+
+function dependencies(overrides: Partial<HistoryRevealDependencies> = {}): HistoryRevealDependencies {
+  return {
+    loadHistory: () => [historyEntry()],
+    stat: vi.fn(async () => ({ isDirectory: () => true })),
+    openPath: vi.fn(async () => ""),
+    ...overrides
+  };
+}
+
+describe("revealHistoryEntry", () => {
+  it.each(["", " ", " padded", "padded ", "x".repeat(257)])("rejects malformed entry id %j before loading history", async (entryId) => {
+    const loadHistory = vi.fn(() => [historyEntry()]);
+    const deps = dependencies({ loadHistory });
+
+    await expect(revealHistoryEntry({ entryId }, deps)).resolves.toEqual({ ok: false, reason: "entry-not-found" });
+    expect(loadHistory).not.toHaveBeenCalled();
+    expect(deps.stat).not.toHaveBeenCalled();
+    expect(deps.openPath).not.toHaveBeenCalled();
+  });
+
+  it("resolves a known case-sensitive id to the authoritative directory and opens it exactly once", async () => {
+    const deps = dependencies();
+
+    await expect(revealHistoryEntry({ entryId: "known-id" }, deps)).resolves.toEqual({ ok: true });
+    expect(deps.stat).toHaveBeenCalledTimes(1);
+    expect(deps.stat).toHaveBeenCalledWith("C:\\Downloads\\Paket");
+    expect(deps.openPath).toHaveBeenCalledTimes(1);
+    expect(deps.openPath).toHaveBeenCalledWith("C:\\Downloads\\Paket");
+  });
+
+  it("ignores every renderer-supplied field except entryId", async () => {
+    const deps = dependencies();
+
+    await expect(revealHistoryEntry({ entryId: "known-id", outputDir: "C:\\Angriff" } as never, deps)).resolves.toEqual({ ok: true });
+    expect(deps.openPath).toHaveBeenCalledWith("C:\\Downloads\\Paket");
+  });
+
+  it("rejects unknown and differently cased ids before path inspection", async () => {
+    const deps = dependencies();
+
+    await expect(revealHistoryEntry({ entryId: "KNOWN-ID" }, deps)).resolves.toEqual({ ok: false, reason: "entry-not-found" });
+    expect(deps.stat).not.toHaveBeenCalled();
+    expect(deps.openPath).not.toHaveBeenCalled();
+  });
+
+  it.each([
+    "relative\\folder",
+    "C:relative\\folder",
+    "\\current-drive-rooted",
+    "/current-drive-rooted",
+    "\\\\server",
+    "\\\\server\\",
+    "\\\\..\\share\\folder",
+    "\\\\server\\.\\folder",
+    "\\\\server\\..\\folder",
+    "\\\\.\\C:\\folder",
+    "\\\\?\\C:\\folder",
+    "\\\\?\\GLOBALROOT\\Device\\HarddiskVolumeShadowCopy1",
+    "C:\\folder:stream",
+    "\\\\server\\share\\folder:stream",
+    "C:\\folder\0bad",
+    "C:\\folder\nbad",
+    "C:\\bad?name"
+  ])("rejects unsafe or non-absolute Windows path %s", async (outputDir) => {
+    const deps = dependencies({ loadHistory: () => [historyEntry({ outputDir })] });
+
+    await expect(revealHistoryEntry({ entryId: "known-id" }, deps)).resolves.toEqual({ ok: false, reason: "invalid-output-dir" });
+    expect(deps.stat).not.toHaveBeenCalled();
+    expect(deps.openPath).not.toHaveBeenCalled();
+  });
+
+  it.each([
+    ["C:/Media/Folder//Child", win32.normalize("C:/Media/Folder//Child")],
+    ["\\\\server\\share\\Folder\\Child\\", win32.normalize("\\\\server\\share\\Folder\\Child\\")]
+  ])("normalizes valid drive and UNC paths before stat and openPath", async (outputDir, normalized) => {
+    const deps = dependencies({ loadHistory: () => [historyEntry({ outputDir })] });
+
+    await expect(revealHistoryEntry({ entryId: "known-id" }, deps)).resolves.toEqual({ ok: true });
+    expect(deps.stat).toHaveBeenCalledWith(normalized);
+    expect(deps.openPath).toHaveBeenCalledWith(normalized);
+  });
+
+  it("maps a missing directory and a file target without calling openPath", async () => {
+    const missing = dependencies({ stat: vi.fn(async () => { throw Object.assign(new Error("missing"), { code: "ENOENT" }); }) });
+    const file = dependencies({ stat: vi.fn(async () => ({ isDirectory: () => false })) });
+
+    await expect(revealHistoryEntry({ entryId: "known-id" }, missing)).resolves.toEqual({ ok: false, reason: "output-dir-missing" });
+    await expect(revealHistoryEntry({ entryId: "known-id" }, file)).resolves.toEqual({ ok: false, reason: "output-dir-not-directory" });
+    expect(missing.openPath).not.toHaveBeenCalled();
+    expect(file.openPath).not.toHaveBeenCalled();
+  });
+
+  it.each([
+    Object.assign(new Error("denied"), { code: "EACCES" }),
+    new Error("network unavailable")
+  ])("maps non-missing stat failures to open-failed without calling openPath", async (error) => {
+    const deps = dependencies({ stat: vi.fn(async () => { throw error; }) });
+
+    await expect(revealHistoryEntry({ entryId: "known-id" }, deps)).resolves.toEqual({ ok: false, reason: "open-failed" });
+    expect(deps.openPath).not.toHaveBeenCalled();
+  });
+
+  it("accepts followed junction or symlink stats when the resolved target is a directory", async () => {
+    const deps = dependencies({ stat: vi.fn(async () => ({ isDirectory: () => true, isSymbolicLink: () => true })) });
+
+    await expect(revealHistoryEntry({ entryId: "known-id" }, deps)).resolves.toEqual({ ok: true });
+    expect(deps.openPath).toHaveBeenCalledTimes(1);
+  });
+
+  it("treats a non-empty shell result and a rejected shell promise as open failures", async () => {
+    const returnedError = dependencies({ openPath: vi.fn(async () => "Zugriff verweigert") });
+    const rejected = dependencies({ openPath: vi.fn(async () => { throw new Error("shell failed"); }) });
+
+    await expect(revealHistoryEntry({ entryId: "known-id" }, returnedError)).resolves.toEqual({ ok: false, reason: "open-failed" });
+    await expect(revealHistoryEntry({ entryId: "known-id" }, rejected)).resolves.toEqual({ ok: false, reason: "open-failed" });
+  });
+});

tests/history-view.test.tsx

@@ -0,0 +1,429 @@
+import { readFileSync } from "node:fs";
+import { isValidElement, type ReactElement, type ReactNode } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import type { HistoryEntry } from "../src/shared/types";
+import {
+  buildHistoryViewModel,
+  deriveHistoryHoster,
+  deriveHistoryStartAt,
+  filterHistoryRows,
+  pruneHistoryIds,
+  selectVisibleHistoryIds,
+  type HistoryFilter,
+  type HistoryViewEntry
+} from "../src/renderer/views/history/history-model";
+import {
+  HistoryContent,
+  HistoryToolbar,
+  HistoryView,
+  type HistoryViewActions
+} from "../src/renderer/views/history/HistoryView";
+import { createVisualFixture } from "./visual/fixtures";
+import { createVisualElectronApi } from "./visual/mock-electron-api";
+
+function visitElements(node: ReactNode, visit: (element: ReactElement) => void): void {
+  if (Array.isArray(node)) {
+    node.forEach((child) => visitElements(child, visit));
+    return;
+  }
+  if (!isValidElement(node)) {
+    return;
+  }
+  visit(node);
+  visitElements(node.props.children, visit);
+}
+
+function findElement(node: ReactNode, predicate: (element: ReactElement) => boolean): ReactElement {
+  let result: ReactElement | null = null;
+  visitElements(node, (element) => {
+    if (!result && predicate(element)) {
+      result = element;
+    }
+  });
+  if (!result) {
+    throw new Error("Element not found");
+  }
+  return result;
+}
+
+function findButton(node: ReactNode, label: string): ReactElement {
+  return findElement(node, (element) => element.type === "button" && element.props.children === label);
+}
+
+function createActions(overrides: Partial<HistoryViewActions> = {}): HistoryViewActions {
+  return {
+    onFilterChange: () => {},
+    onQueryChange: () => {},
+    onToggleSelection: () => {},
+    onToggleSelectAll: () => {},
+    onToggleExpansion: () => {},
+    onRestore: () => {},
+    onReveal: () => {},
+    onRemove: () => {},
+    onClearSelection: () => {},
+    onClearHistory: () => {},
+    onContextMenu: () => {},
+    ...overrides
+  };
+}
+
+const now = new Date(2026, 7, 10, 12, 0, 0, 0).getTime();
+const todayStart = new Date(2026, 7, 10, 0, 0, 0, 0).getTime();
+const weekStart = new Date(2026, 7, 4, 0, 0, 0, 0).getTime();
+
+function entry(overrides: Partial<HistoryViewEntry> & Pick<HistoryViewEntry, "id" | "name">): HistoryViewEntry {
+  return {
+    totalBytes: 2_000_000_000,
+    downloadedBytes: 1_500_000_000,
+    fileCount: 2,
+    provider: "realdebrid",
+    completedAt: todayStart + 60_000,
+    durationSeconds: 60,
+    status: "completed",
+    outputDir: `C:\\Downloads\\${overrides.name}`,
+    urls: ["https://rapidgator.net/file/test"],
+    ...overrides,
+    id: overrides.id,
+    name: overrides.name
+  };
+}
+
+const entries: HistoryViewEntry[] = [
+  entry({ id: "today", name: "Heute Paket", completedAt: todayStart + 1 }),
+  entry({ id: "week-edge", name: "Wochenanfang", completedAt: weekStart }),
+  entry({ id: "week", name: "Wochen Paket", completedAt: todayStart - 1, status: "deleted", provider: "debridlink", urls: ["https://ddownload.com/a"] }),
+  entry({ id: "older", name: "Altes Paket", completedAt: weekStart - 1, status: "failed", provider: null, outputDir: "D:\\Archiv\\Alt", urls: ["https://sub.example.test/a"] })
+];
+
+describe("history model", () => {
+  it("separates today, previous six calendar days, older and status filters at exact boundaries", () => {
+    const expected: Record<HistoryFilter, string[]> = {
+      all: ["today", "week-edge", "week", "older"],
+      today: ["today"],
+      week: ["week-edge", "week"],
+      older: ["older"],
+      completed: ["today", "week-edge"],
+      deleted: ["week"],
+      failed: ["older"]
+    };
+
+    for (const [filter, ids] of Object.entries(expected) as Array<[HistoryFilter, string[]]>) {
+      expect(filterHistoryRows(entries, filter, "", now).map((row) => row.id)).toEqual(ids);
+    }
+  });
+
+  it("uses local calendar midnights for the six previous days across both daylight-saving transitions", () => {
+    const springNow = new Date(2026, 2, 30, 12, 0, 0, 0).getTime();
+    const springBoundary = new Date(2026, 2, 24, 0, 0, 0, 0).getTime();
+    const autumnNow = new Date(2026, 9, 26, 12, 0, 0, 0).getTime();
+    const autumnBoundary = new Date(2026, 9, 20, 0, 0, 0, 0).getTime();
+
+    expect(filterHistoryRows([
+      entry({ id: "spring-before", name: "Spring before", completedAt: springBoundary - 30 * 60 * 1000 }),
+      entry({ id: "spring-boundary", name: "Spring boundary", completedAt: springBoundary })
+    ], "week", "", springNow).map((row) => row.id)).toEqual(["spring-boundary"]);
+    expect(filterHistoryRows([
+      entry({ id: "autumn-boundary", name: "Autumn boundary", completedAt: autumnBoundary + 30 * 60 * 1000 })
+    ], "week", "", autumnNow).map((row) => row.id)).toEqual(["autumn-boundary"]);
+  });
+
+  it("bounds today to the exact local calendar day and excludes future timestamps", () => {
+    const tomorrowStart = new Date(2026, 7, 11, 0, 0, 0, 0).getTime();
+    const temporalEntries = [
+      entry({ id: "today-last", name: "Today last", completedAt: tomorrowStart - 1 }),
+      entry({ id: "tomorrow", name: "Tomorrow", completedAt: tomorrowStart }),
+      entry({ id: "future", name: "Future", completedAt: tomorrowStart + 86_400_000 })
+    ];
+
+    expect(filterHistoryRows(temporalEntries, "today", "", now).map((row) => row.id)).toEqual(["today-last"]);
+  });
+
+  it("searches name, path, hoster, provider and URLs without changing newest-first input order", () => {
+    const searchable = [
+      entry({ id: "new", name: "Neu", completedAt: now, provider: "debridlink", outputDir: "C:\\Filme\\Staffel", urls: ["https://rapidgator.net/file/needle"] }),
+      entry({ id: "old", name: "Älter", completedAt: now - 1, provider: "realdebrid", outputDir: "D:\\Archiv", urls: ["https://ddownload.com/archive"] })
+    ];
+
+    expect(filterHistoryRows(searchable, "all", "neu", now).map((row) => row.id)).toEqual(["new"]);
+    expect(filterHistoryRows(searchable, "all", "staffel", now).map((row) => row.id)).toEqual(["new"]);
+    expect(filterHistoryRows(searchable, "all", "rapidgator.net", now).map((row) => row.id)).toEqual(["new"]);
+    expect(filterHistoryRows(searchable, "all", "Debrid-Link", now).map((row) => row.id)).toEqual(["new"]);
+    expect(filterHistoryRows(searchable, "all", "needle", now).map((row) => row.id)).toEqual(["new"]);
+    expect(filterHistoryRows(searchable, "all", "d", now).map((row) => row.id)).toEqual(["new", "old"]);
+  });
+
+  it("derives hosters only from valid URL hostnames and clamps the calculated start time", () => {
+    expect(deriveHistoryHoster(["https://rapidgator.net/a", "https://rapidgator.net/b", "https://ddownload.com/c", "not a url"])).toBe("rapidgator.net, ddownload.com");
+    expect(deriveHistoryHoster([])).toBe("—");
+    expect(deriveHistoryHoster(undefined)).toBe("—");
+    expect(deriveHistoryStartAt(entry({ id: "start", name: "Start", completedAt: 20_000, durationSeconds: 3 }))).toBe(17_000);
+    expect(deriveHistoryStartAt(entry({ id: "clamped", name: "Clamp", completedAt: 2_000, durationSeconds: 3 }))).toBe(0);
+
+    const row = filterHistoryRows([entry({ id: "provider", name: "Provider", provider: "realdebrid", urls: [] })], "all", "", now)[0];
+    expect(row.hoster).toBe("—");
+    expect(row.providerLabel).toBe("Real-Debrid");
+  });
+
+  it("prunes removed ids and preserves the original set instance when every id survives", () => {
+    const stable = new Set(["today", "week"]);
+    expect(pruneHistoryIds(stable, ["today", "week", "older"])).toBe(stable);
+
+    const pruned = pruneHistoryIds(new Set(["today", "removed"]), ["today", "week"]);
+    expect([...pruned]).toEqual(["today"]);
+  });
+
+  it("builds Ctrl+A selection from only the currently visible filtered row ids", () => {
+    const visibleIds = filterHistoryRows(entries, "week", "Wochen", now).map((row) => row.id);
+    expect([...selectVisibleHistoryIds(visibleIds)]).toEqual(["week-edge", "week"]);
+  });
+
+  it("removes hidden selected ids from the filtered view model and every toolbar action", () => {
+    const model = buildHistoryViewModel(entries, "deleted", "", ["today", "week"], [], false, "", now);
+    const calls: Array<unknown> = [];
+    const toolbar = HistoryToolbar({
+      model,
+      actions: createActions({
+        onRestore: (ids) => calls.push(["restore", ids]),
+        onReveal: (id) => calls.push(["reveal", id]),
+        onRemove: (ids) => calls.push(["remove", ids])
+      })
+    });
+
+    expect(model.rows.map((row) => row.id)).toEqual(["week"]);
+    expect(model.selectedIds).toEqual(["week"]);
+    findButton(toolbar, "Erneut hinzufügen").props.onClick();
+    findButton(toolbar, "Im Ordner zeigen").props.onClick();
+    findButton(toolbar, "Entfernen").props.onClick();
+    expect(calls).toEqual([
+      ["restore", ["week"]],
+      ["reveal", "week"],
+      ["remove", ["week"]]
+    ]);
+  });
+});
+
+describe("HistoryView", () => {
+  it("keeps the header and rows inside the same internal horizontal scroll context", () => {
+    const html = renderToStaticMarkup(
+      <HistoryView
+        actions={createActions()}
+        model={buildHistoryViewModel(entries.slice(0, 2), "all", "", [], [], false, "", now)}
+      />
+    );
+    const css = readFileSync(new URL("../src/renderer/views/history/history.css", import.meta.url), "utf8");
+    const tableStart = html.indexOf("history-table");
+    const headerStart = html.indexOf("history-table-header");
+    const bodyStart = html.indexOf("data-visual-region=\"history-table-body\"");
+
+    expect(tableStart).toBeGreaterThan(-1);
+    expect(headerStart).toBeGreaterThan(tableStart);
+    expect(bodyStart).toBeGreaterThan(headerStart);
+    expect(css).toMatch(/\.history-content \.history-table\s*\{[^}]*overflow:\s*auto;/s);
+    expect(css).toMatch(/\.history-table > \.history-table-header\s*\{[^}]*position:\s*sticky;[^}]*top:\s*0;/s);
+    expect(css).toMatch(/\.history-table > \.history-table-body\s*\{[^}]*overflow:\s*visible;/s);
+    expect(css).not.toMatch(/\.history-table > \.history-table-body\s*\{[^}]*overflow:\s*auto;/s);
+  });
+
+  it("keeps every real AppShell history surface non-selectable while allowing text selection only for detail values", () => {
+    const css = readFileSync(new URL("../src/renderer/views/history/history.css", import.meta.url), "utf8");
+
+    expect(css).toMatch(/\.history-sidebar,\s*\.history-workspace-toolbar,\s*\.history-content,\s*\.history-pagination\s*\{[^}]*user-select:\s*none;/s);
+    expect(css).toMatch(/\.history-copyable\s*\{[^}]*user-select:\s*text;/s);
+    expect(css).toMatch(/\.history-workspace-toolbar \.ui-toolbar-search-input\s*\{[^}]*user-select:\s*text;/s);
+    expect(css).not.toMatch(/(^|\n)\.history-toolbar(?:\s|,|\{)/);
+    expect(css).not.toMatch(/(^|\n)\.history-detail-grid(?:\s|>|\.|\{)/);
+  });
+
+  it("keeps loading, empty, filtered-empty and error states inside the same table body", () => {
+    const states = [
+      [buildHistoryViewModel([], "all", "", [], [], true, "", now), "Verlauf wird geladen"],
+      [buildHistoryViewModel([], "all", "", [], [], false, "", now), "Noch kein Verlauf"],
+      [buildHistoryViewModel([entry({ id: "done", name: "Fertig" })], "failed", "", [], [], false, "", now), "Keine passenden Einträge"],
+      [buildHistoryViewModel([], "all", "", [], [], false, "Verlauf konnte nicht geladen werden", now), "Verlauf konnte nicht geladen werden"]
+    ] as const;
+
+    for (const [model, label] of states) {
+      const html = renderToStaticMarkup(<HistoryView actions={createActions()} model={model} />);
+      expect(html.indexOf(label)).toBeGreaterThan(html.indexOf("data-visual-region=\"history-table-body\""));
+      expect(html).toContain("data-visual-region=\"history-pagination\"");
+      expect(html).toContain("0 von 0");
+    }
+  });
+
+  it("renders the exact compact headers, semantic statuses and no operative download controls", () => {
+    const html = renderToStaticMarkup(
+      <HistoryView
+        actions={createActions()}
+        model={buildHistoryViewModel(entries, "all", "", [], [], false, "", now)}
+      />
+    );
+    const headerStart = html.indexOf("history-table-header-row");
+    const headerEnd = html.indexOf("data-visual-region=\"history-table-body\"");
+    const headerMarkup = html.slice(headerStart, headerEnd);
+    const headers = ["Paket / Datei", "Status", "Größe", "Hoster", "Gestartet", "Beendet", "Aktion"];
+    let previous = -1;
+    for (const header of headers) {
+      const index = headerMarkup.indexOf(`>${header}<`);
+      expect(index).toBeGreaterThan(previous);
+      previous = index;
+    }
+    expect(html).toContain("history-status-completed");
+    expect(html).toContain("history-status-deleted");
+    expect(html).toContain("history-status-failed");
+    expect(html).toContain("Abgeschlossen");
+    expect(html).toContain("Gelöscht");
+    expect(html).toContain("Fehlgeschlagen");
+    expect(html).not.toMatch(/>Start<|>Pause<|>Stop<|Priorität/);
+  });
+
+  it("renders each visual marker once, occupied main rows separately from closed detail rows and an honest footer", () => {
+    const html = renderToStaticMarkup(
+      <HistoryView
+        actions={createActions()}
+        model={buildHistoryViewModel(entries.slice(0, 2), "all", "", [], [], false, "", now)}
+      />
+    );
+
+    for (const marker of ["history-sidebar", "history-toolbar", "history-table-body", "history-pagination"]) {
+      expect(html.match(new RegExp(`data-visual-region=\\"${marker}\\"`, "g"))).toHaveLength(1);
+    }
+    expect(html.match(/data-history-row-id=/g)).toHaveLength(2);
+    expect(html).not.toContain("history-detail-row");
+    expect(html).toContain("1–2 von 2");
+  });
+
+  it("dispatches selection, expansion, select-all and context coordinates with exact visible ids", () => {
+    const calls: Array<unknown> = [];
+    const actions = createActions({
+      onToggleSelection: (id) => calls.push(["select", id]),
+      onToggleSelectAll: (ids) => calls.push(["all", ids]),
+      onToggleExpansion: (id) => calls.push(["expand", id]),
+      onContextMenu: (id, x, y) => calls.push(["context", id, x, y])
+    });
+    const model = buildHistoryViewModel(entries.slice(0, 2), "all", "", [], [], false, "", now);
+    const content = HistoryContent({ actions, model });
+
+    const selectAll = findElement(content, (element) => element.type === "input" && element.props["aria-label"] === "Alle sichtbaren Einträge auswählen");
+    selectAll.props.onChange();
+    const rowCheckbox = findElement(content, (element) => element.type === "input" && element.props["aria-label"] === "Heute Paket auswählen");
+    rowCheckbox.props.onChange();
+    findElement(content, (element) => element.type === "button" && element.props["aria-label"] === "Details anzeigen").props.onClick({ stopPropagation: () => {} });
+    const row = findElement(content, (element) => element.props["data-history-row-id"] === "today");
+    row.props.onContextMenu({
+      preventDefault: () => {},
+      stopPropagation: () => {},
+      clientX: 144,
+      clientY: 288,
+      currentTarget: { querySelector: () => null }
+    });
+
+    expect(calls).toEqual([
+      ["all", ["today", "week-edge"]],
+      ["select", "today"],
+      ["expand", "today"],
+      ["context", "today", 144, 288]
+    ]);
+  });
+
+  it("focuses the matching row action before opening a genuine row context menu", () => {
+    const calls: Array<unknown> = [];
+    const focusCalls: Array<unknown> = [];
+    const content = HistoryContent({
+      actions: createActions({ onContextMenu: (id, x, y) => calls.push([id, x, y]) }),
+      model: buildHistoryViewModel(entries.slice(0, 1), "all", "", [], [], false, "", now)
+    });
+    const row = findElement(content, (element) => element.props["data-history-row-id"] === "today");
+
+    row.props.onContextMenu({
+      preventDefault: () => {},
+      stopPropagation: () => {},
+      clientX: 21,
+      clientY: 34,
+      currentTarget: {
+        querySelector: () => ({ focus: (options: unknown) => focusCalls.push(options) })
+      }
+    });
+
+    expect(focusCalls).toEqual([{ preventScroll: true }]);
+    expect(calls).toEqual([["today", 21, 34]]);
+  });
+
+  it("enables reveal only for exactly one selected row and sends selection actions as ids", () => {
+    const selected = buildHistoryViewModel(entries, "all", "", ["today"], [], false, "", now);
+    const multiple = buildHistoryViewModel(entries, "all", "", ["today", "week"], [], false, "", now);
+    const calls: Array<unknown> = [];
+    const actions = createActions({
+      onRestore: (ids) => calls.push(["restore", ids]),
+      onReveal: (id) => calls.push(["reveal", id]),
+      onRemove: (ids) => calls.push(["remove", ids]),
+      onClearSelection: () => calls.push(["clear"])
+    });
+    const singleToolbar = HistoryToolbar({ actions, model: selected });
+    const multiToolbar = HistoryToolbar({ actions, model: multiple });
+
+    expect(findButton(singleToolbar, "Im Ordner zeigen").props.disabled).toBe(false);
+    expect(findButton(multiToolbar, "Im Ordner zeigen").props.disabled).toBe(true);
+    findButton(singleToolbar, "Erneut hinzufügen").props.onClick();
+    findButton(singleToolbar, "Im Ordner zeigen").props.onClick();
+    findButton(singleToolbar, "Entfernen").props.onClick();
+    findButton(singleToolbar, "Auswahl löschen").props.onClick();
+
+    expect(calls).toEqual([
+      ["restore", ["today"]],
+      ["reveal", "today"],
+      ["remove", ["today"]],
+      ["clear"]
+    ]);
+  });
+
+  it("renders expanded paths and URLs as copyable details without changing the 48px main-row contract", () => {
+    const html = renderToStaticMarkup(
+      <HistoryView
+        actions={createActions()}
+        model={buildHistoryViewModel(entries.slice(0, 1), "all", "", [], ["today"], false, "", now)}
+      />
+    );
+
+    expect(html).toContain("history-detail-row");
+    expect(html).toContain("history-copyable");
+    expect(html).toContain("C:\\Downloads\\Heute Paket");
+    expect(html).toContain("https://rapidgator.net/file/test");
+  });
+});
+
+describe("visual history states", () => {
+  it("re-arms the real App mounted gate before every StrictMode lifecycle setup can start async work", () => {
+    const source = readFileSync(new URL("../src/renderer/App.tsx", import.meta.url), "utf8").replaceAll("\r\n", "\n");
+    const firstRequest = source.indexOf("window.rd.getVersion()");
+    const effectStart = source.lastIndexOf("useEffect(() => {", firstRequest);
+    const cleanup = source.indexOf("mountedRef.current = false", firstRequest);
+    const setup = source.indexOf("mountedRef.current = true", effectStart);
+
+    expect(effectStart).toBeGreaterThan(-1);
+    expect(setup).toBeGreaterThan(effectStart);
+    expect(setup).toBeLessThan(firstRequest);
+    expect(cleanup).toBeGreaterThan(firstRequest);
+  });
+
+  it("keeps bootstrap deterministic before exposing loading and error responses to the opened history view", async () => {
+    const loadingApi = createVisualElectronApi(createVisualFixture("dense"), "?history-state=loading");
+    await expect(loadingApi.getHistory()).resolves.toHaveLength(2);
+    const pending = loadingApi.getHistory();
+    let settled = false;
+    void pending.finally(() => { settled = true; });
+    await Promise.resolve();
+    await Promise.resolve();
+    expect(settled).toBe(false);
+
+    const errorApi = createVisualElectronApi(createVisualFixture("dense"), "?history-state=error");
+    await expect(errorApi.getHistory()).resolves.toHaveLength(2);
+    await expect(errorApi.getHistory()).rejects.toThrow("Visual history load failed");
+  });
+});
+
+const productionEntry: HistoryEntry = {
+  ...entry({ id: "production", name: "Produktiv" }),
+  status: "completed"
+};
+void productionEntry;

tests/overlay-host.test.tsx

@@ -0,0 +1,87 @@
+import { readFileSync } from "node:fs";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import { OverlayHost } from "../src/renderer/shell/OverlayHost";
+import { UpdateExperience } from "../src/renderer/shell/UpdateExperience";
+
+describe("OverlayHost", () => {
+  it("renders every desktop overlay slot exactly once", () => {
+    const slots = {
+      confirm: <span>confirm-slot</span>,
+      onlineBackup: <span>backup-slot</span>,
+      diagnostics: <span>diagnostics-slot</span>,
+      deleteConfirmation: <span>delete-slot</span>,
+      conflict: <span>conflict-slot</span>,
+      accountCreate: <span>account-create-slot</span>,
+      accountEdit: <span>account-edit-slot</span>,
+      keyStats: <span>key-stats-slot</span>,
+      linkPopup: <span>link-popup-slot</span>,
+      update: <span>update-slot</span>,
+      toast: <span>toast-slot</span>,
+      accountContextMenu: <span>account-menu-slot</span>,
+      downloadContextMenu: <span>download-menu-slot</span>,
+      columnContextMenu: <span>column-menu-slot</span>,
+      historyContextMenu: <span>history-menu-slot</span>,
+      dropOverlay: <span>drop-slot</span>
+    };
+    const html = renderToStaticMarkup(<OverlayHost {...slots} />);
+
+    expect(html).toContain("id=\"md-overlay-host\"");
+    for (const value of Object.values(slots)) {
+      const label = String(value.props.children);
+      expect(html.split(label)).toHaveLength(2);
+    }
+  });
+
+  it("does not render placeholders for empty slots", () => {
+    const html = renderToStaticMarkup(<OverlayHost toast={<span>sichtbar</span>} />);
+
+    expect(html).toContain("sichtbar");
+    expect(html).not.toContain("data-overlay-slot");
+  });
+
+  it("hosts the update surface through the shared dialog without duplicating the trigger", () => {
+    const html = renderToStaticMarkup(
+      <OverlayHost
+        update={(
+          <UpdateExperience
+            available
+            currentVersion="v2.0.12"
+            latestTag="v9.9.9"
+            onClose={() => {}}
+            onInstall={() => {}}
+            onLater={() => {}}
+            onOpen={() => {}}
+            open
+            progress={0}
+            releaseNotes="Changes"
+            renderTrigger={false}
+            state="prompt"
+          />
+        )}
+      />
+    );
+
+    expect(html).toContain("md-dialog-size-update");
+    expect(html).not.toContain("aria-label=\"Update verfügbar\"");
+    expect(html.match(/role=\"dialog\"/g)).toHaveLength(1);
+  });
+
+  it("defines a stacking-context-safe menu, tooltip, toast and modal layer order", () => {
+    const css = readFileSync(new URL("../src/renderer/shell/shell.css", import.meta.url), "utf8");
+
+    expect(css).toMatch(/--md-layer-menu:\s*600/);
+    expect(css).toMatch(/--md-layer-tooltip:\s*700/);
+    expect(css).toMatch(/--md-layer-toast:\s*800/);
+    expect(css).toMatch(/--md-layer-modal:\s*1000/);
+    expect(css).toMatch(/\.md-context-menu\s*\{[^}]*z-index:\s*var\(--md-layer-menu\)/s);
+    expect(css).toMatch(/\.md-update-tooltip\s*\{[^}]*z-index:\s*var\(--md-layer-tooltip\)/s);
+    expect(css).toMatch(/\.md-toast\s*\{[^}]*z-index:\s*var\(--md-layer-toast\)/s);
+    expect(css).toMatch(/\.md-dialog-backdrop\s*\{[^}]*z-index:\s*var\(--md-layer-modal\)/s);
+    expect(css).toMatch(/\.md-drop-overlay\s*\{[^}]*pointer-events:\s*none/s);
+    expect(css).toMatch(/\.md-overlay-host \.md-dialog-backdrop\s*\{[^}]*z-index:\s*var\(--md-layer-modal\)/s);
+    expect(css).toMatch(/\.md-overlay-host \.md-context-menu\s*\{[^}]*z-index:\s*var\(--md-layer-menu\)/s);
+    expect(css).toMatch(/\.md-overlay-host \.md-toast\s*\{[^}]*z-index:\s*var\(--md-layer-toast\)/s);
+    expect(css).toMatch(/\.md-overlay-host \.md-dialog\s*\{[^}]*background:\s*var\(--ui-surface\)/s);
+  });
+});

tests/responsive-ui.test.tsx

@@ -0,0 +1,175 @@
+import { readFileSync } from "node:fs";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import { ErrorBoundary } from "../src/renderer/error-boundary";
+import { AppShell } from "../src/renderer/shell/AppShell";
+import * as focusModule from "../src/renderer/ui/focus";
+import * as shellModel from "../src/renderer/shell/shell-model";
+
+describe("responsive shell mode", () => {
+  it("selects full, compact and minimum modes at every boundary", () => {
+    const getResponsiveShellMode = (shellModel as unknown as {
+      getResponsiveShellMode?: (width: number) => "full" | "compact" | "minimum";
+    }).getResponsiveShellMode;
+
+    expect(getResponsiveShellMode).toBeTypeOf("function");
+    expect([
+      getResponsiveShellMode!(2560),
+      getResponsiveShellMode!(1920),
+      getResponsiveShellMode!(1367),
+      getResponsiveShellMode!(1366),
+      getResponsiveShellMode!(1121),
+      getResponsiveShellMode!(1120)
+    ]).toEqual(["full", "full", "full", "compact", "compact", "minimum"]);
+  });
+
+  it("wires the derived mode into stable shell markup and responsive CSS", () => {
+    const html = renderToStaticMarkup(
+      <AppShell
+        activeView="downloads"
+        contextInfo={null}
+        footer={null}
+        headerActions={null}
+        onSidebarCollapsedChange={() => {}}
+        onViewChange={() => {}}
+        sidebar={<div>Filter</div>}
+        sidebarCollapsed={false}
+        sidebarStatus={null}
+        toolbar={null}
+      >
+        <div>Downloads</div>
+      </AppShell>
+    );
+    const css = readFileSync(new URL("../src/renderer/shell/shell.css", import.meta.url), "utf8");
+
+    expect(html).toContain('data-responsive-mode="full"');
+    expect(html).toContain("md-shell is-full");
+    expect(css).toContain(".md-shell.is-compact");
+    expect(css).toContain(".md-shell.is-minimum");
+    expect(css).toMatch(/grid-template-columns:\s*56px minmax\(0,\s*1fr\)/);
+  });
+
+  it("keeps responsive rail content hidden behind a visible expand control", () => {
+    const shellSource = readFileSync(new URL("../src/renderer/shell/AppShell.tsx", import.meta.url), "utf8");
+    const sidebarSource = readFileSync(new URL("../src/renderer/shell/AppSidebar.tsx", import.meta.url), "utf8");
+    const css = readFileSync(new URL("../src/renderer/shell/shell.css", import.meta.url), "utf8");
+
+    expect(shellSource).toContain("responsiveRail={responsiveSidebarCollapsed}");
+    expect(sidebarSource).toContain('is-responsive-rail');
+    expect(css).toMatch(/\.md-shell-sidebar\.is-responsive-rail \.md-shell-sidebar-toggle\s*\{[^}]*width:\s*32px;[^}]*height:\s*32px;[^}]*opacity:\s*1;/s);
+    expect(css).not.toMatch(/\.md-shell-sidebar\.is-responsive-rail \.md-shell-sidebar-scroll\s*\{[^}]*visibility:\s*visible;/s);
+  });
+});
+
+describe("focus restoration", () => {
+  it("restores the preferred connected target after the closing render", () => {
+    const restoreFocus = (focusModule as unknown as {
+      restoreFocus?: (
+        preferredTarget: HTMLElement | null,
+        fallbackTarget: HTMLElement | null,
+        schedule: (callback: () => void) => void
+      ) => void;
+    }).restoreFocus;
+    let scheduled: (() => void) | null = null;
+    let preferredFocusCount = 0;
+    let fallbackFocusCount = 0;
+    const preferredTarget = {
+      isConnected: true,
+      focus: () => {
+        preferredFocusCount += 1;
+      }
+    } as HTMLElement;
+    const fallbackTarget = {
+      isConnected: true,
+      focus: () => {
+        fallbackFocusCount += 1;
+      }
+    } as HTMLElement;
+
+    expect(restoreFocus).toBeTypeOf("function");
+    restoreFocus!(preferredTarget, fallbackTarget, (callback) => {
+      scheduled = callback;
+    });
+
+    expect(preferredFocusCount).toBe(0);
+    expect(fallbackFocusCount).toBe(0);
+    (scheduled as (() => void) | null)?.();
+    expect(preferredFocusCount).toBe(1);
+    expect(fallbackFocusCount).toBe(0);
+  });
+
+  it("uses only a connected fallback when the preferred target was removed", () => {
+    const restoreFocus = (focusModule as unknown as {
+      restoreFocus?: (
+        preferredTarget: HTMLElement | null,
+        fallbackTarget: HTMLElement | null,
+        schedule: (callback: () => void) => void
+      ) => void;
+    }).restoreFocus;
+    let scheduled: (() => void) | null = null;
+    let preferredConnected = true;
+    let preferredFocusCount = 0;
+    let fallbackFocusCount = 0;
+    const preferredTarget = {
+      get isConnected() {
+        return preferredConnected;
+      },
+      focus: () => {
+        preferredFocusCount += 1;
+      }
+    } as HTMLElement;
+    const fallbackTarget = {
+      isConnected: true,
+      focus: () => {
+        fallbackFocusCount += 1;
+      }
+    } as HTMLElement;
+
+    restoreFocus!(preferredTarget, fallbackTarget, (callback) => {
+      scheduled = callback;
+    });
+    preferredConnected = false;
+    (scheduled as (() => void) | null)?.();
+
+    expect(preferredFocusCount).toBe(0);
+    expect(fallbackFocusCount).toBe(1);
+
+    restoreFocus!(null, { ...fallbackTarget, isConnected: false } as HTMLElement, (callback) => callback());
+    expect(fallbackFocusCount).toBe(1);
+  });
+
+  it("is consumed by dialogs, context menus and the avatar menu", () => {
+    const consumers = [
+      ["../src/renderer/ui/Dialog.tsx", 'from "./focus"'],
+      ["../src/renderer/ui/ContextMenu.tsx", 'from "./focus"'],
+      ["../src/renderer/shell/AvatarMenu.tsx", 'from "../ui/focus"']
+    ] as const;
+
+    for (const [path, importPath] of consumers) {
+      const source = readFileSync(new URL(path, import.meta.url), "utf8");
+      expect(source).toContain("restoreFocus");
+      expect(source).toContain(importPath);
+      expect(source).toMatch(/restoreFocus\(/);
+    }
+  });
+});
+
+describe("renderer error boundary", () => {
+  it("renders a tokenized accessible recovery surface", () => {
+    const boundary = new ErrorBoundary({ children: "content" });
+    boundary.state = { hasError: true, message: "Render failure" };
+
+    const html = renderToStaticMarkup(boundary.render());
+
+    expect(html).toContain('class="ui-error-boundary"');
+    expect(html).toContain('role="alert"');
+    expect(html).toContain('aria-labelledby="renderer-error-title"');
+    expect(html).toContain('aria-describedby="renderer-error-description renderer-error-details"');
+    expect(html).toContain('id="renderer-error-title"');
+    expect(html).toContain('id="renderer-error-description"');
+    expect(html).toContain('id="renderer-error-details"');
+    expect(html).toContain("Render failure");
+    expect(html).toContain("Oberfläche neu laden");
+    expect(html).not.toContain("style=");
+  });
+});

tests/settings-view.test.tsx

@@ -0,0 +1,632 @@
+import { readFileSync } from "node:fs";
+import { isValidElement, type ReactElement, type ReactNode } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import { defaultSettings } from "../src/main/constants";
+import {
+  applyAccountEdit,
+  createAccountEditState,
+  type AccountEditTarget
+} from "../src/renderer/account-edit";
+import {
+  buildBulkAccountEnabledState,
+  buildConfiguredProviderOrder
+} from "../src/renderer/account-ui";
+import { getDebridLinkApiKeyId } from "../src/shared/debrid-link-keys";
+import { getMegaDebridAccountId } from "../src/shared/mega-debrid-accounts";
+import {
+  ACCOUNT_COLUMNS,
+  SETTINGS_SECTIONS,
+  buildAccountRowId,
+  buildTargetedAccountCheck,
+  filterAccountAddOptions,
+  getSettingsSaveLabel,
+  projectAccountRows,
+  pruneAccountSelection,
+  reconcileAccountAddDraft,
+  sortAccountRows,
+  type AccountAddOption,
+  type AccountRowSource,
+  type SettingsFormViewModel
+} from "../src/renderer/views/settings/settings-model";
+import {
+  AccountAddDialog,
+  AccountEditDialog,
+  AccountWorkspace,
+  type AccountWorkspaceActions,
+  type AccountWorkspaceViewModel
+} from "../src/renderer/views/settings/AccountWorkspace";
+import { SettingsForm } from "../src/renderer/views/settings/SettingsForm";
+import {
+  SettingsContent,
+  SettingsSidebar,
+  SettingsView,
+  type SettingsViewActions,
+  type SettingsViewModel
+} from "../src/renderer/views/settings/SettingsView";
+
+const GIB = 1024 * 1024 * 1024;
+const NOW = 1_700_000_000_000;
+const appSource = readFileSync(new URL("../src/renderer/App.tsx", import.meta.url), "utf8");
+const accountWorkspaceSource = readFileSync(
+  new URL("../src/renderer/views/settings/AccountWorkspace.tsx", import.meta.url),
+  "utf8"
+);
+
+function sourceBlock(source: string, start: string, end: string): string {
+  return source.slice(source.indexOf(start), source.indexOf(end, source.indexOf(start)));
+}
+
+function visitElements(node: ReactNode, visit: (element: ReactElement) => void): void {
+  if (Array.isArray(node)) {
+    node.forEach((child) => visitElements(child, visit));
+    return;
+  }
+  if (!isValidElement(node)) {
+    return;
+  }
+  visit(node);
+  visitElements(node.props.children, visit);
+  visitElements(node.props.actions, visit);
+}
+
+function findElement(node: ReactNode, predicate: (element: ReactElement) => boolean): ReactElement {
+  let result: ReactElement | null = null;
+  visitElements(node, (element) => {
+    if (!result && predicate(element)) {
+      result = element;
+    }
+  });
+  if (!result) {
+    throw new Error("Element not found");
+  }
+  return result;
+}
+
+function count(haystack: string, needle: string): number {
+  return haystack.split(needle).length - 1;
+}
+
+function accountSources(): AccountRowSource[] {
+  return [
+    {
+      identityId: "mega-premium",
+      service: "megadebrid-api",
+      hoster: "Mega-Debrid",
+      mode: "API",
+      icon: "./provider-icons/mega-debrid.png",
+      enabled: true,
+      status: {
+        state: "premium",
+        message: "Premium aktiv",
+        premiumUntilMs: NOW + 7 * 24 * 60 * 60 * 1000,
+        email: "verified@example.test"
+      },
+      dailyLimitBytes: 10 * GIB,
+      dailyUsageBytes: 4 * GIB,
+      username: "stored@example.test",
+      credentialKind: "password",
+      canCheck: true
+    },
+    {
+      identityId: "debrid-free",
+      service: "debridlink",
+      hoster: "Debrid-Link",
+      mode: "API-Key",
+      icon: "./provider-icons/debrid-link.ico",
+      enabled: true,
+      status: { state: "free", message: "Free Account", premiumUntilMs: null },
+      dailyLimitBytes: 0,
+      dailyUsageBytes: 0,
+      username: "free-user",
+      credentialKind: "api-key",
+      canCheck: true
+    },
+    {
+      identityId: "invalid",
+      service: "ddownload",
+      hoster: "DDownload",
+      mode: "Login",
+      icon: "./provider-icons/ddownload.ico",
+      enabled: true,
+      status: { state: "invalid", message: "Login abgelehnt", premiumUntilMs: null },
+      username: "invalid@example.test",
+      credentialKind: "password",
+      canCheck: false
+    },
+    {
+      identityId: "unknown",
+      service: "onefichier",
+      hoster: "1Fichier",
+      mode: "API",
+      icon: "./provider-icons/onefichier.png",
+      enabled: true,
+      status: { state: "unchecked", message: "", premiumUntilMs: null },
+      username: "—",
+      credentialKind: "api-key",
+      canCheck: false
+    },
+    {
+      identityId: "disabled",
+      service: "linksnappy",
+      hoster: "LinkSnappy",
+      mode: "Web-Login",
+      icon: "./provider-icons/linksnappy.png",
+      enabled: false,
+      status: { state: "disabled", message: "", premiumUntilMs: null },
+      username: "disabled@example.test",
+      credentialKind: "password",
+      canCheck: false
+    }
+  ];
+}
+
+function accountOptions(): AccountAddOption[] {
+  return [
+    {
+      id: "realdebrid-api",
+      service: "realdebrid",
+      title: "Real-Debrid",
+      mode: "API",
+      description: "API-Token verwenden",
+      functionLabel: "API-Token",
+      filter: "api",
+      multi: false
+    },
+    {
+      id: "ddownload-login",
+      service: "ddownload",
+      title: "DDownload",
+      mode: "Login",
+      description: "Login und Passwort",
+      functionLabel: "Login:Passwort",
+      filter: "web",
+      multi: false
+    },
+    {
+      id: "megadebrid-api",
+      service: "megadebrid-api",
+      title: "Mega-Debrid",
+      mode: "API",
+      description: "Weiteren Account hinzufügen",
+      functionLabel: "Login:Passwort",
+      filter: "api",
+      multi: true
+    },
+    {
+      id: "debridlink-api",
+      service: "debridlink",
+      title: "Debrid-Link",
+      mode: "API",
+      description: "Weiteren API-Key hinzufügen",
+      functionLabel: "API-Key",
+      filter: "api",
+      multi: true
+    }
+  ];
+}
+
+function formModel(): SettingsFormViewModel {
+  return {
+    title: "Allgemein",
+    description: "Grundeinstellungen der Anwendung.",
+    groups: [
+      {
+        id: "appearance",
+        title: "Darstellung",
+        fields: [
+          {
+            id: "downloadDir",
+            kind: "path",
+            label: "Download-Ordner",
+            value: "C:\\Downloads",
+            help: "Zielordner für Downloads."
+          },
+          {
+            id: "theme",
+            kind: "theme",
+            label: "Theme",
+            value: "dark",
+            options: [
+              { value: "light", label: "Light" },
+              { value: "dark", label: "Dark" },
+              { value: "system", label: "System" }
+            ]
+          },
+          {
+            id: "autoUpdate",
+            kind: "switch",
+            label: "Automatisch nach Updates suchen",
+            value: true
+          }
+        ]
+      }
+    ]
+  };
+}
+
+function workspaceModel(): AccountWorkspaceViewModel {
+  return {
+    activePanel: "overview",
+    rows: projectAccountRows(accountSources(), [buildAccountRowId("megadebrid-api", "API", "mega-premium")], NOW),
+    selectedIds: [buildAccountRowId("megadebrid-api", "API", "mega-premium")],
+    busy: false,
+    rules: {
+      providerOrder: ["Debrid-Link", "Real-Debrid"],
+      routing: ["rapidgator.net → Debrid-Link"],
+      autoFallback: true
+    }
+  };
+}
+
+function workspaceActions(overrides: Partial<AccountWorkspaceActions> = {}): AccountWorkspaceActions {
+  return {
+    onPanelChange: () => {},
+    onSelect: () => {},
+    onToggleEnabled: () => {},
+    onEdit: () => {},
+    onContextMenu: () => {},
+    onAdd: () => {},
+    onRemoveSelected: () => {},
+    onCheckAll: () => {},
+    ...overrides
+  };
+}
+
+function viewModel(saveState: SettingsViewModel["saveState"] = "clean"): SettingsViewModel {
+  return {
+    section: "accounts",
+    saveState,
+    form: formModel(),
+    accounts: workspaceModel()
+  };
+}
+
+function viewActions(): SettingsViewActions {
+  return {
+    onSectionChange: () => {},
+    onSave: () => {},
+    form: { onChange: () => {}, onAction: () => {} },
+    accounts: workspaceActions()
+  };
+}
+
+describe("settings model", () => {
+  it("keeps six stable sections and accessible save-state labels", () => {
+    expect(SETTINGS_SECTIONS).toEqual([
+      { id: "allgemein", label: "Allgemein" },
+      { id: "accounts", label: "Accounts" },
+      { id: "extract", label: "Entpacken" },
+      { id: "speed", label: "Geschwindigkeit" },
+      { id: "cleanup", label: "Bereinigung" },
+      { id: "updates", label: "Updates" }
+    ]);
+    expect(["clean", "dirty", "saving", "saved", "error"].map((state) => getSettingsSaveLabel(state as never)))
+      .toEqual(["Gespeichert", "Ungespeicherte Änderungen", "Wird gespeichert…", "Gespeichert", "Speichern fehlgeschlagen"]);
+  });
+
+  it("projects stable sanitized rows with full verified usernames and distinct states", () => {
+    const rows = projectAccountRows(accountSources(), [], NOW);
+
+    expect(rows.map((row) => row.id)).toEqual(accountSources().map((source) => buildAccountRowId(source.service, source.mode, source.identityId)));
+    expect(rows[0].username).toBe("verified@example.test");
+    expect(rows[0].credential).toBe("••••••");
+    expect(rows[1].credential).toBe("API-Key");
+    expect(rows.map((row) => row.status.tone)).toEqual(["ok", "free", "invalid", "unknown", "disabled"]);
+    expect(rows.map((row) => row.status.text)).toEqual([
+      "Premium aktiv",
+      "Free Account",
+      "Login abgelehnt",
+      "Noch nicht geprüft",
+      "Deaktiviert"
+    ]);
+    expect(JSON.stringify(rows)).not.toContain("test-password");
+    expect(JSON.stringify(rows)).not.toContain("test-token");
+  });
+
+  it("sorts positive premium expirations first and prunes vanished selections", () => {
+    const rows = projectAccountRows(accountSources(), [], NOW);
+    const sorted = sortAccountRows(rows);
+
+    expect(sorted[0].status.tone).toBe("ok");
+    expect(pruneAccountSelection([rows[0].id, "missing"], rows)).toEqual([rows[0].id]);
+  });
+
+  it("filters add options honestly and clears hidden credentials", () => {
+    const options = accountOptions();
+    expect(filterAccountAddOptions(options, "", "web", []) .map((option) => option.id)).toEqual(["ddownload-login"]);
+    expect(filterAccountAddOptions(options, "api-key", "all", ["realdebrid"]).map((option) => option.id)).toEqual(["debridlink-api"]);
+    expect(filterAccountAddOptions(options, "", "all", ["realdebrid"]).map((option) => option.id)).not.toContain("realdebrid-api");
+    expect(filterAccountAddOptions(options, "", "all", ["realdebrid"]).map((option) => option.id)).toContain("megadebrid-api");
+
+    expect(reconcileAccountAddDraft({
+      selectedId: "realdebrid-api",
+      login: "member@example.test",
+      password: "test-password",
+      token: "test-token",
+      dailyLimitGb: "10"
+    }, [options[1]])).toEqual({ selectedId: null, login: "", password: "", token: "", dailyLimitGb: "" });
+  });
+
+  it("targets new Mega and Debrid-Link identities without inventing checks for other services", () => {
+    const options = accountOptions();
+    expect(buildTargetedAccountCheck(options[2], "mda-new")).toEqual({ service: "megadebrid-api", expectedStatusId: "mda-new" });
+    expect(buildTargetedAccountCheck(options[3], "dlk-new")).toEqual({ service: "debridlink", expectedStatusId: "dlk-new" });
+    expect(buildTargetedAccountCheck(options[1], "ddownload-new")).toBeNull();
+  });
+
+  it("preserves provider order and deduplicates bulk account identities", () => {
+    expect(buildConfiguredProviderOrder(
+      ["debridlink", "realdebrid", "alldebrid"],
+      ["realdebrid", "alldebrid", "debridlink", "bestdebrid"]
+    )).toEqual(["debridlink", "realdebrid", "alldebrid", "bestdebrid"]);
+    expect(buildBulkAccountEnabledState(
+      ["alldebrid"],
+      ["megadebrid-api", "alldebrid"],
+      ["mega-1", "mega-1"],
+      ["dl-1", "dl-1"],
+      false
+    )).toEqual({
+      disabledProviders: ["alldebrid", "megadebrid-api"],
+      megaDebridDisabledAccountIds: ["mega-1"],
+      debridLinkDisabledKeyIds: ["dl-1"]
+    });
+  });
+
+  it("keeps exact rounded limits and migrates edited identity metadata", () => {
+    const login = "member@example.test";
+    const oldId = getMegaDebridAccountId(login);
+    const newLogin = "renamed@example.test";
+    const newId = getMegaDebridAccountId(newLogin);
+    const exactLimit = Math.floor(10.05 * GIB);
+    const settings = {
+      ...defaultSettings(),
+      megaCredentials: `${login}:test-password`,
+      megaLogin: login,
+      megaPassword: "test-password",
+      megaDebridDisabledAccountIds: [oldId],
+      megaDebridAccountDailyLimitBytes: { [oldId]: exactLimit },
+      megaDebridAccountDailyUsageBytes: { [oldId]: 2 * GIB },
+      megaDebridAccountTotalUsageBytes: { [oldId]: 20 * GIB }
+    };
+    const target: AccountEditTarget = {
+      type: "mega",
+      rowKey: "row",
+      kind: "megadebrid-api",
+      service: "megadebrid-api",
+      accountId: oldId
+    };
+    const unchanged = applyAccountEdit(settings, createAccountEditState(target, settings));
+    const renamed = applyAccountEdit(settings, {
+      ...createAccountEditState(target, settings),
+      login: newLogin
+    });
+
+    expect(unchanged.megaDebridAccountDailyLimitBytes[oldId]).toBe(exactLimit);
+    expect(renamed.megaDebridDisabledAccountIds).toEqual([newId]);
+    expect(renamed.megaDebridAccountDailyLimitBytes[newId]).toBe(exactLimit);
+    expect(renamed.megaDebridAccountDailyUsageBytes[newId]).toBeUndefined();
+    expect(renamed.megaDebridAccountTotalUsageBytes[newId]).toBeUndefined();
+  });
+});
+
+describe("settings views", () => {
+  it("renders one real sidebar marker and all sections", () => {
+    const html = renderToStaticMarkup(<SettingsSidebar actions={viewActions()} model={viewModel()} />);
+    expect(count(html, "data-visual-region=\"settings-sidebar\"")).toBe(1);
+    for (const section of SETTINGS_SECTIONS) {
+      expect(html).toContain(section.label);
+    }
+    expect(html).toContain("aria-current=\"page\"");
+  });
+
+  it("shows every save state without a generic toolbar, pagination or info control", () => {
+    for (const saveState of ["clean", "dirty", "saving", "saved", "error"] as const) {
+      const html = renderToStaticMarkup(<SettingsContent actions={viewActions()} model={viewModel(saveState)} />);
+      expect(html).toContain(getSettingsSaveLabel(saveState));
+      expect(html).toContain("Einstellungen speichern");
+      expect(html).not.toContain("role=\"toolbar\"");
+      expect(html).not.toContain("table-pagination");
+      expect(html).not.toContain("ui-context-info");
+    }
+  });
+
+  it("renders the sidebar and content once in the complete view", () => {
+    const html = renderToStaticMarkup(<SettingsView actions={viewActions()} model={viewModel()} />);
+    expect(count(html, "data-visual-region=\"settings-sidebar\"")).toBe(1);
+    expect(count(html, "data-visual-region=\"accounts-table-body\"")).toBe(1);
+  });
+
+  it("renders form controls, theme choices and switches through bounded callbacks", () => {
+    let changed = "";
+    const form = SettingsForm({
+      model: formModel(),
+      actions: {
+        onChange: (id) => { changed = id; },
+        onAction: () => {}
+      }
+    });
+    const html = renderToStaticMarkup(form);
+
+    expect(html).toContain("Light");
+    expect(html).toContain("Dark");
+    expect(html).toContain("System");
+    expect(html).toContain("role=\"switch\"");
+    const switchButton = findElement(form, (element) => element.props.role === "switch");
+    switchButton.props.onClick();
+    expect(changed).toBe("autoUpdate");
+  });
+});
+
+describe("account workspace", () => {
+  it("renders the exact columns, one table marker, full usernames and no raw credentials", () => {
+    const html = renderToStaticMarkup(<AccountWorkspace actions={workspaceActions()} model={workspaceModel()} />);
+    const positions = ACCOUNT_COLUMNS.map((column) => html.indexOf(column));
+
+    expect(positions.every((position) => position >= 0)).toBe(true);
+    expect(positions).toEqual([...positions].sort((a, b) => a - b));
+    expect(count(html, "data-visual-region=\"accounts-table-body\"")).toBe(1);
+    expect(html).toContain("verified@example.test");
+    expect(html).not.toContain("ve***st");
+    expect(html).toContain("••••••");
+    expect(html).not.toContain("test-password");
+    expect(html).not.toContain("test-token");
+    expect(html).not.toContain("table-pagination");
+    expect(html).not.toContain("role=\"toolbar\"");
+  });
+
+  it("keeps row selection, enable toggles, edit and context actions separate", () => {
+    const calls: string[] = [];
+    const tree = AccountWorkspace({
+      model: workspaceModel(),
+      actions: workspaceActions({
+        onSelect: (id) => calls.push(`select:${id}`),
+        onToggleEnabled: (id) => calls.push(`toggle:${id}`),
+        onEdit: (id) => calls.push(`edit:${id}`),
+        onContextMenu: (id) => calls.push(`context:${id}`)
+      })
+    });
+    const row = findElement(tree, (element) => element.props.role === "row" && element.props["aria-selected"] === true);
+    const checkbox = findElement(row, (element) => element.type === "input" && element.props.type === "checkbox");
+    const actionButton = findElement(row, (element) => element.type === "button" && String(element.props["aria-label"] || "").includes("Aktionen"));
+    const rowId = workspaceModel().rows[0].id;
+
+    row.props.onClick({ target: { role: "cell" }, currentTarget: row });
+    row.props.onKeyDown({ key: "Enter", target: row, currentTarget: row, preventDefault: () => {} });
+    row.props.onKeyDown({ key: " ", target: checkbox, currentTarget: row, preventDefault: () => {} });
+    checkbox.props.onChange();
+    row.props.onDoubleClick();
+    actionButton.props.onClick({ stopPropagation: () => {}, currentTarget: { getBoundingClientRect: () => ({ right: 20, bottom: 30 }) } });
+
+    expect(calls).toEqual([
+      `select:${rowId}`,
+      `select:${rowId}`,
+      `toggle:${rowId}`,
+      `edit:${rowId}`,
+      `context:${rowId}`
+    ]);
+  });
+
+  it("keeps overview and rules in the same workspace while only one panel is active", () => {
+    const html = renderToStaticMarkup(<AccountWorkspace actions={workspaceActions()} model={workspaceModel()} />);
+    expect(count(html, "class=\"settings-account-panel\"")).toBe(2);
+    expect(count(html, "hidden=\"\"")).toBe(1);
+    expect(html).toContain("Provider-Reihenfolge");
+    expect(html).toContain("Hoster-Routing");
+    expect(html).toContain("Automatischer Fallback");
+  });
+
+  it("keeps add and edit dialogs separate and every secret field protected", () => {
+    const addHtml = renderToStaticMarkup(
+      <AccountAddDialog
+        actions={{
+          onQueryChange: () => {},
+          onFilterChange: () => {},
+          onOptionSelect: () => {},
+          onFieldChange: () => {},
+          onClose: () => {},
+          onSubmit: () => {}
+        }}
+        model={{
+          open: true,
+          query: "",
+          filter: "all",
+          options: accountOptions(),
+          selectedOptionId: "megadebrid-api",
+          fields: [
+            { id: "login", label: "Login", type: "text", value: "member@example.test" },
+            { id: "password", label: "Passwort", type: "password", value: "test-password" }
+          ],
+          error: "",
+          busy: false
+        }}
+      />
+    );
+    const editHtml = renderToStaticMarkup(
+      <AccountEditDialog
+        actions={{
+          onFieldChange: () => {},
+          onClose: () => {},
+          onCheck: () => {},
+          onSave: () => {},
+          onRemove: () => {},
+          onToggleEnabled: () => {}
+        }}
+        model={{
+          open: true,
+          hoster: "Mega-Debrid",
+          mode: "API",
+          identity: "member@example.test",
+          enabled: true,
+          fields: [
+            { id: "login", label: "Login", type: "text", value: "member@example.test" },
+            { id: "password", label: "Passwort", type: "password", value: "test-password" },
+            { id: "token", label: "Token", type: "password", value: "test-token" }
+          ],
+          error: "",
+          busy: false
+        }}
+      />
+    );
+
+    expect(addHtml).toContain("Account hinzufügen");
+    expect(addHtml).toContain("Prüfen und speichern");
+    expect(addHtml).toContain("Alle");
+    expect(addHtml).toContain("API");
+    expect(addHtml).toContain("Web");
+    expect(editHtml).toContain("Account bearbeiten");
+    expect(editHtml).toContain("member@example.test");
+    expect(editHtml).toContain("Entfernen");
+    expect(editHtml).toContain("Prüfen");
+    expect(count(addHtml, "type=\"password\"")).toBe(1);
+    expect(count(editHtml, "type=\"password\"")).toBe(2);
+  });
+});
+
+describe("settings App integration", () => {
+  it("keeps specific persistence revision-safe when the draft changes in flight", () => {
+    const block = sourceBlock(appSource, "const persistSpecificSettings", "const runAccountQuickAction");
+    expect(block).toContain("revisionAtStart");
+    expect(block).toContain("mergeConcurrentSpecificSettings");
+    expect(block).toContain('setSettingsSaveState("dirty")');
+  });
+
+  it("keeps unchecked single accounts honest without a positive status", () => {
+    const block = sourceBlock(appSource, "const accountSources", "const selectedAccountViewId");
+    expect(block).toMatch(/:\s*!checkedStatus\s*\?\s*"unchecked"/s);
+  });
+
+  it("stores only the stable account row id in context-menu state", () => {
+    const stateBlock = sourceBlock(appSource, "interface AccountContextMenuState", "function getAccountQuickActionMeta");
+    expect(stateBlock).toContain("rowId: string");
+    expect(stateBlock).not.toContain("row: AccountTableRow");
+    expect(appSource).toContain("activeAccountContextRow");
+  });
+
+  it("preserves the System theme choice while applying its resolved palette", () => {
+    expect(appSource).toContain("settingsThemeChoice");
+    expect(appSource).toContain("resolveSettingsThemeChoice");
+  });
+});
+
+describe("settings geometry", () => {
+  it("keeps the specified form, table, switch, overflow and selection geometry", () => {
+    const css = readFileSync(new URL("../src/renderer/views/settings/settings.css", import.meta.url), "utf8");
+    expect(css).toMatch(/\.settings-content\s*{[^}]*padding:\s*24px;/s);
+    expect(css).toMatch(
+      /\.md-runtime-view-content\s*>\s*\.settings-content\s*{[^}]*height:\s*100%;[^}]*padding:\s*24px;/s
+    );
+    expect(css).toMatch(/\.settings-form-column\s*{[^}]*width:\s*500px;[^}]*max-width:\s*100%;/s);
+    expect(css).toMatch(/\.settings-control\s*{[^}]*height:\s*44px;[^}]*border-radius:\s*6px;/s);
+    expect(css).toMatch(/\.settings-switch\s*{[^}]*width:\s*40px;[^}]*height:\s*20px;/s);
+    expect(css).toMatch(/\.settings-account-table-header\s*{[^}]*height:\s*41px;/s);
+    expect(css).toMatch(/\.settings-account-table-header\s*{[^}]*overflow:\s*hidden;/s);
+    expect(css).toMatch(/\.settings-account-row\s*{[^}]*height:\s*48px;/s);
+    expect(css).toMatch(/\.settings-account-table-body\s*{[^}]*overflow:\s*auto;/s);
+    expect(accountWorkspaceSource).toContain("onScroll={syncAccountTableScroll}");
+    expect(css).toMatch(/\.settings-view\s*{[^}]*min-width:\s*0;/s);
+    expect(css).toMatch(/\.settings-account-workspace\s*{[^}]*width:\s*100%;[^}]*min-width:\s*0;[^}]*min-height:\s*0;/s);
+    expect(css).toMatch(/\.settings-static\s*{[^}]*user-select:\s*none;/s);
+    expect(css).toMatch(/\.settings-content\s+:where\(input,\s*textarea,\s*\[contenteditable="true"\],\s*\.settings-copyable\)\s*{[^}]*user-select:\s*text;/s);
+  });
+});

tests/statistics-view.test.tsx

@@ -0,0 +1,399 @@
+import { isValidElement, type ReactElement, type ReactNode } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import type { DownloadItem, DownloadStatus, UiSnapshot } from "../src/shared/types";
+import { readBandwidthChartPalette } from "../src/renderer/App";
+import {
+  buildStatisticsViewModel,
+  type StatisticsMetric,
+  type StatisticsRange
+} from "../src/renderer/views/statistics/statistics-model";
+import {
+  StatisticsContent,
+  StatisticsSidebar,
+  StatisticsView,
+  type StatisticsViewActions
+} from "../src/renderer/views/statistics/StatisticsView";
+import { createVisualFixture } from "./visual/fixtures";
+
+const now = new Date(2026, 7, 10, 12, 0, 0, 0).getTime();
+
+function createSnapshot(): UiSnapshot {
+  return structuredClone(createVisualFixture("empty").snapshot);
+}
+
+function item(
+  id: string,
+  status: DownloadStatus,
+  overrides: Partial<DownloadItem> = {}
+): DownloadItem {
+  return {
+    id,
+    packageId: "statistics-package",
+    url: `https://url-host-${id}.example/file`,
+    provider: "realdebrid",
+    providerLabel: "Real-Debrid",
+    status,
+    retries: 0,
+    speedBps: 0,
+    downloadedBytes: 100,
+    totalBytes: 100,
+    progressPercent: status === "completed" ? 100 : 50,
+    fileName: `${id}.bin`,
+    targetPath: `C:\\Downloads\\${id}.bin`,
+    resumable: true,
+    attempts: 1,
+    lastError: status === "failed" ? "Fehlgeschlagen" : "",
+    fullStatus: status,
+    createdAt: now - 1000,
+    updatedAt: now,
+    ...overrides
+  };
+}
+
+function setItems(snapshot: UiSnapshot, items: DownloadItem[]): void {
+  snapshot.session.items = Object.fromEntries(items.map((entry) => [entry.id, entry]));
+}
+
+function visitElements(node: ReactNode, visit: (element: ReactElement) => void): void {
+  if (Array.isArray(node)) {
+    node.forEach((child) => visitElements(child, visit));
+    return;
+  }
+  if (!isValidElement(node)) {
+    return;
+  }
+  visit(node);
+  visitElements(node.props.children, visit);
+}
+
+function findButton(node: ReactNode, label: string): ReactElement {
+  let result: ReactElement | null = null;
+  visitElements(node, (element) => {
+    if (!result && element.type === "button" && element.props.children === label) {
+      result = element;
+    }
+  });
+  if (!result) {
+    throw new Error(`Button not found: ${label}`);
+  }
+  return result;
+}
+
+function createActions(overrides: Partial<StatisticsViewActions> = {}): StatisticsViewActions {
+  return {
+    onRangeChange: () => {},
+    onResetSession: () => {},
+    onResetAll: () => {},
+    onResetErrors: () => {},
+    ...overrides
+  };
+}
+
+function expectUnavailable(metric: StatisticsMetric): void {
+  expect(metric).toMatchObject({ value: null, available: false });
+  expect(metric.sourceLabel.trim()).not.toBe("");
+}
+
+describe("statistics model", () => {
+  it("uses real snapshot session fields and excludes active or waiting downloads from the success denominator", () => {
+    const snapshot = createSnapshot();
+    snapshot.stats.totalDownloaded = 600;
+    snapshot.stats.totalFilesSession = 3;
+    snapshot.session.running = true;
+    setItems(snapshot, [
+      item("complete-a", "completed"),
+      item("complete-b", "completed"),
+      item("complete-c", "completed"),
+      item("failed", "failed"),
+      item("active", "downloading"),
+      item("waiting", "queued")
+    ]);
+
+    const model = buildStatisticsViewModel(snapshot, "session", now);
+
+    expect(model.metrics.downloadedBytes.value).toBe(600);
+    expect(model.metrics.files.value).toBe(3);
+    expect(model.metrics.successRate.value).toBe(75);
+    expect(model.metrics.errors.value).toBe(1);
+  });
+
+  it("reports no success rate when the current queue has no completed or failed result", () => {
+    const snapshot = createSnapshot();
+    snapshot.session.running = true;
+    setItems(snapshot, [item("active", "downloading"), item("waiting", "queued")]);
+
+    const model = buildStatisticsViewModel(snapshot, "session", now);
+
+    expectUnavailable(model.metrics.successRate);
+    expect(model.metrics.errors).toMatchObject({ value: 0, available: true });
+  });
+
+  it("sorts current-queue providers by bytes and then id without deriving them from URL hostnames", () => {
+    const snapshot = createSnapshot();
+    snapshot.session.running = true;
+    setItems(snapshot, [
+      item("real", "completed", {
+        url: "https://alldebrid.invalid/wrong-source",
+        provider: "realdebrid",
+        providerLabel: "Real-Debrid Konto",
+        downloadedBytes: 200
+      }),
+      item("all", "failed", {
+        url: "https://realdebrid.invalid/wrong-source",
+        provider: "alldebrid",
+        providerLabel: "AllDebrid",
+        downloadedBytes: 200
+      }),
+      item("link", "completed", {
+        url: "https://realdebrid.invalid/also-wrong",
+        provider: "debridlink",
+        providerLabel: "Debrid-Link",
+        downloadedBytes: 400
+      }),
+      item("unknown", "completed", {
+        url: "https://hoster-only.invalid/not-a-provider",
+        provider: null,
+        providerLabel: undefined,
+        downloadedBytes: 900
+      })
+    ]);
+
+    const model = buildStatisticsViewModel(snapshot, "session", now);
+
+    expect(model.providers.map((row) => row.id)).toEqual(["debridlink", "alldebrid", "realdebrid"]);
+    expect(model.providers.map((row) => row.label)).toEqual(["Debrid-Link", "AllDebrid", "Real-Debrid Konto"]);
+    expect(model.providers.map((row) => [row.completed, row.failed])).toEqual([[1, 0], [0, 1], [1, 0]]);
+    expect(model.providers.some((row) => row.id.includes("host"))).toBe(false);
+  });
+
+  it("uses daily provider usage only for the matching local day", () => {
+    const snapshot = createSnapshot();
+    snapshot.stats.totalDownloaded = 999_999;
+    snapshot.settings.providerDailyUsageDay = "2026-08-10";
+    snapshot.settings.providerDailyUsageBytes = { realdebrid: 500, alldebrid: 1_500 };
+
+    const model = buildStatisticsViewModel(snapshot, "today", now);
+
+    expect(model.metrics.downloadedBytes).toMatchObject({ value: 2_000, available: true });
+    expect(model.providers.map((row) => [row.id, row.bytes])).toEqual([
+      ["alldebrid", 1_500],
+      ["realdebrid", 500]
+    ]);
+    expectUnavailable(model.metrics.files);
+    expectUnavailable(model.metrics.successRate);
+    expectUnavailable(model.metrics.errors);
+    expectUnavailable(model.metrics.averageSpeedBps);
+  });
+
+  it("treats a stale daily key as a genuine zero today without stale provider rows", () => {
+    const snapshot = createSnapshot();
+    snapshot.settings.providerDailyUsageDay = "2026-08-09";
+    snapshot.settings.providerDailyUsageBytes = { realdebrid: 900 };
+
+    const model = buildStatisticsViewModel(snapshot, "today", now);
+
+    expect(model.metrics.downloadedBytes).toMatchObject({ value: 0, available: true });
+    expect(model.providers).toEqual([]);
+  });
+
+  it.each(["week", "month"] satisfies StatisticsRange[])("keeps %s unavailable without inventing historical buckets", (range) => {
+    const snapshot = createSnapshot();
+    snapshot.stats.totalDownloaded = 5_000;
+    snapshot.stats.totalDownloadedAllTime = 50_000;
+    snapshot.settings.providerDailyUsageDay = "2026-08-10";
+    snapshot.settings.providerDailyUsageBytes = { realdebrid: 4_000 };
+    snapshot.settings.providerTotalUsageBytes = { realdebrid: 40_000 };
+
+    const model = buildStatisticsViewModel(snapshot, range, now);
+
+    expect(model.coverage).toBe("unavailable");
+    expect(model.message).toBe("Für diesen Zeitraum werden noch keine historischen Daten gespeichert.");
+    expect(model.providers).toEqual([]);
+    expect(model.providerScope).toBeNull();
+    Object.values(model.metrics).forEach(expectUnavailable);
+  });
+
+  it("uses all-time counters and provider totals without inventing historical outcomes", () => {
+    const snapshot = createSnapshot();
+    snapshot.stats.totalDownloadedAllTime = 25_000;
+    snapshot.stats.totalFilesAllTime = 42;
+    snapshot.settings.providerTotalUsageBytes = { realdebrid: 5_000, debridlink: 20_000 };
+    snapshot.summary = {
+      total: 10,
+      success: 9,
+      failed: 1,
+      cancelled: 0,
+      extracted: 9,
+      durationSeconds: 10,
+      averageSpeedBps: 2_500
+    };
+
+    const model = buildStatisticsViewModel(snapshot, "all", now);
+
+    expect(model.metrics.downloadedBytes.value).toBe(25_000);
+    expect(model.metrics.files.value).toBe(42);
+    expect(model.providers.map((row) => [row.id, row.bytes])).toEqual([
+      ["debridlink", 20_000],
+      ["realdebrid", 5_000]
+    ]);
+    expect(model.providers.every((row) => row.completed === null && row.failed === null)).toBe(true);
+    expectUnavailable(model.metrics.successRate);
+    expectUnavailable(model.metrics.errors);
+    expectUnavailable(model.metrics.averageSpeedBps);
+  });
+
+  it("prefers live queue outcomes over an old summary and uses the summary only after the run ends", () => {
+    const snapshot = createSnapshot();
+    setItems(snapshot, [
+      item("complete-a", "completed"),
+      item("complete-b", "completed"),
+      item("complete-c", "completed"),
+      item("failed", "failed")
+    ]);
+    snapshot.summary = {
+      total: 4,
+      success: 1,
+      failed: 3,
+      cancelled: 0,
+      extracted: 1,
+      durationSeconds: 100,
+      averageSpeedBps: 500
+    };
+    snapshot.session.running = true;
+
+    const active = buildStatisticsViewModel(snapshot, "session", now);
+    snapshot.session.running = false;
+    const ended = buildStatisticsViewModel(snapshot, "session", now);
+
+    expect(active.metrics.successRate.value).toBe(75);
+    expect(active.metrics.errors.value).toBe(1);
+    expectUnavailable(active.metrics.averageSpeedBps);
+    expect(ended.metrics.successRate.value).toBe(25);
+    expect(ended.metrics.errors.value).toBe(3);
+    expect(ended.metrics.averageSpeedBps).toMatchObject({ value: 500, available: true });
+  });
+
+  it("models empty, idle, active and paused session states separately", () => {
+    const empty = createSnapshot();
+    const idle = createSnapshot();
+    setItems(idle, [item("idle", "completed")]);
+    const active = createSnapshot();
+    active.session.running = true;
+    setItems(active, [item("active", "downloading")]);
+    const paused = createSnapshot();
+    paused.session.running = true;
+    paused.session.paused = true;
+    setItems(paused, [item("paused", "paused")]);
+
+    expect(buildStatisticsViewModel(empty, "session", now).sessionState).toBe("empty");
+    expect(buildStatisticsViewModel(idle, "session", now).sessionState).toBe("idle");
+    expect(buildStatisticsViewModel(active, "session", now).sessionState).toBe("active");
+    expect(buildStatisticsViewModel(paused, "session", now).sessionState).toBe("paused");
+  });
+});
+
+describe("statistics view", () => {
+  it("renders each statistics marker exactly once, all ranges and no download toolbar or pagination", () => {
+    const snapshot = createSnapshot();
+    snapshot.stats.totalDownloaded = 2_048;
+    snapshot.stats.totalFilesSession = 1;
+    setItems(snapshot, [item("complete", "completed")]);
+    const html = renderToStaticMarkup(
+      <StatisticsView
+        actions={createActions()}
+        chart={<div>Bestehender Bandbreitenverlauf</div>}
+        model={buildStatisticsViewModel(snapshot, "session", now)}
+      />
+    );
+
+    for (const marker of ["statistics-sidebar", "statistics-kpis", "statistics-chart"]) {
+      expect(html.match(new RegExp(`data-visual-region=\\"${marker}\\"`, "g"))).toHaveLength(1);
+    }
+    for (const label of ["Sitzung", "Heute", "Sieben Tage", "30 Tage", "Gesamt"]) {
+      expect(html).toContain(`>${label}<`);
+    }
+    expect(html).toContain("Bestehender Bandbreitenverlauf");
+    expect(html).not.toContain("downloads-toolbar");
+    expect(html.toLocaleLowerCase("de-DE")).not.toContain("pagination");
+  });
+
+  it("dispatches range and reset controls only through the supplied callbacks", () => {
+    const snapshot = createSnapshot();
+    setItems(snapshot, [item("failed", "failed")]);
+    const model = buildStatisticsViewModel(snapshot, "session", now);
+    const calls: string[] = [];
+    const actions = createActions({
+      onRangeChange: (range) => calls.push(`range:${range}`),
+      onResetSession: () => calls.push("reset:session"),
+      onResetAll: () => calls.push("reset:all"),
+      onResetErrors: () => calls.push("reset:errors")
+    });
+    const sidebar = StatisticsSidebar({ actions, model });
+    const content = StatisticsContent({ actions, chart: <div />, model });
+
+    findButton(sidebar, "Heute").props.onClick();
+    findButton(content, "Sitzung zurücksetzen").props.onClick();
+    findButton(content, "Gesamt zurücksetzen").props.onClick();
+    findButton(content, "Fehler zurücksetzen").props.onClick();
+
+    expect(calls).toEqual(["range:today", "reset:session", "reset:all", "reset:errors"]);
+  });
+
+  it("enables error reset only for a positive genuine error metric", () => {
+    const clean = createSnapshot();
+    const failed = createSnapshot();
+    setItems(failed, [item("failed", "failed")]);
+
+    const cleanContent = StatisticsContent({
+      actions: createActions(),
+      chart: <div />,
+      model: buildStatisticsViewModel(clean, "session", now)
+    });
+    const failedContent = StatisticsContent({
+      actions: createActions(),
+      chart: <div />,
+      model: buildStatisticsViewModel(failed, "session", now)
+    });
+
+    expect(findButton(cleanContent, "Fehler zurücksetzen").props.disabled).toBe(true);
+    expect(findButton(failedContent, "Fehler zurücksetzen").props.disabled).toBe(false);
+  });
+
+  it("keeps the empty provider state inside the ARIA table as a row and spanning cell", () => {
+    const html = renderToStaticMarkup(
+      <StatisticsContent
+        actions={createActions()}
+        chart={<div />}
+        model={buildStatisticsViewModel(createSnapshot(), "session", now)}
+      />
+    );
+
+    expect(html).toContain('class="statistics-provider-empty" role="row"');
+    expect(html).toContain('aria-colspan="3" role="cell"');
+  });
+});
+
+describe("bandwidth chart palette", () => {
+  it("requests only the semantic UI color properties and keeps the computed font family", () => {
+    const requested: string[] = [];
+    const values: Record<string, string> = {
+      "--ui-border": " rgb(61, 61, 61) ",
+      "--ui-text-muted": " rgb(145, 145, 145) ",
+      "--ui-accent": " rgb(56, 134, 255) "
+    };
+
+    const palette = readBandwidthChartPalette((property) => {
+      requested.push(property);
+      return values[property];
+    }, "Inter, Segoe UI, sans-serif");
+
+    expect(requested).toEqual(["--ui-border", "--ui-text-muted", "--ui-accent"]);
+    expect(palette).toEqual({
+      grid: "rgb(61, 61, 61)",
+      text: "rgb(145, 145, 145)",
+      accent: "rgb(56, 134, 255)",
+      fontFamily: "Inter, Segoe UI, sans-serif"
+    });
+  });
+});

tests/toast.test.tsx

@@ -0,0 +1,17 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import { Toast } from "../src/renderer/ui/Toast";
+
+describe("Toast", () => {
+  it("announces the current single toast politely", () => {
+    const html = renderToStaticMarkup(<Toast message="Einstellungen gespeichert" />);
+
+    expect(html).toContain("role=\"status\"");
+    expect(html).toContain("aria-live=\"polite\"");
+    expect(html).toContain("Einstellungen gespeichert");
+  });
+
+  it("renders nothing without a message", () => {
+    expect(renderToStaticMarkup(<Toast message="" />)).toBe("");
+  });
+});

tests/ui-primitives.test.tsx

@@ -0,0 +1,184 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import { ContextInfoButton } from "../src/renderer/ui/ContextInfoButton";
+import {
+  DataTable,
+  DataTableBody,
+  DataTableEmpty,
+  DataTableFooter,
+  DataTableHeader
+} from "../src/renderer/ui/DataTable";
+import { Icon } from "../src/renderer/ui/Icon";
+import { Toolbar, ToolbarGroup, ToolbarSearch } from "../src/renderer/ui/Toolbar";
+import { getThemeVariables, UI_FOCUS_RING_VARIABLE } from "../src/renderer/ui/theme";
+
+const expectedThemes = {
+  dark: {
+    "--ui-canvas": "#0F0F0F",
+    "--ui-surface": "#232323",
+    "--ui-input": "#2B2B2B",
+    "--ui-table-header": "#313131",
+    "--ui-active": "#333436",
+    "--ui-hover": "#373535",
+    "--ui-tooltip": "#4F4D4D",
+    "--ui-border": "#3D3D3D",
+    "--ui-text": "#FFFFFF",
+    "--ui-text-secondary": "#EAEDF3",
+    "--ui-text-muted": "#919191",
+    "--ui-primary": "#BAD0FC",
+    "--ui-primary-hover": "#8AA5DC",
+    "--ui-accent": "#3886FF",
+    "--ui-warning": "#F1C786",
+    "--ui-danger": "#F06464",
+    "--ui-modal-secondary": "#35383D",
+    "--ui-overlay": "rgba(0, 0, 0, 0.60)"
+  },
+  light: {
+    "--ui-canvas": "#F3F4F6",
+    "--ui-surface": "#FFFFFF",
+    "--ui-input": "#F7F8FA",
+    "--ui-table-header": "#E7E9ED",
+    "--ui-active": "#DEE6F5",
+    "--ui-hover": "#E8ECF3",
+    "--ui-tooltip": "#35383D",
+    "--ui-border": "#D0D4DB",
+    "--ui-text": "#181A1F",
+    "--ui-text-secondary": "#343842",
+    "--ui-text-muted": "#667085",
+    "--ui-primary": "#A9C2F3",
+    "--ui-primary-hover": "#8AA5DC",
+    "--ui-accent": "#256FDB",
+    "--ui-warning": "#E8B85D",
+    "--ui-danger": "#D94747",
+    "--ui-modal-secondary": "#E7E9ED",
+    "--ui-overlay": "rgba(0, 0, 0, 0.45)"
+  }
+} as const;
+
+function relativeLuminance(color: string): number {
+  const channels = color.slice(1).match(/.{2}/g)?.map((value) => Number.parseInt(value, 16) / 255) ?? [];
+  const [red, green, blue] = channels.map((value) => value <= 0.04045 ? value / 12.92 : ((value + 0.055) / 1.055) ** 2.4);
+  return 0.2126 * red + 0.7152 * green + 0.0722 * blue;
+}
+
+function contrastRatio(first: string, second: string): number {
+  const lighter = Math.max(relativeLuminance(first), relativeLuminance(second));
+  const darker = Math.min(relativeLuminance(first), relativeLuminance(second));
+  return (lighter + 0.05) / (darker + 0.05);
+}
+
+describe("semantic themes", () => {
+  it("exposes the exact frozen semantic roles for dark and light", () => {
+    const dark = getThemeVariables("dark");
+    const light = getThemeVariables("light");
+
+    expect(dark).toEqual(expectedThemes.dark);
+    expect(light).toEqual(expectedThemes.light);
+    expect(Object.keys(dark)).toEqual(Object.keys(light));
+    expect(Object.keys(dark)).toHaveLength(18);
+    expect(Object.isFrozen(dark)).toBe(true);
+    expect(Object.isFrozen(light)).toBe(true);
+  });
+
+  it("uses a focus ring role with at least 3 to 1 contrast on control surfaces", () => {
+    for (const theme of ["dark", "light"] as const) {
+      const variables = getThemeVariables(theme);
+      const focus = variables[UI_FOCUS_RING_VARIABLE];
+      for (const surface of ["--ui-canvas", "--ui-surface", "--ui-input", "--ui-active", "--ui-hover"] as const) {
+        expect(contrastRatio(focus, variables[surface]), `${theme} focus on ${surface}`).toBeGreaterThanOrEqual(3);
+      }
+    }
+  });
+});
+
+describe("new UI primitives", () => {
+  it("renders labelled current-color outline icons without emoji text", () => {
+    const html = renderToStaticMarkup(<Icon name="download" label="Downloads" />);
+
+    expect(html).toContain("aria-label=\"Downloads\"");
+    expect(html).toContain("<svg");
+    expect(html).toContain("stroke=\"currentColor\"");
+    expect(html).not.toMatch(/[\u{1F300}-\u{1FAFF}]/u);
+  });
+
+  it("gives toolbar roles and search controls accessible names", () => {
+    const html = renderToStaticMarkup(
+      <Toolbar label="Downloadaktionen">
+        <ToolbarGroup label="Steuerung">
+          <button type="button">Start</button>
+        </ToolbarGroup>
+        <ToolbarSearch label="Downloads durchsuchen" value="paket" onChange={() => {}} />
+      </Toolbar>
+    );
+
+    expect(html).toContain("role=\"toolbar\"");
+    expect(html).toContain("aria-label=\"Downloadaktionen\"");
+    expect(html).toContain("role=\"group\"");
+    expect(html).toContain("aria-label=\"Steuerung\"");
+    expect(html).toContain("type=\"search\"");
+    expect(html).toContain("aria-label=\"Downloads durchsuchen\"");
+  });
+
+  it("keeps empty content inside the aria table body", () => {
+    const html = renderToStaticMarkup(
+      <DataTable>
+        <DataTableHeader>Spalten</DataTableHeader>
+        <DataTableBody>
+          <DataTableEmpty title="Keine Einträge" description="Noch sind keine Daten vorhanden." />
+        </DataTableBody>
+        <DataTableFooter pageSize={10} rangeLabel="0 von 0" paginationVisible />
+      </DataTable>
+    );
+
+    expect(html).toContain("role=\"table\"");
+    expect(html).toContain("aria-label=\"Datentabelle\"");
+    expect(html.indexOf("Keine Einträge")).toBeGreaterThan(html.indexOf("data-ui-region=\"table-body\""));
+    expect(html).not.toContain("<table");
+    expect(html).toContain("10 pro Seite");
+    expect(html).toContain("0 von 0");
+  });
+
+  it("omits the entire footer when pagination is not visible", () => {
+    const html = renderToStaticMarkup(
+      <DataTableFooter pageSize={25} rangeLabel="1–25 von 80" paginationVisible={false} />
+    );
+
+    expect(html).toBe("");
+  });
+
+  it.each([
+    ["null", null],
+    ["false", false],
+    ["whitespace", "   \n\t"],
+    ["empty array", []],
+    ["nested empty array", [null, false, "  ", []]]
+  ])("omits context help for %s content", (_label, content) => {
+    const html = renderToStaticMarkup(
+      <ContextInfoButton
+        contextName="Downloads"
+        content={content}
+        open={false}
+        onOpenChange={() => {}}
+      />
+    );
+
+    expect(html).toBe("");
+  });
+
+  it("renders an accessible trigger and named region for open real help", () => {
+    const html = renderToStaticMarkup(
+      <ContextInfoButton
+        contextName="Downloads"
+        content={["Vorhandene ", <strong key="help">Download-Hilfe</strong>]}
+        open
+        onOpenChange={() => {}}
+      />
+    );
+
+    expect(html).toContain("aria-label=\"Informationen\"");
+    expect(html).toContain("aria-expanded=\"true\"");
+    expect(html).toContain("role=\"region\"");
+    expect(html).toContain("aria-label=\"Informationen zu Downloads\"");
+    expect(html).toContain("Vorhandene <strong>Download-Hilfe</strong>");
+  });
+});

tests/update-experience.test.tsx

@@ -0,0 +1,182 @@
+import { readFileSync } from "node:fs";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vitest";
+import { runLatestUpdateCheck, shouldApplyUpdateCheckResult } from "../src/renderer/App";
+import type { UpdateCheckResult } from "../src/shared/types";
+import { AppHeader } from "../src/renderer/shell/AppHeader";
+import { getUpdateDialogFocusTarget, UpdateExperience } from "../src/renderer/shell/UpdateExperience";
+
+const callbacks = {
+  onOpen: () => {},
+  onClose: () => {},
+  onInstall: () => {},
+  onLater: () => {}
+};
+
+describe("update experience", () => {
+  it("renders the available update and prompt as one accessible experience", () => {
+    const html = renderToStaticMarkup(
+      <UpdateExperience
+        available
+        currentVersion="v2.0.12"
+        latestTag="v9.9.9"
+        open
+        progress={0}
+        releaseNotes="Changes"
+        state="prompt"
+        {...callbacks}
+      />
+    );
+
+    expect(html).toContain("aria-label=\"Update verfügbar\"");
+    expect(html).toContain("role=\"tooltip\"");
+    expect(html).toContain("Eine neue Version ist bereit. Klicke hier, um sie zu installieren.");
+    expect(html).toContain("role=\"dialog\"");
+    expect(html).toContain("aria-modal=\"true\"");
+    expect(html).toContain("Update installieren");
+    expect(html).toContain("Jetzt aktualisieren");
+    expect(html).toContain("Später");
+    expect(html).toContain("Changes");
+    expect(html).toContain("<details");
+  });
+
+  it("keeps the update affordance but removes the dialog when the prompt is closed", () => {
+    const html = renderToStaticMarkup(
+      <UpdateExperience
+        available
+        currentVersion="v2.0.12"
+        latestTag="v9.9.9"
+        open={false}
+        progress={0}
+        releaseNotes="Changes"
+        state="prompt"
+        {...callbacks}
+      />
+    );
+
+    expect(html).toContain("aria-label=\"Update verfügbar\"");
+    expect(html).not.toContain("role=\"dialog\"");
+  });
+
+  it("renders active progress without controls that could close the installation", () => {
+    const html = renderToStaticMarkup(
+      <UpdateExperience
+        available
+        currentVersion="v2.0.12"
+        latestTag="v9.9.9"
+        open
+        progress={{ percent: 47, text: "Update-Download: 47% (47 MB / 100 MB)" }}
+        releaseNotes=""
+        state="downloading"
+        {...callbacks}
+      />
+    );
+
+    expect(html).toContain("Update-Download: 47% (47 MB / 100 MB)");
+    expect(html).toContain("aria-valuenow=\"47\"");
+    expect(html).not.toContain("Später");
+    expect(html).not.toContain("Jetzt aktualisieren");
+    expect(html).not.toContain("aria-label=\"Schließen\"");
+  });
+
+  it("preserves the original installation error in the reusable dialog", () => {
+    const html = renderToStaticMarkup(
+      <UpdateExperience
+        available
+        currentVersion="v2.0.12"
+        latestTag="v9.9.9"
+        open
+        progress={{ percent: null, text: "Update-Fehler: Originale Prüfsummenmeldung" }}
+        releaseNotes=""
+        state="error"
+        {...callbacks}
+      />
+    );
+
+    expect(html).toContain("Update-Fehler: Originale Prüfsummenmeldung");
+    expect(html).toContain("aria-label=\"Schließen\"");
+  });
+
+  it("renders nothing when no update is available and no dialog is active", () => {
+    const html = renderToStaticMarkup(
+      <UpdateExperience
+        available={false}
+        currentVersion="v2.0.12"
+        latestTag=""
+        open={false}
+        progress={0}
+        releaseNotes=""
+        state="prompt"
+        {...callbacks}
+      />
+    );
+
+    expect(html).toBe("");
+  });
+
+  it("places the update affordance in the accessible global header action group", () => {
+    const html = renderToStaticMarkup(
+      <AppHeader
+        activeView="downloads"
+        actions={(
+          <UpdateExperience
+            available
+            currentVersion="v2.0.12"
+            latestTag="v9.9.9"
+            open={false}
+            progress={0}
+            releaseNotes=""
+            state="prompt"
+            {...callbacks}
+          />
+        )}
+        onViewChange={() => {}}
+      />
+    );
+
+    expect(html).toContain("role=\"group\"");
+    expect(html).toContain("aria-label=\"Globale Aktionen\"");
+    expect(html).toContain("aria-label=\"Update verfügbar\"");
+  });
+
+  it("uses the specified transient and modal elevation tokens", () => {
+    const css = readFileSync(new URL("../src/renderer/shell/shell.css", import.meta.url), "utf8");
+
+    expect(css).toMatch(/\.md-update-tooltip\s*\{[^}]*box-shadow:\s*0 4px 12px rgb\(0 0 0 \/ 35%\)/s);
+    expect(css).toMatch(/\.md-update-dialog\s*\{[^}]*box-shadow:\s*0 12px 40px rgb\(0 0 0 \/ 45%\)/s);
+  });
+
+  it("keeps forward and reverse tabbing inside the update dialog", () => {
+    expect(getUpdateDialogFocusTarget(false, -1, 4)).toBe(0);
+    expect(getUpdateDialogFocusTarget(true, -1, 4)).toBe(3);
+    expect(getUpdateDialogFocusTarget(false, 3, 4)).toBe(0);
+    expect(getUpdateDialogFocusTarget(true, 0, 4)).toBe(3);
+    expect(getUpdateDialogFocusTarget(false, 1, 4)).toBeNull();
+    expect(getUpdateDialogFocusTarget(false, -1, 0)).toBeNull();
+  });
+
+  it("rejects stale update-check completions without discarding the latest state", () => {
+    expect(shouldApplyUpdateCheckResult(4, 4)).toBe(true);
+    expect(shouldApplyUpdateCheckResult(3, 4)).toBe(false);
+    expect(shouldApplyUpdateCheckResult(4, 5)).toBe(false);
+  });
+
+  it("applies only the latest result when update checks complete out of order", async () => {
+    const generation = { current: 0 };
+    const applied: string[] = [];
+    let finishStartup: ((result: UpdateCheckResult) => void) | undefined;
+    let finishManual: ((result: UpdateCheckResult) => void) | undefined;
+    const startup = new Promise<UpdateCheckResult>((resolve) => { finishStartup = resolve; });
+    const manual = new Promise<UpdateCheckResult>((resolve) => { finishManual = resolve; });
+    const apply = (result: UpdateCheckResult): void => { applied.push(result.latestTag); };
+
+    const startupRun = runLatestUpdateCheck(generation, () => startup, apply);
+    const manualRun = runLatestUpdateCheck(generation, () => manual, apply);
+    finishManual?.({ updateAvailable: true, currentVersion: "2.0.12", latestVersion: "9.9.9", latestTag: "v9.9.9", releaseUrl: "https://example.test/v9.9.9" });
+    await manualRun;
+    finishStartup?.({ updateAvailable: false, currentVersion: "2.0.12", latestVersion: "2.0.12", latestTag: "v2.0.12", releaseUrl: "https://example.test/v2.0.12" });
+    await startupRun;
+
+    expect(applied).toEqual(["v9.9.9"]);
+  });
+});

tests/visual-fixtures.test.ts

@@ -0,0 +1,271 @@
+import React, { type ReactElement } from "react";
+import { describe, expect, it } from "vitest";
+import { App } from "../src/renderer/App";
+import { parseDebridLinkApiKeys } from "../src/shared/debrid-link-keys";
+import { getMegaDebridAccountId } from "../src/shared/mega-debrid-accounts";
+import type { ElectronApi } from "../src/shared/preload-api";
+import * as visualFixtures from "./visual/fixtures";
+import * as visualMain from "./visual/main";
+import { createVisualElectronApi } from "./visual/mock-electron-api";
+
+const { createVisualFixture } = visualFixtures;
+
+interface TestVisualRoot {
+  innerText: string;
+  textContent: string | null;
+  dataset: {
+    visualError?: string;
+  };
+}
+
+interface TestVisualMarker {
+  visualReady?: string;
+  visualScenario?: string;
+}
+
+function createTestVisualBootstrap(
+  search: string,
+  initialInnerText: string,
+  onFrame: (frame: number, rootElement: TestVisualRoot) => void,
+  maxFrames = 2
+) {
+  const rootElement: TestVisualRoot = {
+    innerText: initialInnerText,
+    textContent: initialInnerText,
+    dataset: {}
+  };
+  const marker: TestVisualMarker = {};
+  const createdRootElements: TestVisualRoot[] = [];
+  const renderedElements: ReactElement[] = [];
+  const assignedApis: ElectronApi[] = [];
+  const markerValuesByFrame: Array<string | undefined> = [];
+  const clockInstalls: string[] = [];
+  let frameCount = 0;
+
+  const runtime = {
+    search,
+    rootElement,
+    marker,
+    maxFrames,
+    installClock(): void {
+      clockInstalls.push(search);
+    },
+    setElectronApi(api: ElectronApi): void {
+      assignedApis.push(api);
+    },
+    createRoot(element: TestVisualRoot) {
+      createdRootElements.push(element);
+      return {
+        render(renderedElement: ReactElement): void {
+          renderedElements.push(renderedElement);
+        }
+      };
+    },
+    requestFrame(callback: FrameRequestCallback): number {
+      frameCount += 1;
+      markerValuesByFrame.push(marker.visualReady);
+      onFrame(frameCount, rootElement);
+      callback(0);
+      return frameCount;
+    }
+  };
+
+  return {
+    runtime,
+    rootElement,
+    marker,
+    createdRootElements,
+    renderedElements,
+    assignedApis,
+    markerValuesByFrame,
+    clockInstalls
+  };
+}
+
+describe("visual fixtures", () => {
+  it("keeps empty, dense and update states deterministic and distinct", () => {
+    const empty = createVisualFixture("empty");
+    const dense = createVisualFixture("dense");
+    const update = createVisualFixture("update");
+    expect(Object.keys(empty.snapshot.session.packages)).toHaveLength(0);
+    expect(Object.keys(dense.snapshot.session.packages).length).toBeGreaterThan(1);
+    expect(update.update.latestTag).toBe("v9.9.9");
+    expect(createVisualFixture("dense")).toEqual(dense);
+  });
+
+  it("freezes runtime and recurring chart timers across visual frames", async () => {
+    const dense = createVisualFixture("dense");
+    const originalDateNow = Date.now;
+    let timerTicks = 0;
+    const timerTarget = {
+      setInterval(handler: TimerHandler, _timeout?: number): number {
+        if (typeof handler === "function") {
+          handler();
+        }
+        return 1;
+      }
+    };
+    const restore = visualFixtures.installVisualClock(timerTarget);
+
+    try {
+      const runtime = (): number => dense.snapshot.stats.sessionRuntimeMs
+        + Math.max(0, Date.now() - dense.snapshot.stats.runtimeMeasuredAt);
+      const firstRuntime = runtime();
+      const frameTimes: number[] = [];
+      timerTarget.setInterval(() => { timerTicks += 1; }, 250);
+      await visualFixtures.waitForVisualFrames((callback) => {
+        frameTimes.push(Date.now());
+        callback(0);
+        return frameTimes.length;
+      });
+      timerTarget.setInterval(() => { timerTicks += 1; }, 250);
+      timerTarget.setInterval(() => { timerTicks += 1; }, 1000);
+
+      expect(Date.now()).toBe(1786312800000);
+      expect(firstRuntime).toBe(3600000);
+      expect(runtime()).toBe(firstRuntime);
+      expect(frameTimes).toEqual([1786312800000, 1786312800000]);
+      expect(timerTicks).toBe(0);
+    } finally {
+      restore();
+    }
+
+    expect(Date.now).toBe(originalDateNow);
+  });
+
+  it("aligns dense account table values with credential-derived account IDs", async () => {
+    const dense = createVisualFixture("dense");
+    const settings = dense.snapshot.settings;
+    const megaAccountId = getMegaDebridAccountId(settings.megaLogin);
+    const debridLinkKeys = parseDebridLinkApiKeys(settings.debridLinkApiKeys);
+
+    expect(megaAccountId).toBe("mda_2f92guyzhdf6j");
+    expect(debridLinkKeys.map((entry) => entry.id)).toEqual([
+      "dlk_1ix5qlyx6mtm1",
+      "dlk_1ix5pfvlg4nkg"
+    ]);
+    expect(settings.debridAccountStatuses[megaAccountId]?.valid).toBe(true);
+    expect(settings.megaDebridAccountDailyLimitBytes[megaAccountId]).toBeGreaterThan(0);
+    expect(settings.megaDebridAccountDailyUsageBytes[megaAccountId]).toBeGreaterThan(0);
+    expect(settings.megaDebridAccountTotalUsageBytes[megaAccountId]).toBeGreaterThan(
+      settings.megaDebridAccountDailyUsageBytes[megaAccountId]
+    );
+
+    for (const entry of debridLinkKeys) {
+      expect(settings.debridAccountStatuses[entry.id]?.valid).toBe(true);
+      expect(settings.debridLinkApiKeyDailyLimitBytes[entry.id]).toBeGreaterThan(0);
+      expect(settings.debridLinkApiKeyDailyUsageBytes[entry.id]).toBeGreaterThan(0);
+      expect(settings.debridLinkApiKeyDailyUsageBytes[entry.id]).toBeLessThan(
+        settings.debridLinkApiKeyDailyLimitBytes[entry.id]
+      );
+      expect(settings.debridLinkApiKeyTotalUsageBytes[entry.id]).toBeGreaterThan(
+        settings.debridLinkApiKeyDailyUsageBytes[entry.id]
+      );
+    }
+
+    const debridLinkItem = Object.values(dense.snapshot.session.items).find(
+      (item) => item.provider === "debridlink"
+    );
+    expect(debridLinkItem?.providerAccountId).toBe(debridLinkKeys[0].id);
+    const hostLimits = await createVisualElectronApi(dense).getDebridLinkHostLimits();
+    expect(hostLimits[0]?.keyId).toBe(debridLinkKeys[0].id);
+  });
+
+  it("stores every mutable bridge state inside the visual fixture", async () => {
+    const dense = createVisualFixture("dense");
+    const api = createVisualElectronApi(dense);
+
+    await api.setTraceEnabled(true);
+    expect(dense).toHaveProperty("traceConfig.enabled", true);
+
+    await api.enableRemoteDiagnostics({
+      hostMode: "network",
+      publicHost: "capture.example.test",
+      port: 8123,
+      allowlist: ["192.0.2.10"],
+      name: "Capture Harness"
+    });
+    expect(dense).toHaveProperty("remoteDiagnostics.status.running", true);
+    expect(dense).toHaveProperty("remoteDiagnostics.status.port", 8123);
+    expect(dense).toHaveProperty("remoteDiagnostics.publicHost", "capture.example.test");
+
+    await api.disableRemoteDiagnostics();
+    expect(dense).toHaveProperty("remoteDiagnostics.status.running", false);
+  });
+
+  it("boots the dense query once and waits for both visible package names", async () => {
+    expect(typeof window).toBe("undefined");
+    const harness = createTestVisualBootstrap(
+      "?scenario=dense",
+      "Dokumentation Staffel 1",
+      (frame, rootElement) => {
+        if (frame === 3) {
+          rootElement.innerText = "Dokumentation Staffel 1 Konzertmitschnitt 2026";
+        }
+      }
+    );
+
+    await visualMain.startVisualHarness(harness.runtime);
+
+    expect(harness.clockInstalls).toHaveLength(1);
+    expect(harness.createdRootElements).toEqual([harness.rootElement]);
+    expect(harness.renderedElements).toHaveLength(1);
+    expect(harness.renderedElements[0].type).toBe(App);
+    expect(harness.renderedElements[0].type).not.toBe(React.StrictMode);
+    expect(harness.assignedApis).toHaveLength(1);
+    const snapshot = await harness.assignedApis[0].getSnapshot();
+    expect(Object.values(snapshot.session.packages).map((pkg) => pkg.name)).toEqual([
+      "Dokumentation Staffel 1",
+      "Konzertmitschnitt 2026",
+      "Archiv mit Wiederholung"
+    ]);
+    expect(harness.marker.visualScenario).toBe("dense");
+    expect(harness.markerValuesByFrame).toEqual([undefined, undefined, undefined]);
+    expect(harness.marker.visualReady).toBe("true");
+    expect(harness.rootElement.dataset.visualError).toBeUndefined();
+    expect(typeof window).toBe("undefined");
+  });
+
+  it("resolves the update query and waits for visible v9.9.9 evidence", async () => {
+    const harness = createTestVisualBootstrap(
+      "?scenario=update",
+      "Update verfügbar",
+      (frame, rootElement) => {
+        if (frame === 3) {
+          rootElement.innerText = "Update verfügbar v9.9.9";
+        }
+      }
+    );
+
+    await visualMain.startVisualHarness(harness.runtime);
+
+    expect(harness.createdRootElements).toHaveLength(1);
+    expect(harness.renderedElements).toHaveLength(1);
+    expect(harness.marker.visualScenario).toBe("update");
+    expect(harness.markerValuesByFrame).toEqual([undefined, undefined, undefined]);
+    expect(harness.marker.visualReady).toBe("true");
+    expect((await harness.assignedApis[0].checkUpdates()).latestTag).toBe("v9.9.9");
+  });
+
+  it("catches missing update evidence inside the bootstrap and exposes a local error", async () => {
+    const harness = createTestVisualBootstrap(
+      "?scenario=update",
+      "Update verfügbar",
+      () => undefined,
+      0
+    );
+    harness.marker.visualReady = "true";
+
+    await expect(visualMain.startVisualHarness(harness.runtime)).resolves.toBeUndefined();
+
+    expect(harness.createdRootElements).toHaveLength(1);
+    expect(harness.renderedElements).toHaveLength(1);
+    expect(harness.marker.visualScenario).toBe("update");
+    expect(harness.markerValuesByFrame).toEqual([undefined, undefined]);
+    expect(harness.marker.visualReady).toBeUndefined();
+    expect(harness.rootElement.dataset.visualError).toBe("true");
+    expect(harness.rootElement.textContent).toBe(
+      'Visual-Harness-Fehler: Visual-Harness-Szenario "update" ist nicht bereit: v9.9.9 fehlt'
+    );
+  });
+});

tests/visual-manifest.test.ts

@@ -0,0 +1,305 @@
+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+import { VISUAL_SCENARIOS } from "./visual/fixtures";
+import {
+  prepareVisualCapture,
+  validateVisualCaptureManifest,
+  type VisualCapture
+} from "./visual/ui-driver";
+
+const validCapture: VisualCapture = {
+  name: "region-contract",
+  scenario: "dense",
+  viewport: { width: 2560, height: 1369 },
+  activeView: "downloads",
+  interactions: [],
+  assertions: [{ type: "visible", region: "downloads-table-body" }]
+};
+
+interface FakeElementOptions {
+  role?: string;
+  name?: string;
+  region?: string;
+  className?: string;
+  visible?: boolean;
+  current?: boolean;
+}
+
+class FakeElement {
+  readonly nodeType = 1;
+  readonly tagName = "DIV";
+  readonly dataset: Record<string, string> = {};
+  readonly style = { display: "", visibility: "", opacity: "", zIndex: "auto" };
+  readonly className: string;
+  readonly role?: string;
+  readonly name?: string;
+  readonly region?: string;
+  readonly visible: boolean;
+  readonly current: boolean;
+  textContent = "content";
+  hidden = false;
+  readonly classList: { contains: (name: string) => boolean };
+
+  constructor(options: FakeElementOptions) {
+    this.role = options.role;
+    this.name = options.name;
+    this.region = options.region;
+    this.className = options.className ?? "";
+    this.visible = options.visible ?? true;
+    this.current = options.current ?? false;
+    this.classList = {
+      contains: (name: string): boolean => this.className.split(/\s+/).includes(name)
+    };
+    if (this.region) {
+      this.dataset.visualRegion = this.region;
+    }
+  }
+
+  getAttribute(name: string): string | null {
+    if (name === "role") return this.role ?? null;
+    if (name === "aria-label") return this.name ?? null;
+    if (name === "data-visual-region") return this.region ?? null;
+    if (name === "aria-hidden") return this.visible ? null : "true";
+    if (name === "aria-current" && this.current) return "page";
+    return null;
+  }
+
+  hasAttribute(name: string): boolean {
+    return name === "hidden" ? this.hidden : this.getAttribute(name) !== null;
+  }
+
+  getClientRects(): { length: number } {
+    return { length: this.visible ? 1 : 0 };
+  }
+
+  querySelectorAll(): FakeElement[] {
+    return [];
+  }
+}
+
+function createFakeDocument(
+  elements: FakeElement[],
+  navigationName = "Downloads"
+): Document {
+  const navigation = new FakeElement({
+    role: "button",
+    name: navigationName,
+    className: "tab",
+    current: true
+  });
+  Object.assign(navigation, {
+    tagName: "BUTTON",
+    click(): void {
+      return undefined;
+    },
+    focus(): void {
+      return undefined;
+    },
+    dispatchEvent(): boolean {
+      return true;
+    }
+  });
+  const all = [navigation, ...elements];
+  class FakeEvent {
+    constructor(readonly type: string) {}
+  }
+  return {
+    defaultView: {
+      Event: FakeEvent,
+      MouseEvent: FakeEvent,
+      KeyboardEvent: FakeEvent,
+      requestAnimationFrame(callback: FrameRequestCallback): number {
+        callback(0);
+        return 1;
+      },
+      getComputedStyle(element: FakeElement) {
+        return {
+          display: element.visible ? "block" : "none",
+          visibility: element.visible ? "visible" : "hidden",
+          opacity: element.visible ? "1" : "0",
+          zIndex: element.style.zIndex
+        };
+      }
+    },
+    querySelectorAll(selector: string): FakeElement[] {
+      if (selector === "[data-visual-region]") {
+        return all.filter((element) => element.region !== undefined);
+      }
+      return all;
+    },
+    querySelector(): FakeElement | null {
+      return null;
+    }
+  } as unknown as Document;
+}
+
+describe("reference capture manifest", () => {
+  const manifest = JSON.parse(readFileSync(new URL("./visual/capture-manifest.json", import.meta.url), "utf8"));
+
+  it("defines executable dense, collector, avatar, context and info captures", () => {
+    expect(VISUAL_SCENARIOS).toEqual(["empty", "dense", "update"]);
+    expect(validateVisualCaptureManifest(manifest)).toEqual([]);
+    expect(manifest.map((entry: { name: string }) => entry.name)).toEqual(expect.arrayContaining([
+      "downloads-dense",
+      "app-navigation-current",
+      "collector-dense",
+      "settings-dense",
+      "history-dense",
+      "statistics-dense",
+      "avatar-menu",
+      "avatar-update-tooltip",
+      "context-downloads",
+      "context-collector",
+      "context-settings",
+      "context-history",
+      "context-statistics",
+      "info-closed",
+      "info-open",
+      "info-absent"
+    ]));
+    const collector = manifest.find((entry: { name: string }) => entry.name === "collector-dense");
+    expect(collector.interactions).toEqual(expect.arrayContaining([
+      expect.objectContaining({ type: "fill", role: "textbox", name: "Links" })
+    ]));
+    expect(collector.assertions).toContainEqual(expect.objectContaining({
+      type: "minimum-row-count",
+      region: "collector-table-body",
+      value: 2
+    }));
+    const avatarUpdate = manifest.find((entry: { name: string }) => entry.name === "avatar-update-tooltip");
+    expect(avatarUpdate.assertions).toContainEqual({
+      type: "visible",
+      role: "button",
+      name: "Update verfügbar"
+    });
+  });
+
+  it("defines representative responsive captures before the final matrix", () => {
+    expect(manifest).toEqual(expect.arrayContaining([
+      expect.objectContaining({
+        name: "responsive-downloads-1920",
+        viewport: { width: 1920, height: 1080 }
+      }),
+      expect.objectContaining({
+        name: "responsive-collector-1366",
+        viewport: { width: 1366, height: 768 }
+      }),
+      expect.objectContaining({
+        name: "responsive-settings-1120",
+        viewport: { width: 1120, height: 760 }
+      })
+    ]));
+    const minimumSettings = manifest.find((entry: { name: string }) => entry.name === "responsive-settings-1120");
+    expect(minimumSettings.interactions.slice(0, 2)).toEqual([
+      { type: "click", role: "button", name: "Seitenleiste ausklappen" },
+      { type: "click", role: "button", name: "Accounts" }
+    ]);
+  });
+
+  it("covers every primary view at every supported viewport exactly once", () => {
+    const primaryViews = ["downloads", "collector", "settings", "history", "statistics"];
+    const supportedViewports = [
+      { width: 2560, height: 1369 },
+      { width: 1920, height: 1080 },
+      { width: 1366, height: 768 },
+      { width: 1120, height: 760 }
+    ];
+    const expectedCells = primaryViews.flatMap((activeView) =>
+      supportedViewports.map((viewport) => `${activeView}@${viewport.width}x${viewport.height}`)
+    );
+    const matrixEntries = manifest.filter((entry: {
+      name: string;
+      activeView: string;
+      viewport: { width: number; height: number };
+    }) => primaryViews.includes(entry.activeView) && supportedViewports.some((viewport) =>
+      viewport.width === entry.viewport.width && viewport.height === entry.viewport.height
+    ) && (
+      entry.name.endsWith("-dense") ||
+      entry.name.startsWith("responsive-")
+    ));
+    const actualCells = matrixEntries.map((entry: {
+      activeView: string;
+      viewport: { width: number; height: number };
+    }) => `${entry.activeView}@${entry.viewport.width}x${entry.viewport.height}`);
+
+    expect(matrixEntries).toHaveLength(20);
+    expect(new Set(matrixEntries.map((entry: { name: string }) => entry.name)).size).toBe(20);
+    expect([...actualCells].sort()).toEqual([...expectedCells].sort());
+  });
+
+  it("reports every invalid required field with its manifest path", () => {
+    expect(validateVisualCaptureManifest([{}])).toEqual([
+      "$[0].name must be a nonempty string",
+      "$[0].scenario must be one of empty, dense, update",
+      "$[0].viewport must be an object",
+      "$[0].activeView must be one of downloads, collector, settings, history, statistics",
+      "$[0].interactions must be an array",
+      "$[0].assertions must be an array"
+    ]);
+  });
+
+  it("rejects region values outside the exact marker-name pattern", () => {
+    expect(validateVisualCaptureManifest([{
+      ...validCapture,
+      assertions: [{ type: "visible", region: "Downloads_Table" }]
+    }])).toContain('$[0].assertions[0].region must match ^[a-z0-9]+(?:-[a-z0-9]+)*$');
+  });
+
+  it("does not use a same-named CSS class as a region fallback", async () => {
+    const document = createFakeDocument([
+      new FakeElement({ className: "downloads-table-body" })
+    ]);
+
+    await expect(prepareVisualCapture(validCapture, document)).rejects.toThrow(
+      'region marker "downloads-table-body" is missing'
+    );
+  });
+
+  it("resolves one visible exact region marker", async () => {
+    const document = createFakeDocument([
+      new FakeElement({ region: "downloads-table-body" }),
+      new FakeElement({ region: "downloads-table" })
+    ]);
+
+    await expect(prepareVisualCapture(validCapture, document)).resolves.toBeUndefined();
+  });
+
+  it("rejects duplicate visible exact region markers as ambiguous", async () => {
+    const document = createFakeDocument([
+      new FakeElement({ region: "downloads-table-body" }),
+      new FakeElement({ region: "downloads-table-body" })
+    ]);
+
+    await expect(prepareVisualCapture(validCapture, document)).rejects.toThrow(
+      'region marker "downloads-table-body" is ambiguous'
+    );
+  });
+
+  it("rejects duplicate region markers before evaluating absence", async () => {
+    const document = createFakeDocument([
+      new FakeElement({ region: "downloads-table-body" }),
+      new FakeElement({ region: "downloads-table-body" })
+    ]);
+    const capture: VisualCapture = {
+      ...validCapture,
+      assertions: [{ type: "absent", region: "downloads-table-body" }]
+    };
+
+    await expect(prepareVisualCapture(capture, document)).rejects.toThrow(
+      'region marker "downloads-table-body" is ambiguous'
+    );
+  });
+
+  it("selects the view tab when another button has the same accessible name", async () => {
+    const document = createFakeDocument([
+      new FakeElement({ role: "button", name: "Einstellungen", className: "menu-bar-trigger" })
+    ], "Einstellungen");
+    const capture: VisualCapture = {
+      ...validCapture,
+      activeView: "settings",
+      assertions: [{ type: "active-view", value: "settings" }]
+    };
+
+    await expect(prepareVisualCapture(capture, document)).resolves.toBeUndefined();
+  });
+});

tests/visual/capture-manifest.json

@@ -0,0 +1,414 @@
+[
+  {
+    "name": "app-navigation-current",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "history",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "history" }
+    ]
+  },
+  {
+    "name": "downloads-dense",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "downloads",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "downloads" },
+      { "type": "minimum-row-count", "region": "downloads-table-body", "value": 1 },
+      { "type": "visible", "region": "downloads-sidebar-status" },
+      { "type": "visible", "region": "downloads-pagination" }
+    ]
+  },
+  {
+    "name": "collector-dense",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "collector",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Links hinzufügen" },
+      { "type": "fill", "role": "textbox", "name": "Links", "value": "https://example.test/a\nhttps://example.test/b" },
+      { "type": "click", "role": "button", "name": "Übernehmen" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "collector" },
+      { "type": "minimum-row-count", "region": "collector-table-body", "value": 2 },
+      { "type": "absent", "region": "collector-empty-state" }
+    ]
+  },
+  {
+    "name": "settings-dense",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "settings",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Accounts" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "settings" },
+      { "type": "minimum-row-count", "region": "accounts-table-body", "value": 1 },
+      { "type": "visible", "region": "settings-sidebar" }
+    ]
+  },
+  {
+    "name": "history-dense",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "history",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "history" },
+      { "type": "minimum-row-count", "region": "history-table-body", "value": 1 },
+      { "type": "visible", "region": "history-pagination" }
+    ]
+  },
+  {
+    "name": "statistics-dense",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "statistics",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "statistics" },
+      { "type": "nonempty", "region": "statistics-kpis" },
+      { "type": "visible", "region": "statistics-chart" }
+    ]
+  },
+  {
+    "name": "avatar-menu",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "settings",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Kontomenü" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "settings" },
+      { "type": "visible", "role": "menu", "name": "Kontomenü" },
+      { "type": "nonempty", "role": "menu", "name": "Kontomenü" }
+    ]
+  },
+  {
+    "name": "avatar-update-tooltip",
+    "scenario": "update",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "settings",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Später" },
+      { "type": "wait-absent", "role": "dialog", "name": "Update installieren" },
+      { "type": "click", "role": "button", "name": "Kontomenü" },
+      { "type": "hover", "role": "button", "name": "Update verfügbar" }
+    ],
+    "assertions": [
+      { "type": "absent", "role": "dialog", "name": "Update installieren" },
+      { "type": "visible", "role": "button", "name": "Update verfügbar" },
+      { "type": "visible", "role": "menu", "name": "Kontomenü" },
+      { "type": "visible", "role": "tooltip", "name": "Update verfügbar" },
+      { "type": "layer-above", "role": "tooltip", "name": "Update verfügbar", "referenceRole": "menu", "referenceName": "Kontomenü" }
+    ]
+  },
+  {
+    "name": "context-downloads",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "downloads",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "downloads" },
+      { "type": "visible", "region": "downloads-sidebar" },
+      { "type": "visible", "region": "downloads-toolbar" },
+      { "type": "visible", "region": "downloads-pagination" }
+    ]
+  },
+  {
+    "name": "context-collector",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "collector",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "collector" },
+      { "type": "visible", "region": "collector-sidebar" },
+      { "type": "visible", "region": "collector-toolbar" },
+      { "type": "absent", "region": "downloads-toolbar" }
+    ]
+  },
+  {
+    "name": "context-settings",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "settings",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "settings" },
+      { "type": "visible", "region": "settings-sidebar" },
+      { "type": "absent", "region": "table-pagination" }
+    ]
+  },
+  {
+    "name": "context-history",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "history",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "history" },
+      { "type": "visible", "region": "history-sidebar" },
+      { "type": "visible", "region": "history-toolbar" },
+      { "type": "visible", "region": "history-pagination" }
+    ]
+  },
+  {
+    "name": "context-statistics",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "statistics",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "statistics" },
+      { "type": "visible", "region": "statistics-sidebar" },
+      { "type": "absent", "region": "downloads-toolbar" }
+    ]
+  },
+  {
+    "name": "info-closed",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "downloads",
+    "interactions": [],
+    "assertions": [
+      { "type": "visible", "role": "button", "name": "Informationen" },
+      { "type": "absent", "role": "region", "name": "Informationen zu Downloads" }
+    ]
+  },
+  {
+    "name": "info-open",
+    "scenario": "dense",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "downloads",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Informationen" }
+    ],
+    "assertions": [
+      { "type": "visible", "role": "region", "name": "Informationen zu Downloads" },
+      { "type": "nonempty", "role": "region", "name": "Informationen zu Downloads" }
+    ]
+  },
+  {
+    "name": "info-absent",
+    "scenario": "empty",
+    "viewport": { "width": 2560, "height": 1369 },
+    "activeView": "settings",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "settings" },
+      { "type": "absent", "role": "button", "name": "Informationen" }
+    ]
+  },
+  {
+    "name": "responsive-downloads-1920",
+    "scenario": "dense",
+    "viewport": { "width": 1920, "height": 1080 },
+    "activeView": "downloads",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "downloads" },
+      { "type": "minimum-row-count", "region": "downloads-table-body", "value": 1 },
+      { "type": "visible", "region": "downloads-sidebar-status" },
+      { "type": "visible", "region": "downloads-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-collector-1366",
+    "scenario": "dense",
+    "viewport": { "width": 1366, "height": 768 },
+    "activeView": "collector",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Links hinzufügen" },
+      { "type": "fill", "role": "textbox", "name": "Links", "value": "https://example.test/a\nhttps://example.test/b" },
+      { "type": "click", "role": "button", "name": "Übernehmen" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "collector" },
+      { "type": "minimum-row-count", "region": "collector-table-body", "value": 2 },
+      { "type": "absent", "region": "collector-empty-state" }
+    ]
+  },
+  {
+    "name": "responsive-settings-1120",
+    "scenario": "dense",
+    "viewport": { "width": 1120, "height": 760 },
+    "activeView": "settings",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Seitenleiste ausklappen" },
+      { "type": "click", "role": "button", "name": "Accounts" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "settings" },
+      { "type": "minimum-row-count", "region": "accounts-table-body", "value": 1 },
+      { "type": "visible", "region": "settings-sidebar" },
+      { "type": "absent", "region": "table-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-downloads-1366",
+    "scenario": "dense",
+    "viewport": { "width": 1366, "height": 768 },
+    "activeView": "downloads",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "downloads" },
+      { "type": "minimum-row-count", "region": "downloads-table-body", "value": 1 },
+      { "type": "visible", "region": "downloads-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-downloads-1120",
+    "scenario": "dense",
+    "viewport": { "width": 1120, "height": 760 },
+    "activeView": "downloads",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "downloads" },
+      { "type": "minimum-row-count", "region": "downloads-table-body", "value": 1 },
+      { "type": "visible", "region": "downloads-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-collector-1920",
+    "scenario": "dense",
+    "viewport": { "width": 1920, "height": 1080 },
+    "activeView": "collector",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Links hinzufügen" },
+      { "type": "fill", "role": "textbox", "name": "Links", "value": "https://example.test/a\nhttps://example.test/b" },
+      { "type": "click", "role": "button", "name": "Übernehmen" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "collector" },
+      { "type": "minimum-row-count", "region": "collector-table-body", "value": 2 },
+      { "type": "absent", "region": "collector-empty-state" }
+    ]
+  },
+  {
+    "name": "responsive-collector-1120",
+    "scenario": "dense",
+    "viewport": { "width": 1120, "height": 760 },
+    "activeView": "collector",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Links hinzufügen" },
+      { "type": "fill", "role": "textbox", "name": "Links", "value": "https://example.test/a\nhttps://example.test/b" },
+      { "type": "click", "role": "button", "name": "Übernehmen" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "collector" },
+      { "type": "minimum-row-count", "region": "collector-table-body", "value": 2 },
+      { "type": "absent", "region": "collector-empty-state" }
+    ]
+  },
+  {
+    "name": "responsive-settings-1920",
+    "scenario": "dense",
+    "viewport": { "width": 1920, "height": 1080 },
+    "activeView": "settings",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Accounts" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "settings" },
+      { "type": "minimum-row-count", "region": "accounts-table-body", "value": 1 },
+      { "type": "visible", "region": "settings-sidebar" },
+      { "type": "absent", "region": "table-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-settings-1366",
+    "scenario": "dense",
+    "viewport": { "width": 1366, "height": 768 },
+    "activeView": "settings",
+    "interactions": [
+      { "type": "click", "role": "button", "name": "Seitenleiste ausklappen" },
+      { "type": "click", "role": "button", "name": "Accounts" }
+    ],
+    "assertions": [
+      { "type": "active-view", "value": "settings" },
+      { "type": "minimum-row-count", "region": "accounts-table-body", "value": 1 },
+      { "type": "visible", "region": "settings-sidebar" },
+      { "type": "absent", "region": "table-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-history-1920",
+    "scenario": "dense",
+    "viewport": { "width": 1920, "height": 1080 },
+    "activeView": "history",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "history" },
+      { "type": "minimum-row-count", "region": "history-table-body", "value": 1 },
+      { "type": "visible", "region": "history-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-history-1366",
+    "scenario": "dense",
+    "viewport": { "width": 1366, "height": 768 },
+    "activeView": "history",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "history" },
+      { "type": "minimum-row-count", "region": "history-table-body", "value": 1 },
+      { "type": "visible", "region": "history-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-history-1120",
+    "scenario": "dense",
+    "viewport": { "width": 1120, "height": 760 },
+    "activeView": "history",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "history" },
+      { "type": "minimum-row-count", "region": "history-table-body", "value": 1 },
+      { "type": "visible", "region": "history-pagination" }
+    ]
+  },
+  {
+    "name": "responsive-statistics-1920",
+    "scenario": "dense",
+    "viewport": { "width": 1920, "height": 1080 },
+    "activeView": "statistics",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "statistics" },
+      { "type": "nonempty", "region": "statistics-kpis" },
+      { "type": "visible", "region": "statistics-chart" }
+    ]
+  },
+  {
+    "name": "responsive-statistics-1366",
+    "scenario": "dense",
+    "viewport": { "width": 1366, "height": 768 },
+    "activeView": "statistics",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "statistics" },
+      { "type": "nonempty", "region": "statistics-kpis" },
+      { "type": "visible", "region": "statistics-chart" }
+    ]
+  },
+  {
+    "name": "responsive-statistics-1120",
+    "scenario": "dense",
+    "viewport": { "width": 1120, "height": 760 },
+    "activeView": "statistics",
+    "interactions": [],
+    "assertions": [
+      { "type": "active-view", "value": "statistics" },
+      { "type": "nonempty", "region": "statistics-kpis" },
+      { "type": "visible", "region": "statistics-chart" }
+    ]
+  }
+]

tests/visual/driver-test.html

@@ -0,0 +1,59 @@
+<!doctype html>
+<html lang="de">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Visual Driver Test</title>
+    <style>
+      * {
+        transition: none !important;
+      }
+      body {
+        font-family: sans-serif;
+        margin: 24px;
+      }
+      nav,
+      main,
+      [role="dialog"],
+      [role="menu"],
+      [role="tooltip"] {
+        display: flex;
+        gap: 12px;
+        padding: 12px;
+      }
+      main,
+      [role="dialog"],
+      [role="menu"],
+      [role="tooltip"] {
+        flex-direction: column;
+      }
+      [role="dialog"] {
+        position: fixed;
+        inset: 80px;
+        z-index: 30;
+        background: white;
+        border: 1px solid black;
+      }
+      [role="menu"] {
+        position: fixed;
+        top: 80px;
+        right: 24px;
+        z-index: 40;
+        background: white;
+        border: 1px solid black;
+      }
+      [role="tooltip"] {
+        position: fixed;
+        top: 140px;
+        right: 24px;
+        z-index: 50;
+        background: black;
+        color: white;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/driver-test.tsx"></script>
+  </body>
+</html>

tests/visual/driver-test.tsx

@@ -0,0 +1,156 @@
+import { useState } from "react";
+import { createRoot } from "react-dom/client";
+import {
+  loadVisualCapture,
+  prepareVisualCapture,
+  type MainViewId
+} from "./ui-driver";
+
+const views: Array<{ id: MainViewId; name: string }> = [
+  { id: "downloads", name: "Downloads" },
+  { id: "collector", name: "Linksammler" },
+  { id: "settings", name: "Einstellungen" },
+  { id: "history", name: "Verlauf" },
+  { id: "statistics", name: "Statistiken" }
+];
+
+function DriverTestApp({ updateAvailable }: { updateAvailable: boolean }) {
+  const [activeView, setActiveView] = useState<MainViewId>("downloads");
+  const [collectorOpen, setCollectorOpen] = useState(false);
+  const [collectorValue, setCollectorValue] = useState("");
+  const [collectorRows, setCollectorRows] = useState<string[]>([]);
+  const [accountMenuOpen, setAccountMenuOpen] = useState(false);
+  const [updateDialogOpen, setUpdateDialogOpen] = useState(updateAvailable);
+  const [updateTooltipOpen, setUpdateTooltipOpen] = useState(false);
+  const [infoOpen, setInfoOpen] = useState(false);
+
+  return (
+    <>
+      <nav aria-label="Hauptnavigation">
+        {views.map((view) => (
+          <button
+            key={view.id}
+            type="button"
+            aria-current={activeView === view.id ? "page" : undefined}
+            onClick={() => setActiveView(view.id)}
+          >
+            {view.name}
+          </button>
+        ))}
+      </nav>
+      <main data-visual-active-view={activeView}>
+        {activeView === "downloads" && (
+          <>
+            <div data-visual-region="downloads-sidebar">Download-Seitenleiste</div>
+            <div data-visual-region="downloads-sidebar-status">3 Pakete aktiv</div>
+            <div data-visual-region="downloads-toolbar">Download-Werkzeuge</div>
+            <div data-visual-region="downloads-table-body">
+              <div role="row">Dokumentation Staffel 1</div>
+            </div>
+            <div data-visual-region="downloads-pagination">Seite 1 von 1</div>
+            <button type="button" onClick={() => setInfoOpen((open) => !open)}>Informationen</button>
+            {infoOpen && <section aria-label="Informationen zu Downloads">Drei Downloads sind sichtbar.</section>}
+          </>
+        )}
+        {activeView === "collector" && (
+          <>
+            <div data-visual-region="collector-sidebar">Linksammler-Seitenleiste</div>
+            <div data-visual-region="collector-toolbar">Linksammler-Werkzeuge</div>
+            <button type="button" onClick={() => setCollectorOpen(true)}>Links hinzufügen</button>
+            {collectorRows.length === 0 && <div data-visual-region="collector-empty-state">Keine Links</div>}
+            <div data-visual-region="collector-table-body">
+              {collectorRows.map((link) => <div role="row" key={link}>{link}</div>)}
+            </div>
+          </>
+        )}
+        {activeView === "settings" && (
+          <>
+            <div data-visual-region="settings-sidebar">Einstellungs-Seitenleiste</div>
+            <button type="button">Accounts</button>
+            <div data-visual-region="accounts-table-body"><div role="row">Visual Account</div></div>
+            <button
+              type="button"
+              disabled={updateDialogOpen}
+              onClick={() => setAccountMenuOpen((open) => !open)}
+            >
+              Kontomenü
+            </button>
+          </>
+        )}
+        {activeView === "history" && (
+          <>
+            <div data-visual-region="history-sidebar">Verlauf-Seitenleiste</div>
+            <div data-visual-region="history-toolbar">Verlauf-Werkzeuge</div>
+            <div data-visual-region="history-table-body"><div role="row">Naturfilm Sammlung</div></div>
+            <div data-visual-region="history-pagination">Seite 1 von 1</div>
+          </>
+        )}
+        {activeView === "statistics" && (
+          <>
+            <div data-visual-region="statistics-sidebar">Statistik-Seitenleiste</div>
+            <div data-visual-region="statistics-kpis">919,82 GB</div>
+            <div data-visual-region="statistics-chart">Download-Verlauf</div>
+          </>
+        )}
+      </main>
+      {collectorOpen && (
+        <div role="dialog" aria-label="Links hinzufügen">
+          <textarea aria-label="Links" value={collectorValue} onChange={(event) => setCollectorValue(event.target.value)} />
+          <button
+            type="button"
+            onClick={() => {
+              setCollectorRows(collectorValue.split(/\r?\n/).map((value) => value.trim()).filter(Boolean));
+              setCollectorOpen(false);
+            }}
+          >
+            Übernehmen
+          </button>
+        </div>
+      )}
+      {updateDialogOpen && (
+        <div role="dialog" aria-label="Update installieren">
+          <strong>Update installieren</strong>
+          <button type="button" onClick={() => setUpdateDialogOpen(false)}>Später</button>
+        </div>
+      )}
+      {accountMenuOpen && (
+        <div role="menu" aria-label="Kontomenü">
+          <button
+            type="button"
+            aria-label="Update verfügbar"
+            onMouseEnter={() => setUpdateTooltipOpen(true)}
+            onFocus={() => setUpdateTooltipOpen(true)}
+          >
+            Update verfügbar
+          </button>
+        </div>
+      )}
+      {updateTooltipOpen && <div role="tooltip" aria-label="Update verfügbar">Version 9.9.9 verfügbar</div>}
+    </>
+  );
+}
+
+async function startDriverTest(): Promise<void> {
+  const rootElement = document.getElementById("root");
+  if (!rootElement) {
+    throw new Error("Root element fehlt");
+  }
+  const captureName = new URLSearchParams(window.location.search).get("capture");
+  if (!captureName) {
+    throw new Error("Capture fehlt");
+  }
+  try {
+    const capture = await loadVisualCapture(captureName);
+    createRoot(rootElement).render(<DriverTestApp updateAvailable={capture.scenario === "update"} />);
+    await new Promise<void>((resolve) => requestAnimationFrame(() => requestAnimationFrame(() => resolve())));
+    await prepareVisualCapture(capture, document);
+    await new Promise<void>((resolve) => requestAnimationFrame(() => requestAnimationFrame(() => resolve())));
+    document.documentElement.dataset.visualReady = "true";
+  } catch (error) {
+    delete document.documentElement.dataset.visualReady;
+    rootElement.dataset.visualError = "true";
+    rootElement.textContent = `Visual-Harness-Fehler: ${error instanceof Error ? error.message : String(error)}`;
+  }
+}
+
+void startDriverTest();

tests/visual/fixtures.ts

@@ -0,0 +1,585 @@
+import type {
+  AppSettings,
+  HistoryEntry,
+  RemoteDiagnosticsInfo,
+  SupportTraceConfig,
+  UiSnapshot,
+  UpdateCheckResult
+} from "../../src/shared/types";
+import { parseDebridLinkApiKeys } from "../../src/shared/debrid-link-keys";
+import { getMegaDebridAccountId } from "../../src/shared/mega-debrid-accounts";
+
+export const VISUAL_SCENARIOS = ["empty", "dense", "update"] as const;
+
+export type VisualScenario = (typeof VISUAL_SCENARIOS)[number];
+
+export interface VisualFixture {
+  snapshot: UiSnapshot;
+  history: HistoryEntry[];
+  update: UpdateCheckResult;
+  traceConfig: SupportTraceConfig;
+  remoteDiagnostics: RemoteDiagnosticsInfo;
+}
+
+export interface VisualClockTarget {
+  setInterval: (handler: TimerHandler, timeout?: number, ...arguments_: unknown[]) => number;
+}
+
+export const VISUAL_NOW_MS = 1786312800000;
+
+export function installVisualClock(target: VisualClockTarget): () => void {
+  const originalDateNow = Date.now;
+  const originalSetInterval = target.setInterval;
+  Date.now = () => VISUAL_NOW_MS;
+  target.setInterval = () => 0;
+  return () => {
+    Date.now = originalDateNow;
+    target.setInterval = originalSetInterval;
+  };
+}
+
+export async function waitForVisualFrames(
+  requestFrame: (callback: FrameRequestCallback) => number
+): Promise<void> {
+  const waitForFrame = (): Promise<void> => new Promise((resolve) => {
+    requestFrame(() => resolve());
+  });
+  await waitForFrame();
+  await waitForFrame();
+}
+
+function createSettings(): AppSettings {
+  const megaLogin = "visual@example.test";
+  const debridLinkApiKeys = "visual-debrid-link-key-1\nvisual-debrid-link-key-2";
+  const megaAccountId = getMegaDebridAccountId(megaLogin);
+  const debridLinkKeys = parseDebridLinkApiKeys(debridLinkApiKeys);
+  return {
+    token: "visual-real-debrid-token",
+    realDebridUseWebLogin: false,
+    megaLogin,
+    megaPassword: "visual-password",
+    megaCredentials: `${megaLogin}:visual-password`,
+    megaDebridApiEnabled: true,
+    megaDebridWebEnabled: true,
+    megaDebridPreferApi: true,
+    bestToken: "visual-best-debrid-token",
+    bestDebridUseWebLogin: false,
+    allDebridToken: "visual-all-debrid-token",
+    allDebridUseWebLogin: false,
+    ddownloadLogin: "visual-ddownload",
+    ddownloadPassword: "visual-password",
+    oneFichierApiKey: "visual-onefichier-key",
+    debridLinkApiKeys,
+    debridLinkDisabledKeyIds: [],
+    linkSnappyLogin: "visual-linksnappy",
+    linkSnappyPassword: "visual-password",
+    archivePasswordList: "visual-archive-password",
+    rememberToken: true,
+    providerOrder: ["realdebrid", "megadebrid-api", "bestdebrid", "alldebrid", "debridlink"],
+    providerPrimary: "realdebrid",
+    providerSecondary: "megadebrid-api",
+    providerTertiary: "bestdebrid",
+    autoProviderFallback: true,
+    outputDir: "C:\\Visual\\Downloads",
+    packageName: "",
+    autoExtract: true,
+    autoRename4sf4sj: true,
+    keepGermanAudioOnly: false,
+    germanAudioMode: "tag",
+    extractDir: "C:\\Visual\\Extracted",
+    collectMkvToLibrary: true,
+    mkvLibraryDir: "C:\\Visual\\Library",
+    createExtractSubfolder: true,
+    hybridExtract: true,
+    cleanupMode: "none",
+    extractConflictMode: "overwrite",
+    removeLinkFilesAfterExtract: true,
+    removeSamplesAfterExtract: true,
+    enableIntegrityCheck: true,
+    autoResumeOnStart: true,
+    autoReconnect: true,
+    reconnectWaitSeconds: 45,
+    completedCleanupPolicy: "never",
+    maxParallel: 4,
+    maxParallelExtract: 2,
+    retryLimit: 3,
+    speedLimitEnabled: false,
+    speedLimitKbps: 0,
+    speedLimitMode: "global",
+    updateRepo: "Sucukdeluxe/multi-debrid-downloader",
+    autoUpdateCheck: true,
+    clipboardWatch: true,
+    minimizeToTray: false,
+    theme: "dark",
+    collapseNewPackages: false,
+    historyRetentionMode: "permanent",
+    historyMaxEntries: 500,
+    historyMaxAgeDays: 0,
+    accountListShowDetailedDebridLinkKeys: true,
+    autoSortPackagesByProgress: false,
+    autoSkipExtracted: false,
+    hideExtractedItems: false,
+    confirmDeleteSelection: true,
+    backupIncludeDownloads: false,
+    backupIncludeRemoteDiagnostics: false,
+    notifyUrl: "https://example.test/visual-webhook",
+    notifyMention: "@visual",
+    notifyOnPackageCompleted: true,
+    notifyOnPackageFailed: true,
+    notifyOnRunFinished: true,
+    totalDownloadedAllTime: 987654321000,
+    totalCompletedFilesAllTime: 842,
+    totalRuntimeAllTimeMs: 172800000,
+    bandwidthSchedules: [
+      {
+        id: "visual-schedule-night",
+        startHour: 22,
+        endHour: 6,
+        speedLimitKbps: 12288,
+        enabled: true
+      }
+    ],
+    columnOrder: ["name", "size", "progress", "hoster", "account", "prio", "status", "speed"],
+    extractCpuPriority: "middle",
+    autoExtractWhenStopped: true,
+    disabledProviders: ["onefichier"],
+    hosterRouting: {
+      "rapidgator.net": "realdebrid",
+      "ddownload.com": "debridlink"
+    },
+    providerDailyLimitBytes: {
+      realdebrid: 1099511627776,
+      debridlink: 536870912000
+    },
+    providerDailyUsageBytes: {
+      realdebrid: 214748364800,
+      debridlink: 107374182400
+    },
+    providerTotalUsageBytes: {
+      realdebrid: 8796093022208,
+      debridlink: 2199023255552
+    },
+    debridLinkApiKeyDailyLimitBytes: {
+      [debridLinkKeys[0].id]: 268435456000,
+      [debridLinkKeys[1].id]: 268435456000
+    },
+    debridLinkApiKeyDailyUsageBytes: {
+      [debridLinkKeys[0].id]: 53687091200,
+      [debridLinkKeys[1].id]: 26843545600
+    },
+    debridLinkApiKeyTotalUsageBytes: {
+      [debridLinkKeys[0].id]: 1099511627776,
+      [debridLinkKeys[1].id]: 549755813888
+    },
+    megaDebridDisabledAccountIds: [],
+    megaDebridAccountDailyLimitBytes: {
+      [megaAccountId]: 322122547200
+    },
+    megaDebridAccountDailyUsageBytes: {
+      [megaAccountId]: 64424509440
+    },
+    megaDebridAccountTotalUsageBytes: {
+      [megaAccountId]: 1649267441664
+    },
+    debridAccountStatuses: {
+      [megaAccountId]: {
+        accountId: megaAccountId,
+        provider: "megadebrid",
+        label: "Mega-Debrid Hauptkonto",
+        maskedLogin: "v***@example.test",
+        valid: true,
+        isPremium: true,
+        premiumUntilMs: 1798761600000,
+        email: "visual@example.test",
+        message: "Premium aktiv",
+        checkedAt: 1786312800000
+      },
+      [debridLinkKeys[0].id]: {
+        accountId: debridLinkKeys[0].id,
+        provider: "debridlink",
+        label: "Debrid-Link Key 1",
+        maskedLogin: debridLinkKeys[0].masked,
+        valid: true,
+        isPremium: true,
+        premiumUntilMs: null,
+        message: "API-Key aktiv",
+        checkedAt: 1786312800000
+      },
+      [debridLinkKeys[1].id]: {
+        accountId: debridLinkKeys[1].id,
+        provider: "debridlink",
+        label: "Debrid-Link Key 2",
+        maskedLogin: debridLinkKeys[1].masked,
+        valid: true,
+        isPremium: true,
+        premiumUntilMs: null,
+        message: "API-Key aktiv",
+        checkedAt: 1786312800000
+      }
+    },
+    providerDailyUsageDay: "2026-08-10",
+    scheduledStartEpochMs: 0
+  };
+}
+
+function createEmptySnapshot(): UiSnapshot {
+  return {
+    settings: createSettings(),
+    session: {
+      version: 1,
+      packageOrder: [],
+      packages: {},
+      items: {},
+      runStartedAt: 0,
+      totalDownloadedBytes: 0,
+      summaryText: "Keine Downloads in der Warteschlange",
+      reconnectUntil: 0,
+      reconnectReason: "",
+      paused: false,
+      running: false,
+      updatedAt: 1786312800000
+    },
+    summary: null,
+    stats: {
+      totalDownloaded: 0,
+      totalDownloadedAllTime: 987654321000,
+      totalFiles: 0,
+      totalFilesSession: 0,
+      totalFilesAllTime: 842,
+      totalPackages: 0,
+      sessionStartedAt: 1786309200000,
+      appSessionStartedAt: 1786309200000,
+      sessionRuntimeMs: 3600000,
+      totalRuntimeMs: 172800000,
+      runtimeMeasuredAt: 1786312800000
+    },
+    speedText: "0 B/s",
+    etaText: "--:--",
+    canStart: false,
+    canStop: false,
+    canPause: false,
+    clipboardActive: true,
+    reconnectSeconds: 0,
+    packageSpeedBps: {},
+    payloadKind: "full",
+    removedItemIds: [],
+    removedPackageIds: [],
+    rotationEvents: []
+  };
+}
+
+function createDenseSnapshot(): UiSnapshot {
+  const snapshot = createEmptySnapshot();
+  const debridLinkKeys = parseDebridLinkApiKeys(snapshot.settings.debridLinkApiKeys);
+  snapshot.session = {
+    version: 1,
+    packageOrder: ["visual-package-active", "visual-package-complete", "visual-package-failed"],
+    packages: {
+      "visual-package-active": {
+        id: "visual-package-active",
+        name: "Dokumentation Staffel 1",
+        outputDir: "C:\\Visual\\Downloads\\Dokumentation Staffel 1",
+        extractDir: "C:\\Visual\\Extracted\\Dokumentation Staffel 1",
+        status: "downloading",
+        itemIds: ["visual-item-active-1", "visual-item-active-2"],
+        cancelled: false,
+        enabled: true,
+        priority: "high",
+        postProcessLabel: "Automatisch entpacken",
+        downloadStartedAt: 1786311000000,
+        createdAt: 1786310400000,
+        updatedAt: 1786312800000
+      },
+      "visual-package-complete": {
+        id: "visual-package-complete",
+        name: "Konzertmitschnitt 2026",
+        outputDir: "C:\\Visual\\Downloads\\Konzertmitschnitt 2026",
+        extractDir: "C:\\Visual\\Extracted\\Konzertmitschnitt 2026",
+        status: "completed",
+        itemIds: ["visual-item-complete-1"],
+        cancelled: false,
+        enabled: true,
+        priority: "normal",
+        postProcessLabel: "Entpackt",
+        downloadStartedAt: 1786307400000,
+        downloadCompletedAt: 1786309200000,
+        createdAt: 1786306800000,
+        updatedAt: 1786309200000
+      },
+      "visual-package-failed": {
+        id: "visual-package-failed",
+        name: "Archiv mit Wiederholung",
+        outputDir: "C:\\Visual\\Downloads\\Archiv mit Wiederholung",
+        extractDir: "C:\\Visual\\Extracted\\Archiv mit Wiederholung",
+        status: "failed",
+        itemIds: ["visual-item-failed-1"],
+        cancelled: false,
+        enabled: true,
+        priority: "low",
+        postProcessLabel: "Wartet auf Wiederholung",
+        downloadStartedAt: 1786310100000,
+        createdAt: 1786309800000,
+        updatedAt: 1786312500000
+      }
+    },
+    items: {
+      "visual-item-active-1": {
+        id: "visual-item-active-1",
+        packageId: "visual-package-active",
+        url: "https://rapidgator.net/file/visual-active-1",
+        provider: "realdebrid",
+        providerLabel: "Real-Debrid",
+        providerAccountId: "visual-rd-account",
+        providerAccountLabel: "Real-Debrid Hauptkonto",
+        status: "downloading",
+        retries: 0,
+        speedBps: 12582912,
+        downloadedBytes: 3221225472,
+        totalBytes: 8589934592,
+        progressPercent: 37.5,
+        fileName: "dokumentation.s01e01.2160p.mkv",
+        targetPath: "C:\\Visual\\Downloads\\Dokumentation Staffel 1\\dokumentation.s01e01.2160p.mkv",
+        resumable: true,
+        attempts: 1,
+        lastError: "",
+        fullStatus: "Download läuft",
+        createdAt: 1786310400000,
+        updatedAt: 1786312800000,
+        onlineStatus: "online"
+      },
+      "visual-item-active-2": {
+        id: "visual-item-active-2",
+        packageId: "visual-package-active",
+        url: "https://ddownload.com/visual-active-2",
+        provider: "debridlink",
+        providerLabel: "Debrid-Link",
+        providerAccountId: debridLinkKeys[0].id,
+        providerAccountLabel: "Debrid-Link Key 1",
+        status: "queued",
+        retries: 0,
+        speedBps: 0,
+        downloadedBytes: 0,
+        totalBytes: 7516192768,
+        progressPercent: 0,
+        fileName: "dokumentation.s01e02.2160p.mkv",
+        targetPath: "C:\\Visual\\Downloads\\Dokumentation Staffel 1\\dokumentation.s01e02.2160p.mkv",
+        resumable: true,
+        attempts: 0,
+        lastError: "",
+        fullStatus: "In Warteschlange",
+        createdAt: 1786310460000,
+        updatedAt: 1786312800000,
+        onlineStatus: "online"
+      },
+      "visual-item-complete-1": {
+        id: "visual-item-complete-1",
+        packageId: "visual-package-complete",
+        url: "https://rapidgator.net/file/visual-complete-1",
+        provider: "realdebrid",
+        providerLabel: "Real-Debrid",
+        providerAccountId: "visual-rd-account",
+        providerAccountLabel: "Real-Debrid Hauptkonto",
+        status: "completed",
+        retries: 0,
+        speedBps: 0,
+        downloadedBytes: 12884901888,
+        totalBytes: 12884901888,
+        progressPercent: 100,
+        fileName: "konzertmitschnitt.2026.mkv",
+        targetPath: "C:\\Visual\\Downloads\\Konzertmitschnitt 2026\\konzertmitschnitt.2026.mkv",
+        resumable: true,
+        attempts: 1,
+        lastError: "",
+        fullStatus: "Abgeschlossen",
+        createdAt: 1786306800000,
+        updatedAt: 1786309200000,
+        onlineStatus: "online"
+      },
+      "visual-item-failed-1": {
+        id: "visual-item-failed-1",
+        packageId: "visual-package-failed",
+        url: "https://example.test/offline/visual-failed-1",
+        provider: "bestdebrid",
+        providerLabel: "BestDebrid",
+        providerAccountId: "visual-best-account",
+        providerAccountLabel: "BestDebrid Hauptkonto",
+        status: "failed",
+        retries: 3,
+        speedBps: 0,
+        downloadedBytes: 536870912,
+        totalBytes: 4294967296,
+        progressPercent: 12.5,
+        fileName: "archiv.part01.rar",
+        targetPath: "C:\\Visual\\Downloads\\Archiv mit Wiederholung\\archiv.part01.rar",
+        resumable: false,
+        attempts: 4,
+        lastError: "Hoster vorübergehend nicht verfügbar",
+        fullStatus: "Fehlgeschlagen nach 4 Versuchen",
+        createdAt: 1786309800000,
+        updatedAt: 1786312500000,
+        onlineStatus: "offline"
+      }
+    },
+    runStartedAt: 1786311000000,
+    totalDownloadedBytes: 16642998272,
+    summaryText: "1 aktiv, 1 wartet, 1 abgeschlossen, 1 fehlgeschlagen",
+    reconnectUntil: 0,
+    reconnectReason: "",
+    paused: false,
+    running: true,
+    updatedAt: 1786312800000
+  };
+  snapshot.summary = {
+    total: 4,
+    success: 1,
+    failed: 1,
+    cancelled: 0,
+    extracted: 1,
+    durationSeconds: 5400,
+    averageSpeedBps: 9437184
+  };
+  snapshot.stats = {
+    totalDownloaded: 16642998272,
+    totalDownloadedAllTime: 987654321000,
+    totalFiles: 4,
+    totalFilesSession: 4,
+    totalFilesAllTime: 842,
+    totalPackages: 3,
+    sessionStartedAt: 1786309200000,
+    appSessionStartedAt: 1786309200000,
+    sessionRuntimeMs: 3600000,
+    totalRuntimeMs: 172800000,
+    runtimeMeasuredAt: 1786312800000
+  };
+  snapshot.speedText = "12,0 MB/s";
+  snapshot.etaText = "00:17:24";
+  snapshot.canStart = true;
+  snapshot.canStop = true;
+  snapshot.canPause = true;
+  snapshot.packageSpeedBps = {
+    "visual-package-active": 12582912,
+    "visual-package-complete": 0,
+    "visual-package-failed": 0
+  };
+  snapshot.rotationEvents = [
+    {
+      id: "visual-rotation-event-1",
+      at: 1786312200000,
+      level: "WARN",
+      provider: "Debrid-Link",
+      accountLabel: "Debrid-Link Key 2",
+      event: "Account gewechselt",
+      reason: "Tageslimit erreicht",
+      category: "quota",
+      cooldownSec: 3600,
+      next: "Debrid-Link Key 1"
+    }
+  ];
+  return snapshot;
+}
+
+function createDenseHistory(): HistoryEntry[] {
+  return [
+    {
+      id: "visual-history-1",
+      name: "Naturfilm Sammlung",
+      totalBytes: 25769803776,
+      downloadedBytes: 25769803776,
+      fileCount: 6,
+      provider: "realdebrid",
+      completedAt: 1786226400000,
+      durationSeconds: 1842,
+      status: "completed",
+      outputDir: "C:\\Visual\\Downloads\\Naturfilm Sammlung",
+      urls: [
+        "https://rapidgator.net/file/visual-history-1a",
+        "https://rapidgator.net/file/visual-history-1b"
+      ]
+    },
+    {
+      id: "visual-history-2",
+      name: "Gelöschtes Testpaket",
+      totalBytes: 4294967296,
+      downloadedBytes: 4294967296,
+      fileCount: 1,
+      provider: "debridlink",
+      completedAt: 1786140000000,
+      durationSeconds: 722,
+      status: "deleted",
+      outputDir: "C:\\Visual\\Downloads\\Gelöschtes Testpaket",
+      urls: ["https://ddownload.com/visual-history-2"]
+    }
+  ];
+}
+
+function createUpdate(updateAvailable: boolean): UpdateCheckResult {
+  return updateAvailable
+    ? {
+        updateAvailable: true,
+        currentVersion: "2.0.12",
+        latestVersion: "9.9.9",
+        latestTag: "v9.9.9",
+        releaseUrl: "https://github.com/Sucukdeluxe/multi-debrid-downloader/releases/tag/v9.9.9",
+        setupAssetUrl: "https://example.test/Multi-Debrid-Downloader-Setup-9.9.9.exe",
+        setupAssetName: "Multi-Debrid-Downloader-Setup-9.9.9.exe",
+        setupAssetDigest: "sha256:1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
+        releaseNotes: "Neue kompakte Desktop-Oberfläche\nVerbesserte Accountübersicht\nPräzisere Statusanzeigen"
+      }
+    : {
+        updateAvailable: false,
+        currentVersion: "2.0.12",
+        latestVersion: "2.0.12",
+        latestTag: "v2.0.12",
+        releaseUrl: "https://github.com/Sucukdeluxe/multi-debrid-downloader/releases/tag/v2.0.12",
+        releaseNotes: "Aktuelle Version"
+      };
+}
+
+function createTraceConfig(): SupportTraceConfig {
+  return {
+    enabled: false,
+    includeMainLog: true,
+    includeAudit: true,
+    logDebugRequests: false,
+    autoDisableAt: null,
+    updatedAt: "2026-08-10T12:00:00.000Z"
+  };
+}
+
+function createRemoteDiagnostics(): RemoteDiagnosticsInfo {
+  return {
+    status: {
+      running: false,
+      host: "127.0.0.1",
+      port: 7843,
+      hasToken: true,
+      localOnly: true,
+      allowlistCount: 1
+    },
+    code: "VISUAL-CODE",
+    publicHost: "visual.example.test",
+    name: "Visual Harness",
+    allowlist: ["127.0.0.1"],
+    suggestedHosts: ["visual.example.test"]
+  };
+}
+
+export function createVisualFixture(scenario: VisualScenario): VisualFixture {
+  if (scenario === "empty") {
+    return {
+      snapshot: createEmptySnapshot(),
+      history: [],
+      update: createUpdate(false),
+      traceConfig: createTraceConfig(),
+      remoteDiagnostics: createRemoteDiagnostics()
+    };
+  }
+
+  return {
+    snapshot: createDenseSnapshot(),
+    history: createDenseHistory(),
+    update: createUpdate(scenario === "update"),
+    traceConfig: createTraceConfig(),
+    remoteDiagnostics: createRemoteDiagnostics()
+  };
+}

tests/visual/index.html

@@ -0,0 +1,21 @@
+<!doctype html>
+<html lang="de">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Multi Debrid Downloader Visual Harness</title>
+    <style>
+      *,
+      *::before,
+      *::after {
+        animation: none !important;
+        caret-color: transparent !important;
+        transition: none !important;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/main.tsx"></script>
+  </body>
+</html>

tests/visual/main.tsx

@@ -0,0 +1,189 @@
+import type { ReactElement } from "react";
+import { createRoot } from "react-dom/client";
+import { App } from "../../src/renderer/App";
+import type { ElectronApi } from "../../src/shared/preload-api";
+import "../../src/renderer/theme.css";
+import "../../src/renderer/styles.css";
+import {
+  createVisualFixture,
+  installVisualClock,
+  waitForVisualFrames,
+  type VisualScenario
+} from "./fixtures";
+import { createVisualElectronApi } from "./mock-electron-api";
+import { loadVisualCapture, prepareVisualCapture } from "./ui-driver";
+
+interface VisualHarnessRoot {
+  readonly innerText: string;
+  textContent: string | null;
+  readonly dataset: {
+    visualError?: string;
+  };
+}
+
+interface VisualReadyMarker {
+  visualReady?: string;
+  visualScenario?: string;
+}
+
+interface VisualReadyOptions {
+  marker: VisualReadyMarker;
+  loadVisualState: () => Promise<void>;
+  requestFrame: (callback: FrameRequestCallback) => number;
+  maxFrames?: number;
+}
+
+interface VisualRenderRoot {
+  render: (element: ReactElement) => void;
+}
+
+export interface VisualHarnessRuntime {
+  readonly search: string;
+  readonly rootElement: VisualHarnessRoot | null;
+  readonly marker: VisualReadyMarker;
+  readonly requestFrame: (callback: FrameRequestCallback) => number;
+  readonly maxFrames?: number;
+  installClock: () => void;
+  setElectronApi: (api: ElectronApi) => void;
+  createRoot: (rootElement: VisualHarnessRoot) => VisualRenderRoot;
+}
+
+const visibleScenarioContent = {
+  empty: ["Noch keine Downloads"],
+  dense: ["Dokumentation Staffel 1", "Konzertmitschnitt 2026"],
+  update: ["v9.9.9"]
+} satisfies Record<VisualScenario, readonly string[]>;
+
+function readScenario(search: string): VisualScenario {
+  const scenario = new URLSearchParams(search).get("scenario");
+  return scenario === "empty" || scenario === "update" ? scenario : "dense";
+}
+
+function missingVisibleContent(scenario: VisualScenario, rootElement: VisualHarnessRoot): string[] {
+  return visibleScenarioContent[scenario].filter((expected) => !rootElement.innerText.includes(expected));
+}
+
+function waitForVisualFrame(
+  requestFrame: (callback: FrameRequestCallback) => number
+): Promise<void> {
+  return new Promise((resolve) => {
+    requestFrame(() => resolve());
+  });
+}
+
+export function renderVisualApp(render: (element: ReactElement) => void): void {
+  render(<App />);
+}
+
+export async function markVisualReady(
+  scenario: VisualScenario,
+  rootElement: VisualHarnessRoot,
+  options: VisualReadyOptions
+): Promise<void> {
+  delete options.marker.visualReady;
+  delete rootElement.dataset.visualError;
+  await options.loadVisualState();
+  await waitForVisualFrames(options.requestFrame);
+  const maxFrames = options.maxFrames ?? 180;
+
+  for (let frame = 0; frame <= maxFrames; frame += 1) {
+    const missing = missingVisibleContent(scenario, rootElement);
+    if (missing.length === 0) {
+      options.marker.visualReady = "true";
+      return;
+    }
+    if (frame < maxFrames) {
+      await waitForVisualFrame(options.requestFrame);
+    }
+  }
+
+  const missing = missingVisibleContent(scenario, rootElement);
+  throw new Error(
+    `Visual-Harness-Szenario "${scenario}" ist nicht bereit: ${missing.map((value) => `${value} fehlt`).join(", ")}`
+  );
+}
+
+export function showVisualHarnessError(
+  rootElement: VisualHarnessRoot,
+  marker: VisualReadyMarker,
+  error: unknown
+): void {
+  delete marker.visualReady;
+  rootElement.dataset.visualError = "true";
+  rootElement.textContent = `Visual-Harness-Fehler: ${error instanceof Error ? error.message : String(error)}`;
+}
+
+function createBrowserVisualHarnessRuntime(): VisualHarnessRuntime {
+  const rootElement = document.getElementById("root");
+  return {
+    search: window.location.search,
+    rootElement,
+    marker: document.documentElement.dataset,
+    requestFrame: window.requestAnimationFrame.bind(window),
+    installClock(): void {
+      installVisualClock(window);
+    },
+    setElectronApi(api: ElectronApi): void {
+      window.rd = api;
+    },
+    createRoot(element: VisualHarnessRoot): VisualRenderRoot {
+      if (rootElement === null || element !== rootElement) {
+        throw new Error("Root element fehlt");
+      }
+      return createRoot(rootElement);
+    }
+  };
+}
+
+export async function startVisualHarness(
+  runtime: VisualHarnessRuntime = createBrowserVisualHarnessRuntime()
+): Promise<void> {
+  const rootElement = runtime.rootElement;
+  if (!rootElement) {
+    throw new Error("Root element fehlt");
+  }
+
+  try {
+    const captureName = new URLSearchParams(runtime.search).get("capture");
+    const capture = captureName ? await loadVisualCapture(captureName) : undefined;
+    const scenario = capture?.scenario ?? readScenario(runtime.search);
+    runtime.installClock();
+    const fixture = createVisualFixture(scenario);
+    const api = createVisualElectronApi(fixture);
+    runtime.setElectronApi(api);
+    runtime.marker.visualScenario = scenario;
+
+    const root = runtime.createRoot(rootElement);
+    renderVisualApp((element) => root.render(element));
+
+    const readyOptions = {
+      loadVisualState: async () => {
+        await Promise.all([api.getSnapshot(), api.getHistory()]);
+      },
+      requestFrame: runtime.requestFrame,
+      maxFrames: runtime.maxFrames
+    };
+
+    if (!capture) {
+      await markVisualReady(scenario, rootElement, {
+        marker: runtime.marker,
+        ...readyOptions
+      });
+      return;
+    }
+
+    delete runtime.marker.visualReady;
+    await markVisualReady(scenario, rootElement, {
+      marker: {},
+      ...readyOptions
+    });
+    await prepareVisualCapture(capture, document);
+    runtime.marker.visualReady = "true";
+  } catch (error) {
+    showVisualHarnessError(rootElement, runtime.marker, error);
+  }
+}
+
+if (typeof window !== "undefined" && typeof document !== "undefined") {
+  startVisualHarness();
+}

tests/visual/mock-electron-api.ts

@@ -0,0 +1,405 @@
+import type { ElectronApi } from "../../src/shared/preload-api";
+import type { AppSettings, HistoryEntry } from "../../src/shared/types";
+import { parseDebridLinkApiKeys } from "../../src/shared/debrid-link-keys";
+import type { VisualFixture } from "./fixtures";
+
+const stableNoopUnsubscribe = (): void => {};
+
+function clone<T>(value: T): T {
+  return structuredClone(value);
+}
+
+export function createVisualElectronApi(
+  fixture: VisualFixture,
+  search = typeof window === "undefined" ? "" : window.location.search
+): ElectronApi {
+  const historyState = new URLSearchParams(search).get("history-state");
+  let historyRequestCount = 0;
+  const updateSettings = (settings: Partial<AppSettings>): AppSettings => {
+    Object.assign(fixture.snapshot.settings, settings);
+    return clone(fixture.snapshot.settings);
+  };
+
+  return {
+    getSnapshot: async () => clone(fixture.snapshot),
+    getVersion: async () => "2.0.12",
+    checkUpdates: async () => clone(fixture.update),
+    installUpdate: async () => ({ started: true, message: "Visual update gestartet" }),
+    openExternal: async () => true,
+    updateSettings: async (settings) => updateSettings(settings),
+    resetProviderDailyUsage: async (provider) => {
+      fixture.snapshot.settings.providerDailyUsageBytes[provider] = 0;
+      return clone(fixture.snapshot.settings);
+    },
+    resetDebridLinkApiKeyDailyUsage: async (keyId) => {
+      fixture.snapshot.settings.debridLinkApiKeyDailyUsageBytes[keyId] = 0;
+      return clone(fixture.snapshot.settings);
+    },
+    addLinks: async () => ({ addedPackages: 0, addedLinks: 0, invalidCount: 0 }),
+    addContainers: async () => ({ addedPackages: 0, addedLinks: 0 }),
+    getStartConflicts: async () => [],
+    resolveStartConflict: async (_packageId, policy) => ({
+      skipped: policy === "skip",
+      overwritten: policy === "overwrite"
+    }),
+    clearAll: async () => {
+      fixture.snapshot.session.packageOrder = [];
+      fixture.snapshot.session.packages = {};
+      fixture.snapshot.session.items = {};
+      fixture.snapshot.session.running = false;
+      fixture.snapshot.session.paused = false;
+      fixture.snapshot.session.totalDownloadedBytes = 0;
+      fixture.snapshot.packageSpeedBps = {};
+      fixture.snapshot.canStart = false;
+      fixture.snapshot.canStop = false;
+      fixture.snapshot.canPause = false;
+    },
+    start: async () => {
+      fixture.snapshot.session.running = true;
+      fixture.snapshot.session.paused = false;
+      fixture.snapshot.canStop = true;
+      fixture.snapshot.canPause = true;
+    },
+    startPackages: async (packageIds) => {
+      for (const packageId of packageIds) {
+        const entry = fixture.snapshot.session.packages[packageId];
+        if (entry) {
+          entry.status = "downloading";
+        }
+      }
+      fixture.snapshot.session.running = true;
+    },
+    stop: async () => {
+      fixture.snapshot.session.running = false;
+      fixture.snapshot.session.paused = false;
+      fixture.snapshot.canStop = false;
+      fixture.snapshot.canPause = false;
+    },
+    togglePause: async () => {
+      fixture.snapshot.session.paused = !fixture.snapshot.session.paused;
+      return fixture.snapshot.session.paused;
+    },
+    cancelPackage: async (packageId) => {
+      const entry = fixture.snapshot.session.packages[packageId];
+      if (entry) {
+        entry.cancelled = true;
+        entry.status = "cancelled";
+      }
+    },
+    renamePackage: async (packageId, newName) => {
+      const entry = fixture.snapshot.session.packages[packageId];
+      if (entry) {
+        entry.name = newName;
+      }
+    },
+    reorderPackages: async (packageIds) => {
+      fixture.snapshot.session.packageOrder = [...packageIds];
+    },
+    removeItem: async (itemId) => {
+      const item = fixture.snapshot.session.items[itemId];
+      if (item) {
+        const entry = fixture.snapshot.session.packages[item.packageId];
+        if (entry) {
+          entry.itemIds = entry.itemIds.filter((id) => id !== itemId);
+        }
+        delete fixture.snapshot.session.items[itemId];
+      }
+    },
+    togglePackage: async (packageId) => {
+      const entry = fixture.snapshot.session.packages[packageId];
+      if (entry) {
+        entry.enabled = !entry.enabled;
+      }
+    },
+    exportPackageSelection: async (packageIds) => ({
+      saved: true,
+      packageCount: packageIds.length,
+      linkCount: packageIds.reduce(
+        (count, packageId) => count + (fixture.snapshot.session.packages[packageId]?.itemIds.length ?? 0),
+        0
+      ),
+      filePath: "C:\\Visual\\Exports\\packages.txt"
+    }),
+    exportItemSelection: async (itemIds) => ({
+      saved: true,
+      packageCount: new Set(
+        itemIds.map((itemId) => fixture.snapshot.session.items[itemId]?.packageId).filter(Boolean)
+      ).size,
+      linkCount: itemIds.length,
+      filePath: "C:\\Visual\\Exports\\items.txt"
+    }),
+    exportQueue: async () => ({ saved: true }),
+    importQueue: async () => ({ addedPackages: 0, addedLinks: 0 }),
+    toggleClipboard: async () => {
+      fixture.snapshot.clipboardActive = !fixture.snapshot.clipboardActive;
+      fixture.snapshot.settings.clipboardWatch = fixture.snapshot.clipboardActive;
+      return fixture.snapshot.clipboardActive;
+    },
+    pickFolder: async () => "C:\\Visual\\Selected",
+    pickContainers: async () => ["C:\\Visual\\Containers\\visual.dlc"],
+    getSessionStats: async () => ({
+      bandwidth: {
+        samples: [
+          { timestamp: 1786312680000, speedBps: 10485760 },
+          { timestamp: 1786312740000, speedBps: 11534336 },
+          { timestamp: 1786312800000, speedBps: 12582912 }
+        ],
+        currentSpeedBps: 12582912,
+        averageSpeedBps: 11534336,
+        maxSpeedBps: 15728640,
+        totalBytesSession: 16642998272,
+        sessionDurationSeconds: 3600
+      },
+      totalDownloads: 4,
+      completedDownloads: 1,
+      failedDownloads: 1,
+      activeDownloads: 1,
+      queuedDownloads: 1
+    }),
+    resetSessionStats: async () => {
+      fixture.snapshot.stats.totalDownloaded = 0;
+      fixture.snapshot.stats.totalFilesSession = 0;
+      fixture.snapshot.session.totalDownloadedBytes = 0;
+    },
+    resetDownloadStats: async () => {
+      fixture.snapshot.stats.totalDownloadedAllTime = 0;
+      fixture.snapshot.stats.totalFilesAllTime = 0;
+      fixture.snapshot.settings.totalDownloadedAllTime = 0;
+      fixture.snapshot.settings.totalCompletedFilesAllTime = 0;
+      fixture.snapshot.settings.totalRuntimeAllTimeMs = 0;
+    },
+    restart: async () => {},
+    quit: async () => {},
+    exportBackup: async () => ({ saved: true }),
+    importBackup: async () => ({ restored: true, relaunch: false, message: "Visual backup importiert" }),
+    exportOnlineBackup: async () => ({ key: "visual-online-backup-key" }),
+    importOnlineBackup: async () => ({ restored: true, relaunch: false, message: "Visual online backup importiert" }),
+    exportSupportBundle: async () => ({ saved: true, filePath: "C:\\Visual\\Support\\support.zip" }),
+    openLog: async () => {},
+    openAuditLog: async () => {},
+    openRenameLog: async () => {},
+    openSessionLog: async () => {},
+    openTraceLog: async () => {},
+    openPackageLog: async () => {},
+    openItemLog: async () => {},
+    getDebugSetupCheck: async () => ({
+      status: "ok",
+      enabled: false,
+      runtimeBaseDir: "C:\\Visual\\Runtime",
+      host: "127.0.0.1",
+      port: 7843,
+      localOnly: true,
+      tokenConfigured: true,
+      tokenPath: "C:\\Visual\\Runtime\\debug-token",
+      supportManifestPath: "C:\\Visual\\Runtime\\support-manifest.json",
+      supportManifestPresent: true,
+      traceConfigPath: "C:\\Visual\\Runtime\\trace-config.json",
+      traceLogPath: "C:\\Visual\\Runtime\\trace.log",
+      traceEnabled: fixture.traceConfig.enabled,
+      traceAutoDisableAt: fixture.traceConfig.autoDisableAt,
+      diskSpace: {
+        runtime: { path: "C:\\Visual\\Runtime", totalBytes: 1099511627776, freeBytes: 549755813888, freePercent: 50 },
+        output: { path: "C:\\Visual\\Downloads", totalBytes: 1099511627776, freeBytes: 549755813888, freePercent: 50 },
+        extract: { path: "C:\\Visual\\Extracted", totalBytes: 1099511627776, freeBytes: 549755813888, freePercent: 50 }
+      },
+      logSummary: {
+        totalBytes: 12288,
+        main: { path: "C:\\Visual\\Runtime\\main.log", exists: true, bytes: 4096 },
+        mainBackup: { path: null, exists: false, bytes: 0 },
+        audit: { path: "C:\\Visual\\Runtime\\audit.log", exists: true, bytes: 2048 },
+        auditBackup: { path: null, exists: false, bytes: 0 },
+        rename: { path: "C:\\Visual\\Runtime\\rename.log", exists: true, bytes: 1024 },
+        renameBackup: { path: null, exists: false, bytes: 0 },
+        session: { path: "C:\\Visual\\Runtime\\session.log", exists: true, bytes: 2048 },
+        trace: { path: "C:\\Visual\\Runtime\\trace.log", exists: true, bytes: 3072 },
+        traceBackup: { path: null, exists: false, bytes: 0 },
+        sessionLogs: { path: "C:\\Visual\\Runtime\\sessions", exists: true, fileCount: 2, bytes: 2048 },
+        packageLogs: { path: "C:\\Visual\\Runtime\\packages", exists: true, fileCount: 3, bytes: 3072 },
+        itemLogs: { path: "C:\\Visual\\Runtime\\items", exists: true, fileCount: 4, bytes: 4096 }
+      },
+      supportBundle: {
+        estimatedBytes: 24576,
+        estimatedEntries: 12,
+        duplicatedLiveLogBytes: 0,
+        note: "Visual support bundle"
+      },
+      warnings: [],
+      notes: ["Deterministischer Visual-Harness"],
+      localUrls: {
+        health: "http://127.0.0.1:7843/health",
+        meta: "http://127.0.0.1:7843/meta",
+        diagnostics: "http://127.0.0.1:7843/diagnostics"
+      },
+      remoteUrlTemplates: {
+        health: "https://visual.example.test/health",
+        meta: "https://visual.example.test/meta",
+        diagnostics: "https://visual.example.test/diagnostics"
+      }
+    }),
+    getRecentErrors: async () => [
+      { ts: "2026-08-10T11:55:00.000Z", level: "WARN", message: "Visualer Beispielhinweis" }
+    ],
+    testNotification: async () => true,
+    getTraceConfig: async () => clone(fixture.traceConfig),
+    setTraceEnabled: async (enabled) => {
+      fixture.traceConfig = { ...fixture.traceConfig, enabled };
+      return clone(fixture.traceConfig);
+    },
+    rotateDebugToken: async () => ({ path: "C:\\Visual\\Runtime\\debug-token" }),
+    getRemoteDiagnostics: async () => clone(fixture.remoteDiagnostics),
+    enableRemoteDiagnostics: async (input) => {
+      fixture.remoteDiagnostics = {
+        ...fixture.remoteDiagnostics,
+        status: {
+          ...fixture.remoteDiagnostics.status,
+          running: true,
+          host: input.hostMode === "local" ? "127.0.0.1" : "0.0.0.0",
+          port: input.port ?? 7843,
+          localOnly: input.hostMode === "local",
+          allowlistCount: input.allowlist.length
+        },
+        publicHost: input.publicHost,
+        name: input.name ?? fixture.remoteDiagnostics.name,
+        allowlist: [...input.allowlist]
+      };
+      return clone(fixture.remoteDiagnostics);
+    },
+    disableRemoteDiagnostics: async () => {
+      fixture.remoteDiagnostics = {
+        ...fixture.remoteDiagnostics,
+        status: { ...fixture.remoteDiagnostics.status, running: false }
+      };
+      return clone(fixture.remoteDiagnostics);
+    },
+    rotateRemoteDiagnosticsToken: async () => clone(fixture.remoteDiagnostics),
+    openRealDebridLogin: async () => {},
+    openAllDebridLogin: async () => {},
+    importBestDebridCookies: async () => 2,
+    getAllDebridHostInfo: async () => ({
+      host: "rapidgator.net",
+      source: "api",
+      state: "up",
+      statusLabel: "Verfügbar",
+      fetchedAt: 1786312800000,
+      lastCheckedAt: 1786312740000,
+      quota: 42,
+      quotaMax: 100,
+      quotaType: "daily",
+      limitSimuDl: 8,
+      note: "Visual host status"
+    }),
+    getDebridLinkHostLimits: async () => {
+      const primaryKey = parseDebridLinkApiKeys(fixture.snapshot.settings.debridLinkApiKeys)[0];
+      return [{
+        keyId: primaryKey.id,
+        keyLabel: primaryKey.label,
+        host: "ddownload.com",
+        fetchedAt: 1786312800000,
+        trafficCurrentBytes: 53687091200,
+        trafficMaxBytes: 268435456000,
+        linksCurrent: 12,
+        linksMax: 100,
+        note: "Visual quota",
+        state: "ready",
+        stateLabel: "Bereit",
+        stateDetail: "Kontingent verfügbar",
+        cooldownUntil: null,
+        cooldownRemainingMs: 0,
+        lastCheckedAt: 1786312740000,
+        hostState: "up",
+        hostStateLabel: "Online",
+        hostNote: "Hoster verfügbar"
+      }];
+    },
+    checkDebridAccounts: async () => clone(Object.values(fixture.snapshot.settings.debridAccountStatuses)),
+    checkMegaDebridAccount: async () => {
+      const status = Object.values(fixture.snapshot.settings.debridAccountStatuses).find(
+        (entry) => entry.provider === "megadebrid"
+      );
+      return status ? clone(status) : null;
+    },
+    retryExtraction: async (packageId) => {
+      const entry = fixture.snapshot.session.packages[packageId];
+      if (entry) {
+        entry.status = "extracting";
+      }
+    },
+    extractNow: async (packageId) => {
+      const entry = fixture.snapshot.session.packages[packageId];
+      if (entry) {
+        entry.status = "extracting";
+      }
+    },
+    resetPackage: async (packageId) => {
+      const entry = fixture.snapshot.session.packages[packageId];
+      if (entry) {
+        entry.status = "queued";
+        entry.cancelled = false;
+      }
+    },
+    getHistory: async () => {
+      historyRequestCount += 1;
+      if (historyRequestCount > 1 && historyState === "loading") {
+        return new Promise<HistoryEntry[]>(() => {});
+      }
+      if (historyRequestCount > 1 && historyState === "error") {
+        throw new Error("Visual history load failed");
+      }
+      return clone(fixture.history);
+    },
+    clearHistory: async () => {
+      fixture.history.splice(0, fixture.history.length);
+    },
+    removeHistoryEntry: async (entryId) => {
+      const index = fixture.history.findIndex((entry) => entry.id === entryId);
+      if (index >= 0) {
+        fixture.history.splice(index, 1);
+      }
+    },
+    revealHistoryEntry: async (entryId) => fixture.history.some((entry) => entry.id === entryId)
+      ? { ok: true }
+      : { ok: false, reason: "entry-not-found" },
+    setPackagePriority: async (packageId, priority) => {
+      const entry = fixture.snapshot.session.packages[packageId];
+      if (entry) {
+        entry.priority = priority;
+      }
+    },
+    skipItems: async (itemIds) => {
+      for (const itemId of itemIds) {
+        const item = fixture.snapshot.session.items[itemId];
+        if (item) {
+          item.status = "cancelled";
+          item.fullStatus = "Übersprungen";
+        }
+      }
+    },
+    resetItems: async (itemIds) => {
+      for (const itemId of itemIds) {
+        const item = fixture.snapshot.session.items[itemId];
+        if (item) {
+          item.status = "queued";
+          item.downloadedBytes = 0;
+          item.progressPercent = 0;
+          item.speedBps = 0;
+          item.lastError = "";
+          item.fullStatus = "In Warteschlange";
+        }
+      }
+    },
+    startItems: async (itemIds) => {
+      for (const itemId of itemIds) {
+        const item = fixture.snapshot.session.items[itemId];
+        if (item) {
+          item.status = "downloading";
+          item.fullStatus = "Download läuft";
+        }
+      }
+      fixture.snapshot.session.running = true;
+    },
+    reportRendererError: () => {},
+    onStateUpdate: () => stableNoopUnsubscribe,
+    onClipboardDetected: () => stableNoopUnsubscribe,
+    onUpdateInstallProgress: () => stableNoopUnsubscribe
+  };
+}

tests/visual/ui-driver.ts

@@ -0,0 +1,546 @@
+import { VISUAL_SCENARIOS, type VisualScenario } from "./fixtures";
+
+export type MainViewId = "downloads" | "collector" | "settings" | "history" | "statistics";
+
+export interface VisualInteraction {
+  type: "click" | "hover" | "fill" | "press" | "wait-visible" | "wait-absent";
+  role?: string;
+  name?: string;
+  value?: string;
+  key?: string;
+}
+
+export interface VisualAssertion {
+  type: "active-view" | "visible" | "absent" | "nonempty" | "minimum-row-count" | "layer-above";
+  role?: string;
+  name?: string;
+  region?: string;
+  value?: string | number;
+  referenceRole?: string;
+  referenceName?: string;
+}
+
+export interface VisualCapture {
+  name: string;
+  scenario: VisualScenario;
+  viewport: {
+    width: number;
+    height: number;
+  };
+  activeView: MainViewId;
+  interactions: VisualInteraction[];
+  assertions: VisualAssertion[];
+}
+
+const MAIN_VIEWS = ["downloads", "collector", "settings", "history", "statistics"] as const;
+const INTERACTION_TYPES = ["click", "hover", "fill", "press", "wait-visible", "wait-absent"] as const;
+const ASSERTION_TYPES = ["active-view", "visible", "absent", "nonempty", "minimum-row-count", "layer-above"] as const;
+const REGION_PATTERN = /^[a-z0-9]+(?:-[a-z0-9]+)*$/;
+const VIEW_NAMES: Record<MainViewId, string> = {
+  downloads: "Downloads",
+  collector: "Linksammler",
+  settings: "Einstellungen",
+  history: "Verlauf",
+  statistics: "Statistiken"
+};
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value);
+}
+
+function isNonemptyString(value: unknown): value is string {
+  return typeof value === "string" && value.trim().length > 0;
+}
+
+function isOneOf<T extends string>(value: unknown, choices: readonly T[]): value is T {
+  return typeof value === "string" && choices.includes(value as T);
+}
+
+function validateRoleName(value: Record<string, unknown>, path: string, errors: string[]): void {
+  if (!isNonemptyString(value.role)) {
+    errors.push(`${path}.role must be a nonempty string`);
+  }
+  if (!isNonemptyString(value.name)) {
+    errors.push(`${path}.name must be a nonempty string`);
+  }
+}
+
+function validateRegion(value: unknown, path: string, errors: string[]): void {
+  if (!isNonemptyString(value) || !REGION_PATTERN.test(value)) {
+    errors.push(`${path} must match ^[a-z0-9]+(?:-[a-z0-9]+)*$`);
+  }
+}
+
+function validateInteraction(value: unknown, path: string, errors: string[]): void {
+  if (!isRecord(value)) {
+    errors.push(`${path} must be an object`);
+    return;
+  }
+  if (!isOneOf(value.type, INTERACTION_TYPES)) {
+    errors.push(`${path}.type must be one of ${INTERACTION_TYPES.join(", ")}`);
+    return;
+  }
+  validateRoleName(value, path, errors);
+  if (value.type === "fill" && typeof value.value !== "string") {
+    errors.push(`${path}.value must be a string`);
+  }
+  if (value.type === "press" && !isNonemptyString(value.key)) {
+    errors.push(`${path}.key must be a nonempty string`);
+  }
+}
+
+function validateAssertion(value: unknown, path: string, errors: string[]): void {
+  if (!isRecord(value)) {
+    errors.push(`${path} must be an object`);
+    return;
+  }
+  if (!isOneOf(value.type, ASSERTION_TYPES)) {
+    errors.push(`${path}.type must be one of ${ASSERTION_TYPES.join(", ")}`);
+    return;
+  }
+  if (value.type === "active-view") {
+    if (!isOneOf(value.value, MAIN_VIEWS)) {
+      errors.push(`${path}.value must be one of ${MAIN_VIEWS.join(", ")}`);
+    }
+    return;
+  }
+  if (value.type === "minimum-row-count") {
+    validateRegion(value.region, `${path}.region`, errors);
+    if (!Number.isInteger(value.value) || Number(value.value) < 0) {
+      errors.push(`${path}.value must be a nonnegative integer`);
+    }
+    return;
+  }
+  if (value.type === "layer-above") {
+    validateRoleName(value, path, errors);
+    if (!isNonemptyString(value.referenceRole)) {
+      errors.push(`${path}.referenceRole must be a nonempty string`);
+    }
+    if (!isNonemptyString(value.referenceName)) {
+      errors.push(`${path}.referenceName must be a nonempty string`);
+    }
+    return;
+  }
+  if (value.region !== undefined) {
+    validateRegion(value.region, `${path}.region`, errors);
+    return;
+  }
+  validateRoleName(value, path, errors);
+}
+
+export function validateVisualCaptureManifest(input: unknown): string[] {
+  if (!Array.isArray(input)) {
+    return ["$ must be an array"];
+  }
+  const errors: string[] = [];
+  const names = new Set<string>();
+  input.forEach((value, index) => {
+    const path = `$[${index}]`;
+    const entry = isRecord(value) ? value : {};
+    if (!isRecord(value)) {
+      errors.push(`${path} must be an object`);
+    }
+    if (!isNonemptyString(entry.name)) {
+      errors.push(`${path}.name must be a nonempty string`);
+    } else if (names.has(entry.name)) {
+      errors.push(`${path}.name must be unique`);
+    } else {
+      names.add(entry.name);
+    }
+    if (!isOneOf(entry.scenario, VISUAL_SCENARIOS)) {
+      errors.push(`${path}.scenario must be one of ${VISUAL_SCENARIOS.join(", ")}`);
+    }
+    if (!isRecord(entry.viewport)) {
+      errors.push(`${path}.viewport must be an object`);
+    } else {
+      if (!Number.isInteger(entry.viewport.width) || Number(entry.viewport.width) <= 0) {
+        errors.push(`${path}.viewport.width must be a positive integer`);
+      }
+      if (!Number.isInteger(entry.viewport.height) || Number(entry.viewport.height) <= 0) {
+        errors.push(`${path}.viewport.height must be a positive integer`);
+      }
+    }
+    if (!isOneOf(entry.activeView, MAIN_VIEWS)) {
+      errors.push(`${path}.activeView must be one of ${MAIN_VIEWS.join(", ")}`);
+    }
+    if (!Array.isArray(entry.interactions)) {
+      errors.push(`${path}.interactions must be an array`);
+    } else {
+      entry.interactions.forEach((interaction, interactionIndex) => {
+        validateInteraction(interaction, `${path}.interactions[${interactionIndex}]`, errors);
+      });
+    }
+    if (!Array.isArray(entry.assertions)) {
+      errors.push(`${path}.assertions must be an array`);
+    } else {
+      entry.assertions.forEach((assertion, assertionIndex) => {
+        validateAssertion(assertion, `${path}.assertions[${assertionIndex}]`, errors);
+      });
+    }
+  });
+  return errors;
+}
+
+export async function loadVisualCapture(name: string): Promise<VisualCapture> {
+  const response = await fetch(new URL("./capture-manifest.json", import.meta.url));
+  if (!response.ok) {
+    throw new Error(`capture manifest could not be loaded: ${response.status}`);
+  }
+  const manifest: unknown = await response.json();
+  const errors = validateVisualCaptureManifest(manifest);
+  if (errors.length > 0) {
+    throw new Error(`capture manifest is invalid: ${errors.join("; ")}`);
+  }
+  const capture = (manifest as VisualCapture[]).find((entry) => entry.name === name);
+  if (!capture) {
+    throw new Error(`capture "${name}" is missing`);
+  }
+  return capture;
+}
+
+function roleForElement(element: Element): string | null {
+  const explicitRole = element.getAttribute("role");
+  if (explicitRole) {
+    return explicitRole;
+  }
+  const tagName = element.tagName.toLowerCase();
+  if (tagName === "button") {
+    return "button";
+  }
+  if (tagName === "textarea") {
+    return "textbox";
+  }
+  if (tagName === "input") {
+    const type = (element.getAttribute("type") ?? "text").toLowerCase();
+    if (["text", "email", "search", "tel", "url", "password"].includes(type)) {
+      return "textbox";
+    }
+  }
+  if (tagName === "section" && accessibleName(element).length > 0) {
+    return "region";
+  }
+  return null;
+}
+
+function accessibleName(element: Element): string {
+  const ariaLabel = element.getAttribute("aria-label");
+  if (ariaLabel !== null) {
+    return ariaLabel.trim();
+  }
+  const labelledBy = element.getAttribute("aria-labelledby");
+  if (labelledBy) {
+    const ownerDocument = element.ownerDocument;
+    const name = labelledBy
+      .split(/\s+/)
+      .map((id) => ownerDocument?.getElementById(id)?.textContent?.trim() ?? "")
+      .filter(Boolean)
+      .join(" ");
+    if (name) {
+      return name;
+    }
+  }
+  return element.textContent?.replace(/\s+/g, " ").trim() ?? "";
+}
+
+function isVisible(element: Element, targetDocument: Document): boolean {
+  if (element.hasAttribute("hidden") || element.getAttribute("aria-hidden") === "true") {
+    return false;
+  }
+  const style = targetDocument.defaultView?.getComputedStyle(element);
+  if (style && (
+    style.display === "none"
+    || style.visibility === "hidden"
+    || style.visibility === "collapse"
+    || style.opacity === "0"
+  )) {
+    return false;
+  }
+  return element.getClientRects().length > 0;
+}
+
+function targetLabel(role: string, name: string): string {
+  return `${role} "${name}"`;
+}
+
+function roleMatches(targetDocument: Document, role: string, name: string): Element[] {
+  return Array.from(targetDocument.querySelectorAll("*")).filter((element) => (
+    roleForElement(element) === role
+    && accessibleName(element) === name
+    && isVisible(element, targetDocument)
+  ));
+}
+
+function resolveRole(targetDocument: Document, role: string, name: string): Element {
+  const matches = roleMatches(targetDocument, role, name);
+  if (matches.length === 0) {
+    throw new Error(`${targetLabel(role, name)} is missing`);
+  }
+  if (matches.length > 1) {
+    throw new Error(`${targetLabel(role, name)} is ambiguous`);
+  }
+  return matches[0];
+}
+
+function regionMatches(targetDocument: Document, region: string): Element[] {
+  if (!REGION_PATTERN.test(region)) {
+    throw new Error(`region "${region}" is invalid`);
+  }
+  return Array.from(targetDocument.querySelectorAll("[data-visual-region]"))
+    .filter((element) => element.getAttribute("data-visual-region") === region)
+    .filter((element) => isVisible(element, targetDocument));
+}
+
+function resolveRegion(targetDocument: Document, region: string): Element {
+  const matches = regionMatches(targetDocument, region);
+  if (matches.length === 0) {
+    throw new Error(`region marker "${region}" is missing`);
+  }
+  if (matches.length > 1) {
+    throw new Error(`region marker "${region}" is ambiguous`);
+  }
+  return matches[0];
+}
+
+function requestFrame(targetDocument: Document): Promise<void> {
+  return new Promise((resolve) => {
+    const request = targetDocument.defaultView?.requestAnimationFrame;
+    if (!request) {
+      resolve();
+      return;
+    }
+    request.call(targetDocument.defaultView, () => resolve());
+  });
+}
+
+async function waitForStableDom(targetDocument: Document): Promise<void> {
+  await requestFrame(targetDocument);
+  await requestFrame(targetDocument);
+}
+
+function createEvent(targetDocument: Document, type: string, kind: "event" | "mouse" | "pointer" | "keyboard", key = ""): Event | null {
+  const view = targetDocument.defaultView;
+  if (!view) {
+    return null;
+  }
+  if (kind === "keyboard") {
+    return new view.KeyboardEvent(type, { bubbles: true, cancelable: true, key });
+  }
+  if (kind === "pointer" && typeof view.PointerEvent === "function") {
+    return new view.PointerEvent(type, { bubbles: true, cancelable: true });
+  }
+  if (kind === "mouse" || kind === "pointer") {
+    return new view.MouseEvent(type, { bubbles: true, cancelable: true });
+  }
+  return new view.Event(type, { bubbles: true, cancelable: true });
+}
+
+function dispatch(element: Element, event: Event | null): void {
+  if (event && typeof element.dispatchEvent === "function") {
+    element.dispatchEvent(event);
+  }
+}
+
+function focusElement(element: Element): void {
+  if ("focus" in element && typeof element.focus === "function") {
+    element.focus();
+  }
+}
+
+function clickElement(targetDocument: Document, element: Element): void {
+  focusElement(element);
+  dispatch(element, createEvent(targetDocument, "pointerdown", "pointer"));
+  dispatch(element, createEvent(targetDocument, "mousedown", "mouse"));
+  dispatch(element, createEvent(targetDocument, "pointerup", "pointer"));
+  dispatch(element, createEvent(targetDocument, "mouseup", "mouse"));
+  if ("click" in element && typeof element.click === "function") {
+    element.click();
+  } else {
+    dispatch(element, createEvent(targetDocument, "click", "mouse"));
+  }
+}
+
+function hoverElement(targetDocument: Document, element: Element): void {
+  dispatch(element, createEvent(targetDocument, "pointerover", "pointer"));
+  dispatch(element, createEvent(targetDocument, "pointerenter", "pointer"));
+  dispatch(element, createEvent(targetDocument, "mouseover", "mouse"));
+  dispatch(element, createEvent(targetDocument, "mouseenter", "mouse"));
+}
+
+function setNativeValue(targetDocument: Document, element: Element, value: string): void {
+  const view = targetDocument.defaultView;
+  if (!view) {
+    throw new Error("document window is missing");
+  }
+  let prototype: object | null = Object.getPrototypeOf(element);
+  let setter: ((this: Element, nextValue: string) => void) | undefined;
+  while (prototype && !setter) {
+    setter = Object.getOwnPropertyDescriptor(prototype, "value")?.set as typeof setter;
+    prototype = Object.getPrototypeOf(prototype);
+  }
+  if (!setter) {
+    throw new Error("textbox native value setter is missing");
+  }
+  focusElement(element);
+  setter.call(element, value);
+  dispatch(element, createEvent(targetDocument, "input", "event"));
+  dispatch(element, createEvent(targetDocument, "change", "event"));
+}
+
+function pressElement(targetDocument: Document, element: Element, key: string): void {
+  focusElement(element);
+  dispatch(element, createEvent(targetDocument, "keydown", "keyboard", key));
+  dispatch(element, createEvent(targetDocument, "keyup", "keyboard", key));
+}
+
+async function waitForRoleState(
+  targetDocument: Document,
+  role: string,
+  name: string,
+  present: boolean,
+  maxFrames = 180
+): Promise<void> {
+  for (let frame = 0; frame <= maxFrames; frame += 1) {
+    const count = roleMatches(targetDocument, role, name).length;
+    if ((present && count === 1) || (!present && count === 0)) {
+      return;
+    }
+    if (present && count > 1) {
+      throw new Error(`${targetLabel(role, name)} is ambiguous`);
+    }
+    if (frame < maxFrames) {
+      await requestFrame(targetDocument);
+    }
+  }
+  throw new Error(`${targetLabel(role, name)} did not become ${present ? "visible" : "absent"}`);
+}
+
+async function activateView(activeView: MainViewId, targetDocument: Document): Promise<void> {
+  const name = VIEW_NAMES[activeView];
+  const tabMatches = roleMatches(targetDocument, "tab", name);
+  const buttonMatches = roleMatches(targetDocument, "button", name);
+  const viewButtonMatches = buttonMatches.filter((element) => element.classList.contains("tab"));
+  const matches = tabMatches.length > 0
+    ? tabMatches
+    : viewButtonMatches.length > 0
+      ? viewButtonMatches
+      : buttonMatches;
+  if (matches.length === 0) {
+    throw new Error(`tab or button "${name}" is missing`);
+  }
+  if (matches.length > 1) {
+    throw new Error(`tab or button "${name}" is ambiguous`);
+  }
+  clickElement(targetDocument, matches[0]);
+  await waitForStableDom(targetDocument);
+}
+
+async function runInteraction(interaction: VisualInteraction, targetDocument: Document): Promise<void> {
+  const role = interaction.role as string;
+  const name = interaction.name as string;
+  if (interaction.type === "wait-visible" || interaction.type === "wait-absent") {
+    await waitForRoleState(targetDocument, role, name, interaction.type === "wait-visible");
+    await waitForStableDom(targetDocument);
+    return;
+  }
+  const element = resolveRole(targetDocument, role, name);
+  if (interaction.type === "click") {
+    clickElement(targetDocument, element);
+  } else if (interaction.type === "hover") {
+    hoverElement(targetDocument, element);
+  } else if (interaction.type === "fill") {
+    setNativeValue(targetDocument, element, interaction.value as string);
+  } else {
+    pressElement(targetDocument, element, interaction.key as string);
+  }
+  await waitForStableDom(targetDocument);
+}
+
+function resolveAssertionElement(assertion: VisualAssertion, targetDocument: Document): Element {
+  if (assertion.region) {
+    return resolveRegion(targetDocument, assertion.region);
+  }
+  return resolveRole(targetDocument, assertion.role as string, assertion.name as string);
+}
+
+function assertActiveView(activeView: MainViewId, targetDocument: Document): void {
+  const marker = targetDocument.querySelector(`[data-visual-active-view="${activeView}"]`);
+  if (marker && isVisible(marker, targetDocument)) {
+    return;
+  }
+  const name = VIEW_NAMES[activeView];
+  const candidates = [
+    ...roleMatches(targetDocument, "tab", name),
+    ...roleMatches(targetDocument, "button", name)
+  ];
+  const active = candidates.filter((element) => (
+    element.getAttribute("aria-current") === "page"
+    || element.getAttribute("aria-selected") === "true"
+    || element.classList.contains("active")
+  ));
+  if (active.length !== 1) {
+    throw new Error(`active view "${activeView}" is missing`);
+  }
+}
+
+function rowCount(element: Element, targetDocument: Document): number {
+  return Array.from(element.querySelectorAll('[role="row"]')).filter((row) => isVisible(row, targetDocument)).length;
+}
+
+function assertCapture(assertion: VisualAssertion, targetDocument: Document): void {
+  if (assertion.type === "active-view") {
+    assertActiveView(assertion.value as MainViewId, targetDocument);
+    return;
+  }
+  if (assertion.type === "absent") {
+    if (assertion.region) {
+      const matches = regionMatches(targetDocument, assertion.region);
+      if (matches.length > 1) {
+        throw new Error(`region marker "${assertion.region}" is ambiguous`);
+      }
+      if (matches.length > 0) {
+        throw new Error(`region marker "${assertion.region}" is visible`);
+      }
+    } else {
+      const matches = roleMatches(targetDocument, assertion.role as string, assertion.name as string);
+      if (matches.length > 0) {
+        throw new Error(`${targetLabel(assertion.role as string, assertion.name as string)} is visible`);
+      }
+    }
+    return;
+  }
+  const element = resolveAssertionElement(assertion, targetDocument);
+  if (assertion.type === "visible") {
+    return;
+  }
+  if (assertion.type === "nonempty") {
+    if (!(element.textContent ?? "").trim()) {
+      throw new Error(`${assertion.region ? `region marker "${assertion.region}"` : targetLabel(assertion.role as string, assertion.name as string)} is empty`);
+    }
+    return;
+  }
+  if (assertion.type === "minimum-row-count") {
+    const count = rowCount(element, targetDocument);
+    if (count < Number(assertion.value)) {
+      throw new Error(`region marker "${assertion.region}" has ${count} rows, expected at least ${assertion.value}`);
+    }
+    return;
+  }
+  const reference = resolveRole(targetDocument, assertion.referenceRole as string, assertion.referenceName as string);
+  const view = targetDocument.defaultView;
+  const zIndex = Number.parseInt(view?.getComputedStyle(element).zIndex ?? "", 10);
+  const referenceZIndex = Number.parseInt(view?.getComputedStyle(reference).zIndex ?? "", 10);
+  if (!Number.isFinite(zIndex) || !Number.isFinite(referenceZIndex) || zIndex <= referenceZIndex) {
+    throw new Error(`${targetLabel(assertion.role as string, assertion.name as string)} is not layered above ${targetLabel(assertion.referenceRole as string, assertion.referenceName as string)}`);
+  }
+}
+
+export async function prepareVisualCapture(capture: VisualCapture, targetDocument: Document): Promise<void> {
+  await activateView(capture.activeView, targetDocument);
+  for (const interaction of capture.interactions) {
+    await runInteraction(interaction, targetDocument);
+  }
+  for (const assertion of capture.assertions) {
+    assertCapture(assertion, targetDocument);
+  }
+  await waitForStableDom(targetDocument);
+}

tests/visual/vite.config.mts

@@ -0,0 +1,14 @@
+import path from "node:path";
+import react from "@vitejs/plugin-react";
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  plugins: [react()],
+  root: path.resolve(__dirname),
+  publicDir: path.resolve(__dirname, "../../assets"),
+  server: {
+    fs: {
+      allow: [path.resolve(__dirname, "../..")]
+    }
+  }
+});

vitest.config.ts

@@ -3,7 +3,7 @@ import { defineConfig } from "vitest/config";
 export default defineConfig({
   test: {
     environment: "node",
-    include: ["tests/**/*.test.ts", "scripts/tests/**/*.test.ts"],
+    include: ["tests/**/*.test.ts", "tests/**/*.test.tsx", "scripts/tests/**/*.test.ts"],
     globals: true
   }
 });