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.

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();
+  });
+}