Add daily traffic limits, auto-sort packages, Debrid-Link multi-key improvements

Daily traffic limits:
- Per-provider daily download limit (configurable in GB per provider)
- Per Debrid-Link API key daily limit (individual limits per key)
- Usage tracking with automatic daily reset at midnight
- Provider is skipped when daily limit reached, falls back to next provider
- Reset button per provider and per Debrid-Link key in account settings
- Hoster routing skips daily-limited providers gracefully

Debrid-Link multi-key improvements:
- Keys now display with labels (#1, #2...) and masked tokens in account list
- Option to show detailed per-key view with individual usage stats
- Keys that hit their daily limit are automatically skipped
- providerAccountId/providerAccountLabel stored per download item

Auto-sort packages by progress:
- Active packages automatically sorted to top during downloads
- Sorted by completion ratio, then downloaded bytes
- Toggle in settings (autoSortPackagesByProgress)

UI polish:
- Package column headers: flatter, more transparent design
- LinkSnappy mode label: "Login" renamed to "Web"
- Account list: new toggle for detailed Debrid-Link key display
- Account usage stats section with warning styling

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/package-order.test.ts

@@ -0,0 +1,82 @@
+import { describe, expect, it } from "vitest";
+import type { DownloadItem, PackageEntry } from "../src/shared/types";
+import { sortPackagesForDisplay } from "../src/renderer/package-order";
+
+function createPackage(id: string, itemIds: string[]): PackageEntry {
+  const now = Date.now();
+  return {
+    id,
+    name: id,
+    outputDir: "",
+    extractDir: "",
+    status: "queued",
+    itemIds,
+    cancelled: false,
+    enabled: true,
+    priority: "normal",
+    createdAt: now,
+    updatedAt: now
+  };
+}
+
+function createItem(id: string, packageId: string, status: DownloadItem["status"], downloadedBytes: number): DownloadItem {
+  const now = Date.now();
+  return {
+    id,
+    packageId,
+    url: `https://hoster.example/${id}`,
+    provider: null,
+    status,
+    retries: 0,
+    speedBps: 0,
+    downloadedBytes,
+    totalBytes: downloadedBytes,
+    progressPercent: downloadedBytes > 0 ? 50 : 0,
+    fileName: `${id}.bin`,
+    targetPath: "",
+    resumable: true,
+    attempts: 0,
+    lastError: "",
+    fullStatus: "",
+    createdAt: now,
+    updatedAt: now
+  };
+}
+
+describe("sortPackagesForDisplay", () => {
+  it("moves active packages with more progress to the top when auto sort is enabled", () => {
+    const packages = [
+      createPackage("pkg-a", ["a1", "a2"]),
+      createPackage("pkg-b", ["b1", "b2"]),
+      createPackage("pkg-c", ["c1"])
+    ];
+    const items: Record<string, DownloadItem> = {
+      a1: createItem("a1", "pkg-a", "downloading", 250),
+      a2: createItem("a2", "pkg-a", "completed", 500),
+      b1: createItem("b1", "pkg-b", "downloading", 800),
+      b2: createItem("b2", "pkg-b", "completed", 900),
+      c1: createItem("c1", "pkg-c", "queued", 0)
+    };
+
+    const sorted = sortPackagesForDisplay(packages, items, true, true);
+
+    expect(sorted.map((pkg) => pkg.id)).toEqual(["pkg-b", "pkg-a", "pkg-c"]);
+  });
+
+  it("keeps package order untouched when auto sort is disabled", () => {
+    const packages = [
+      createPackage("pkg-a", ["a1"]),
+      createPackage("pkg-b", ["b1"]),
+      createPackage("pkg-c", ["c1"])
+    ];
+    const items: Record<string, DownloadItem> = {
+      a1: createItem("a1", "pkg-a", "queued", 0),
+      b1: createItem("b1", "pkg-b", "downloading", 500),
+      c1: createItem("c1", "pkg-c", "queued", 0)
+    };
+
+    const sorted = sortPackagesForDisplay(packages, items, true, false);
+
+    expect(sorted.map((pkg) => pkg.id)).toEqual(["pkg-a", "pkg-b", "pkg-c"]);
+  });
+});