feat(downloads): add live limits clipboard capture and byte progress

src/utils/downloads.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from 'vitest';
+import type { DownloadItem } from '../bindings/DownloadItem';
+import { redactDownloadForPersistence } from './downloads';
+
+const item = (status: DownloadItem['status']): DownloadItem => ({
+  id: 'download-1',
+  url: 'https://example.com/file.bin',
+  fileName: 'file.bin',
+  status,
+  category: 'Other',
+  dateAdded: '2026-07-15T00:00:00.000Z',
+  downloadedBytes: 1024,
+  totalBytes: 4096,
+  totalIsEstimate: false
+});
+
+describe('download persistence progress snapshots', () => {
+  it('does not write active byte counters on every progress event', () => {
+    const persisted = redactDownloadForPersistence(item('downloading'));
+
+    expect(persisted.downloadedBytes).toBeUndefined();
+    expect(persisted.totalBytes).toBeUndefined();
+    expect(persisted.totalIsEstimate).toBeUndefined();
+  });
+
+  it('keeps byte counters for paused snapshots', () => {
+    const persisted = redactDownloadForPersistence(item('paused'));
+
+    expect(persisted.downloadedBytes).toBe(1024);
+    expect(persisted.totalBytes).toBe(4096);
+    expect(persisted.totalIsEstimate).toBe(false);
+  });
+});