- Add Playwright E2E tests covering real user download journeys:
- Search anime → choose episodes → trigger download (with toast)
- Real file download via static fixture and verify completion in UI
- Click new release on homepage → switch to anime search tab
- Search for series and display mocked results
- Fix bug in downloads_list.html: CSS classes used task.status (enum)
which rendered as 'status-DownloadStatus.COMPLETED' instead of
'status-completed'. Use task.status.value for correct CSS class names.
- Add static test fixture (20KB fake MP4) for reliable download tests
- All 16 E2E tests passing (12 existing + 4 new)