Auto format display:
- 'Auto' chip now shows detected extension: 'Auto (.webm)', 'Auto (.mp3)'
- Backend guesses extension from URL domain (youtube→webm, bandcamp→mp3,
soundcloud→opus, etc.) and extract_info ext field for single videos
Preferences persistence:
- Media type (video/audio) and output format saved to localStorage
- Settings survive page refreshes and gear panel open/close
Toast notifications:
- Copy link shows animated toast 'Link copied to clipboard'
- Toast appears at bottom center, auto-dismisses after 2s
Full delete on cancel:
- DELETE /downloads/{id} now removes the job from DB and deletes the file
- Previously marked as 'cancelled by user' and persisted in history
- Jobs dismissed with X are completely purged from the system
Playlist handling:
- Playlists are split into individual jobs at enqueue time
- Each entry downloads independently with its own progress tracking
- Private/unavailable playlist entries detected and reported in preview
- Individual jobs use noplaylist=True to prevent re-expansion
Session persistence:
- App.vue now calls fetchJobs() on mount to reload history from backend
- Download history survives page refresh via session cookie
Audio detection:
- Domain-based detection for known audio sources (bandcamp, soundcloud)
- Bandcamp albums now correctly trigger audio-only mode
Bug fixes:
- ProgressEvent accepts float for downloaded_bytes/total_bytes (fixes
pydantic int_from_float validation errors from some extractors)
- SSE job_update events now include error_message for failed jobs
- Fixed test_health_queue_depth test to use direct DB insertion instead
of POST endpoint (avoids yt-dlp side effects in test env)
