Robin Choice
e58a7c250e
feat: PWA Phase 1 — offline audio download and playback
- API: GET /versions/:id/audio?quality=stream|original (server proxy for SW caching)
- API: GET /versions/:id/waveform-data (server proxy for offline waveform)
- SW: cache-first from musichub-offline-v1 for proxied audio/waveform endpoints
- Client: IDB-backed offline store (idb lib) with progress-tracked download
- UI: per-version offline download button with stream/original quality picker
- UI: /offline page with storage estimate and remove-all action
- Manifest: shortcuts for Dashboard + Offline-Tracks
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>