Added an Import feature that lets users process local audio files through the existing post-processing pipeline (metadata enrichment, cover art, lyrics, library organization). Files are placed in a configurable Staging folder and imported via two modes: Album mode (search/match files to a Spotify tracklist) and Singles mode (select individual files for processing). Includes auto-suggested albums based on staging folder contents and real-time per-track progress tracking.
- Add global discovery_match_cache table to cache successful track matches
(title+artist+provider -> matched result) across all discovery sources
- Cache check before API search in YouTube, ListenBrainz, Tidal, and Beatport
discovery workers; cache write after high-confidence matches
- Re-discovering playlists or overlapping tracks across sources skips API lookups
- Fix Spotify tab sidebar forcing 2-column grid on mobile via inline JS styles
- Add mobile responsive styles for Spotify playlist cards (stack layout vertically)
