Adds a new Last.fm Radio section to the Discover page that lets users
search a track on Last.fm, generate a similar-tracks playlist, and run
it through the existing discovery/download/sync pipeline. Also generates
playlists automatically from top listening history during watchlist scans
(max once per week).
- core/lastfm_client.py: Add get_similar_tracks() using track.getsimilar
- core/listenbrainz_manager.py: Add save_lastfm_radio_playlist() with
deterministic MBID (MD5 seed), cleanup limit of 5 for lastfm_radio type
- web_server.py: Add /api/lastfm/configured, /api/lastfm/search/tracks,
/api/lastfm/radio/generate, /api/discover/listenbrainz/lastfm-radio;
fix playlist['name'] KeyError in discovery worker that was resetting
phase back to 'fresh' after completion
- core/watchlist_scanner.py: Add _generate_lastfm_radio_playlists() with
weekly throttle, called at end of scan_all_watchlist_artists()
- webui/index.html: Add #lastfm-radio-section above ListenBrainz section,
hidden unless Last.fm API key is configured
- webui/static/script.js: Search/generation/card-load functions; fix
discovery modal labels (Last.fm Radio vs ListenBrainz), description
update on completion, belt-and-suspenders completion handling inside
updateYouTubeDiscoveryModal; fix album/duration display for tracks
without metadata; music note SVG placeholder for missing art
- webui/static/style.css: Styles for search bar, dropdown, result rows
251c27e006