_sanitize_context_values passed empty strings through _sanitize_filename
which converts '' to '_' (empty-name fallback). Template $album ($year)
became Album (_) instead of Album () which the cleanup regex couldn't
match. Now preserves empty strings so the existing () cleanup works.
- Add _fix_path_mismatch handler so fixing Library Reorganize dry-run
findings actually moves files (was returning 400 with no handler)
- Add path_mismatch to fixable_types and _execute_fix handler map
- Add recent_releases and wishlist_tracks as year sources in
_load_album_years to cover more playlist-synced tracks missing years
- Add sys and json imports needed by new code
Playlist-synced tracks often have no year in file tags or the DB albums
table. Now checks discovery_pool release_date as a second DB source,
then batch-lookups remaining missing years from the user's active
metadata source (Spotify/iTunes/Deezer) capped at 50 API calls.
- Add null guard for soulseek_client in test-connection endpoint (#190)
- Fix single_album_dedup query: use al.record_type and al.track_count
(al.album_type and al.total_tracks don't exist on main albums table)
- Fix library reorganize missing year: pre-load album years from DB as
fallback when file tags lack the date field (common with playlist syncs)
- DB path update uses suffix matching when exact match fails, so server
paths (/mnt/musicBackup/...) are found and updated after local moves
- Escape LIKE wildcards in artist/album names to prevent false matches
- Move album-level sidecars (cover.jpg, folder.jpg, etc.) alongside audio
- Post-pass sweep moves all remaining sidecars from emptied directories
- Multi-disc albums place album art in album root, not disc subfolders
