Sync rehydration: after loading Deezer ARL playlists, checks each
for active syncs via /api/sync/status and re-attaches polling with
live card updates. Download rehydration: rehydrateModal now handles
deezer_arl_ playlist IDs, and openDownloadMissingModal routes cache
misses to the correct ARL endpoint. Fix All now prompts for dead
file action.
Album data caching: get_playlist_tracks now checks the metadata
cache before fetching album release dates from the Deezer API.
Cache hits are instant, misses are fetched and stored for future
use across all playlists. Import fixed from core.metadata_cache
instead of web_server to avoid circular dependency.
New "Deezer" tab on sync page shows authenticated user's playlists,
identical to the Spotify tab pattern — same card layout, details
modal with track list, sync button, and download missing tracks
flow. Existing URL import renamed to "Deezer Link" tab (unchanged).
Backend: get_user_playlists() and get_playlist_tracks() on the
download client fetch via public API with ARL session cookies.
Album release dates batch-fetched for $year template variable.
Three new endpoints: arl-status, arl-playlists, arl-playlist/<id>.
Frontend: cards use Spotify-identical HTML structure with live sync
status, progress indicators, and View Progress/Results buttons.
Downloads reuse openDownloadMissingModal with zero modifications.
Track data cached on first open, instant on subsequent clicks.
Deezer client imports config_manager locally in __init__ and stores
it as self._config, unlike the other clients which import at module
level. The allow_fallback line was referencing the wrong name.
Each streaming source (Tidal, Qobuz, HiFi, Deezer) now has an "Allow
quality fallback" checkbox in Settings. When disabled, the source only
tries the exact quality selected — if unavailable, it skips and lets
the orchestrator try the next source. Default is ON (current behavior).
