Fix Quality Scanner for Navidrome & expand ListenBrainz playlist limit

- Expose suffix, bitRate, and path fields on NavidromeTrack from the Subsonic API response
  - Add fallback in insert_or_update_media_track() to populate file_path and bitrate for Navidrome tracks, fixing the Quality Scanner
   returning 0 results
  - Increase ListenBrainz playlist cache limit from 4 to 25 per type
  - Add sub-tab grouping in the Recommendations tab (Weekly Jams, Weekly Exploration, Top Discoveries, etc.)

core/navidrome_client.py

@@ -113,6 +113,11 @@ class NavidromeTrack:
         self.userRating = navidrome_data.get('userRating')
         self.addedAt = self._parse_date(navidrome_data.get('created'))
 
+        # Subsonic API file/quality fields
+        self.suffix = navidrome_data.get('suffix')      # e.g. "flac", "mp3"
+        self.bitRate = navidrome_data.get('bitRate')     # e.g. 320
+        self.path = navidrome_data.get('path')           # e.g. "/music/Artist/Album/track.flac"
+
         self._album_id = navidrome_data.get('albumId', '')
         self._artist_id = navidrome_data.get('artistId', '')
 

database/music_database.py

@@ -1293,6 +1293,14 @@ class MusicDatabase:
                             part = media.parts[0]
                             file_path = getattr(part, 'file', None)
                         bitrate = getattr(media, 'bitrate', None)
+
+                # Fallback for Navidrome/Subsonic tracks
+                if file_path is None and hasattr(track_obj, 'path') and track_obj.path:
+                    file_path = track_obj.path
+                if bitrate is None and hasattr(track_obj, 'bitRate') and track_obj.bitRate:
+                    bitrate = track_obj.bitRate
+                if file_path is None and hasattr(track_obj, 'suffix') and track_obj.suffix:
+                    file_path = f"{track_obj.title}.{track_obj.suffix}"
                 
                 # Use INSERT OR REPLACE to handle duplicate IDs gracefully
                 cursor.execute("""