feat: add totalTracks to Track model and refine EP/single classification (#202)

lib/providers/download_queue_provider.dart

@@ -2362,6 +2362,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
       deezerId: baseTrack.deezerId,
       availability: baseTrack.availability,
       albumType: baseTrack.albumType,
+      totalTracks: baseTrack.totalTracks,
       source: baseTrack.source,
     );
   }
@@ -3274,6 +3275,8 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
                 albumType:
                     (data['album_type'] as String?) ??
                     trackToDownload.albumType,
+                totalTracks:
+                    data['total_tracks'] as int? ?? trackToDownload.totalTracks,
                 source: trackToDownload.source,
               );
               _log.d(
@@ -3488,6 +3491,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
                 deezerId: deezerTrackId,
                 availability: trackToDownload.availability,
                 albumType: trackToDownload.albumType,
+                totalTracks: trackToDownload.totalTracks,
                 source: trackToDownload.source,
               );
               _log.d(

lib/providers/track_provider.dart

@@ -816,6 +816,7 @@ class TrackNotifier extends Notifier<TrackState> {
         discNumber: track.discNumber,
         releaseDate: track.releaseDate,
         albumType: track.albumType,
+        totalTracks: track.totalTracks,
         source: track.source,
         availability: ServiceAvailability(
           tidal: availability['tidal'] as bool? ?? false,
@@ -897,6 +898,8 @@ class TrackNotifier extends Notifier<TrackState> {
       trackNumber: data['track_number'] as int?,
       discNumber: data['disc_number'] as int?,
       releaseDate: data['release_date'] as String?,
+      albumType: data['album_type'] as String?,
+      totalTracks: data['total_tracks'] as int?,
     );
   }
 
@@ -919,6 +922,7 @@ class TrackNotifier extends Notifier<TrackState> {
       trackNumber: data['track_number'] as int?,
       discNumber: data['disc_number'] as int?,
       releaseDate: data['release_date']?.toString(),
+      totalTracks: data['total_tracks'] as int?,
       source:
           source ??
           data['source']?.toString() ??