fix: correct track/disc defaults, forward extension metadata, and fix service ID display

- Default track/disc number to 0 (unknown) instead of 1, letting the
  backend use the service-provided value or skip the field entirely
- Add releaseDate to ExploreItem so explore downloads carry release info
- Pass discNumber and releaseDate from extension album/playlist tracks
- Fix isDeezer detection using service field instead of substring match
- Add _displayServiceTrackId() to properly strip prefixes for all services

lib/screens/home_tab.dart

@@ -1845,10 +1845,10 @@ class _HomeTabState extends ConsumerState<HomeTab>
       albumName: item.albumName ?? '',
       albumId: item.albumId,
       duration: item.durationMs ~/ 1000,
-      trackNumber: 1,
-      discNumber: 1,
+      trackNumber: null,
+      discNumber: null,
       isrc: null,
-      releaseDate: null,
+      releaseDate: item.releaseDate,
       coverUrl: item.coverUrl,
       source: item.providerId ?? 'spotify-web',
     );
@@ -4272,6 +4272,8 @@ class _ExtensionAlbumScreenState extends ConsumerState<ExtensionAlbumScreen> {
       isrc: data['isrc']?.toString(),
       duration: (durationMs / 1000).round(),
       trackNumber: data['track_number'] as int?,
+      discNumber: data['disc_number'] as int?,
+      releaseDate: data['release_date']?.toString(),
       source: widget.extensionId,
     );
   }
@@ -4429,6 +4431,8 @@ class _ExtensionPlaylistScreenState
       isrc: data['isrc']?.toString(),
       duration: (durationMs / 1000).round(),
       trackNumber: data['track_number'] as int?,
+      discNumber: data['disc_number'] as int?,
+      releaseDate: data['release_date']?.toString(),
       source: widget.extensionId,
     );
   }

lib/screens/track_metadata_screen.dart

@@ -552,6 +552,36 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
     return parsed;
   }
 
+  String _displayServiceTrackId(String value) {
+    final raw = value.trim();
+    if (raw.isEmpty) return raw;
+    final spotifyTrackIdPattern = RegExp(r'^[A-Za-z0-9]{22}$');
+
+    if (raw.startsWith('deezer:')) return raw.substring('deezer:'.length);
+    if (raw.startsWith('tidal:')) return raw.substring('tidal:'.length);
+    if (raw.startsWith('qobuz:')) return raw.substring('qobuz:'.length);
+    if (spotifyTrackIdPattern.hasMatch(raw)) return raw;
+
+    if (raw.startsWith('spotify:')) {
+      final last = raw.split(':').last.trim();
+      if (spotifyTrackIdPattern.hasMatch(last)) return last;
+      return raw;
+    }
+
+    final uri = Uri.tryParse(raw);
+    if (uri != null &&
+        uri.host.contains('spotify.com') &&
+        uri.pathSegments.length >= 2 &&
+        uri.pathSegments.first == 'track') {
+      final candidate = uri.pathSegments[1].trim();
+      if (spotifyTrackIdPattern.hasMatch(candidate)) {
+        return candidate;
+      }
+    }
+
+    return raw;
+  }
+
   String? get _displayAudioQuality {
     final fileName = _extractFileNameFromPathOrUri(cleanFilePath);
     final fileExt = fileName.contains('.')
@@ -1102,8 +1132,9 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
   Future<void> _openServiceUrl(BuildContext context) async {
     if (_spotifyId == null) return;
 
-    final isDeezer = _spotifyId!.contains('deezer');
-    final rawId = _spotifyId!.replaceAll('deezer:', '');
+    final isDeezer =
+        _service.toLowerCase() == 'deezer' || _spotifyId!.startsWith('deezer:');
+    final rawId = _displayServiceTrackId(_spotifyId!);
     final svc = _service.toLowerCase();
 
     String webUrl;
@@ -1192,8 +1223,9 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
     ];
 
     if (!_isLocalItem && _spotifyId != null && _spotifyId!.isNotEmpty) {
-      final isDeezer = _spotifyId!.contains('deezer');
-      final cleanId = _spotifyId!.replaceAll('deezer:', '');
+      final isDeezer =
+          _service.toLowerCase() == 'deezer' || _spotifyId!.startsWith('deezer:');
+      final cleanId = _displayServiceTrackId(_spotifyId!);
       String idLabel;
       if (isDeezer) {
         idLabel = 'Deezer ID';