refactor(services): remove members with no caller

Delete Dart members that have no reference in lib, test or integration_test:
unused player configuration helpers and event streams, two PlatformBridge
wrappers, database and export helpers, the unused global logger and the
now pointless 'hide log' imports.

lib/models/extension.dart

@@ -588,8 +588,6 @@ class ExtensionHealthStatus {
           [],
     );
   }
-
-  bool get isSupported => status != 'unsupported';
 }
 
 class ExtensionHealthCheckStatus {

lib/providers/download_history_provider.dart

@@ -9,7 +9,7 @@ import 'package:spotiflac_android/models/track.dart';
 import 'package:spotiflac_android/services/platform_bridge.dart';
 import 'package:spotiflac_android/services/history_database.dart';
 import 'package:spotiflac_android/services/history_maintenance.dart';
-import 'package:spotiflac_android/utils/logger.dart' hide log;
+import 'package:spotiflac_android/utils/logger.dart';
 import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/utils/string_utils.dart';
 import 'package:spotiflac_android/utils/audio_format_utils.dart';

lib/providers/download_queue_provider.dart

@@ -37,7 +37,7 @@ import 'package:spotiflac_android/services/replaygain_service.dart';
 import 'package:spotiflac_android/services/album_replaygain_readiness.dart';
 import 'package:spotiflac_android/services/notification_service.dart';
 import 'package:spotiflac_android/services/verification_notification.dart';
-import 'package:spotiflac_android/utils/logger.dart' hide log;
+import 'package:spotiflac_android/utils/logger.dart';
 import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/utils/string_utils.dart';
 import 'package:spotiflac_android/utils/artist_utils.dart';

lib/providers/library_collections_provider.dart

@@ -778,50 +778,12 @@ class LibraryCollectionsNotifier extends Notifier<LibraryCollectionsState> {
     _invalidatePlaylistPickerSummaries();
   });
 
-  /// Returns the full collections snapshot (wishlist, loved, playlists,
-  /// favorite artists) for a backup, ensuring data is loaded first.
-  Future<Map<String, dynamic>> exportCollections() async {
-    await _ensureLoaded();
-    await ensurePlaylistsLoaded(state.playlists.map((playlist) => playlist.id));
-    return exportLibraryCollectionsState(state);
-  }
-
   Future<String> exportCollectionsJson() async {
     await _ensureLoaded();
     await ensurePlaylistsLoaded(state.playlists.map((playlist) => playlist.id));
     return exportLibraryCollectionsJson(state);
   }
 
-  /// Exports custom playlist cover images as base64, keyed by playlist id.
-  /// Each value contains the original file extension and the encoded bytes so a
-  /// restore on another device can recreate the cover files.
-  Future<Map<String, Map<String, String>>> exportPlaylistCovers() async {
-    await _ensureLoaded();
-    final covers = <String, Map<String, String>>{};
-    final playlists = List<UserPlaylistCollection>.of(state.playlists);
-    for (final playlist in playlists) {
-      var path = playlist.coverImagePath;
-      if (path == null || path.isEmpty) continue;
-      try {
-        if (await _playlistCoverNeedsNormalization(path)) {
-          await setPlaylistCover(playlist.id, path);
-          path = state.playlistById(playlist.id)?.coverImagePath ?? path;
-        }
-        final file = File(path);
-        if (!await file.exists()) continue;
-        final bytes = await file.readAsBytes();
-        if (bytes.isEmpty) continue;
-        covers[playlist.id] = {
-          'ext': p.extension(path).toLowerCase(),
-          'data': base64Encode(bytes),
-        };
-      } catch (_) {
-        // Skip unreadable cover; the rest of the backup still succeeds.
-      }
-    }
-    return covers;
-  }
-
   /// Returns cover file references for the streaming ZIP backup format. The
   /// backup writer reads each file directly instead of materializing every
   /// image as base64 in memory.
@@ -852,8 +814,9 @@ class LibraryCollectionsNotifier extends Notifier<LibraryCollectionsState> {
 
   /// Replaces all collections (wishlist, loved, playlists, favorite artists)
   /// with the contents of a backup. [collectionsJson] uses the
-  /// [LibraryCollectionsState.toJson] shape; [coverImages] is the map produced
-  /// by [exportPlaylistCovers]. Cover images are rewritten into this device's
+  /// [LibraryCollectionsState.toJson] shape; [coverImages] is the backup's
+  /// playlist cover map: `ext` plus either a `path` to an extracted file or
+  /// legacy base64 `data`. Cover images are rewritten into this device's
   /// covers directory and their paths fixed up before persisting.
   Future<void> restoreFromBackup(
     Map<String, dynamic> collectionsJson, {

lib/providers/settings_provider.dart

@@ -1073,16 +1073,6 @@ class SettingsNotifier extends Notifier<AppSettings> {
     _saveSettings();
   }
 
-  void setLocalLibraryPath(String path) {
-    state = state.copyWith(localLibraryPath: path);
-    _saveSettings();
-  }
-
-  void setLocalLibraryBookmark(String bookmark) {
-    state = state.copyWith(localLibraryBookmark: bookmark);
-    _saveSettings();
-  }
-
   void setLocalLibraryPathAndBookmark(String path, String bookmark) {
     state = state.copyWith(
       localLibraryPath: path,

lib/services/history_database.dart

@@ -1091,18 +1091,6 @@ class HistoryDatabase {
     return results;
   }
 
-  Future<void> deleteById(String id) async {
-    final db = await database;
-    await db.transaction((txn) async {
-      await txn.delete(
-        'history_path_keys',
-        where: 'item_id = ?',
-        whereArgs: [id],
-      );
-      await txn.delete('history', where: 'id = ?', whereArgs: [id]);
-    });
-  }
-
   Future<void> clearAll() async {
     final db = await database;
     await db.transaction((txn) async {

lib/services/library_database.dart

@@ -998,21 +998,6 @@ class LibraryDatabase {
     );
   }
 
-  Future<List<String>> getCoverPaths({int? limit, int? offset}) async {
-    final db = await database;
-    final rows = await db.query(
-      'library',
-      columns: ['cover_path'],
-      where: 'cover_path IS NOT NULL AND cover_path != ""',
-      limit: limit,
-      offset: offset,
-    );
-    return rows
-        .map((row) => row['cover_path'] as String?)
-        .whereType<String>()
-        .toList(growable: false);
-  }
-
   /// Physical copies sharing one ISRC, excluding inactive NAS sources and
   /// alternate index/URI references to the same file. Best quality comes first.
   Future<List<IsrcDuplicateGroup>> findIsrcDuplicateGroups() async {

lib/services/m3u_playlist_service.dart

@@ -153,16 +153,6 @@ class M3uPlaylistService {
     }
   }
 
-  /// Writes the playlist to a shareable temp file named after the playlist.
-  static Future<File> writeExportFile(
-    String playlistName,
-    String content,
-  ) async {
-    final file = await _exportFile(playlistName);
-    await file.writeAsString(content);
-    return file;
-  }
-
   /// Serialize directly to a native worker file; Flutter only sends the fields
   /// represented in M3U, rather than an encoded playlist string.
   static Future<File> writeExportEntries(

lib/services/music_player_service.dart

@@ -63,13 +63,6 @@ void configurePlaybackNotification({
 Future<void> restoreMusicAudioSessionAfterVideo() async =>
     musicPlayerRuntime.handler?.restoreIosNowPlaying();
 
-/// Enables/disables ReplayGain volume normalization and re-applies it to the
-/// track currently playing.
-void setPlaybackNormalizationEnabled(bool enabled) =>
-    musicPlayerRuntime.configure(
-      musicPlayerRuntime.settings.copyWith(playbackNormalization: enabled),
-    );
-
 void setPlaybackAutomationOptions({
   required bool enabled,
   required bool pauseOnMute,
@@ -101,20 +94,6 @@ void setUsbBitPerfectEnabled(bool enabled) => musicPlayerRuntime.configure(
   musicPlayerRuntime.settings.copyWith(usbBitPerfect: enabled),
 );
 
-void setUsbOutputOptions({
-  required bool direct,
-  required bool allowDop,
-  bool allowFixedVolume = false,
-  bool dapExclusive = false,
-}) => musicPlayerRuntime.configure(
-  musicPlayerRuntime.settings.copyWith(
-    usbDirect: direct,
-    usbDsdOverPcm: allowDop,
-    usbAllowFixedVolume: allowFixedVolume,
-    dapExclusive: dapExclusive,
-  ),
-);
-
 /// Gain and rate the player applies to the current track.
 class PlaybackProcessing {
   const PlaybackProcessing({
@@ -2287,8 +2266,6 @@ class MusicPlayerHandler extends BaseAudioHandler
   }
 }
 
-MusicPlayerHandler? get musicPlayerHandler => musicPlayerRuntime.handler;
-
 Future<MusicPlayerHandler> initMusicPlayer() => musicPlayerRuntime.initialize();
 
 /// Restores the last persisted playback session (if any) into a freshly
@@ -2397,10 +2374,3 @@ Future<void> restorePlaybackSession(MusicPlayerRuntime runtime) async {
     _log.w('Failed to restore playback session: $e');
   }
 }
-
-Stream<MediaItem?> musicPlayerMediaItemEvents() =>
-    musicPlayerRuntime.mediaItemEvents();
-Stream<PlaybackState> musicPlayerPlaybackStateEvents() =>
-    musicPlayerRuntime.playbackStateEvents();
-Stream<List<MediaItem>> musicPlayerQueueEvents() =>
-    musicPlayerRuntime.queueEvents();

lib/services/platform_bridge.dart

@@ -1262,17 +1262,6 @@ class PlatformBridge {
     return result as bool? ?? false;
   }
 
-  static Future<bool> shareMultipleContentUris(
-    List<String> uris, {
-    String title = '',
-  }) async {
-    final result = await _channel.invokeMethod('shareMultipleContentUris', {
-      'uris': uris,
-      'title': title,
-    });
-    return result as bool? ?? false;
-  }
-
   static Future<String> getLyricsLRC(
     String spotifyId,
     String trackName,
@@ -1372,12 +1361,6 @@ class PlatformBridge {
     });
   }
 
-  static Future<List<Map<String, dynamic>>>
-  getAvailableLyricsProviders() async {
-    final result = await _channel.invokeMethod('getAvailableLyricsProviders');
-    return _decodeMapListResult(result, 'getAvailableLyricsProviders');
-  }
-
   /// Sets advanced lyrics fetch options used by provider-specific integrations.
   static Future<void> setLyricsFetchOptions(
     Map<String, dynamic> options,
@@ -2727,18 +2710,6 @@ class PlatformBridge {
     );
   }
 
-  static List<Map<String, dynamic>> _decodeMapListResult(
-    dynamic result,
-    String method,
-  ) {
-    return _decodeRequiredListResult(result, method).map((entry) {
-      if (entry is Map) return entry.cast<String, dynamic>();
-      throw FormatException(
-        'Expected map entry from $method, got ${entry.runtimeType}',
-      );
-    }).toList();
-  }
-
   static Future<List<Map<String, dynamic>>> _decodeMapListResultAsync(
     dynamic result,
     String method,

lib/utils/logger.dart

@@ -468,18 +468,6 @@ class BufferedOutput extends LogOutput {
   }
 }
 
-final log = Logger(
-  printer: PrettyPrinter(
-    methodCount: 0,
-    errorMethodCount: 5,
-    lineLength: 80,
-    colors: true,
-    printEmojis: false,
-    dateTimeFormat: DateTimeFormat.none,
-  ),
-  level: Level.debug,
-);
-
 class AppLogger {
   final String _tag;
   late final Logger? _logger;