refactor: remove unused convenience APIs

lib/connection/connection_registry.dart

@@ -118,13 +118,6 @@ class ConnectionRegistry {
     return all.whereType<PlexAccountConnection>().toList();
   }
 
-  /// All Jellyfin connections in insertion order. Symmetric helper to
-  /// [listPlexAccounts].
-  Future<List<JellyfinConnection>> listJellyfin() async {
-    final all = await list();
-    return all.whereType<JellyfinConnection>().toList();
-  }
-
   /// Lookup a [PlexAccountConnection] by id. Returns `null` if no row
   /// matches OR the row exists but isn't a Plex account.
   Future<PlexAccountConnection?> getPlexAccount(String id) async {
@@ -132,13 +125,6 @@ class ConnectionRegistry {
     return c is PlexAccountConnection ? c : null;
   }
 
-  /// Lookup a [JellyfinConnection] by id. Returns `null` if no row matches
-  /// OR the row exists but isn't a Jellyfin connection.
-  Future<JellyfinConnection?> getJellyfin(String id) async {
-    final c = await get(id);
-    return c is JellyfinConnection ? c : null;
-  }
-
   Future<Connection?> _rowToConnection(ConnectionRow row) async {
     try {
       final json = jsonDecode(row.configJson) as Map<String, dynamic>;

lib/media/media_library.dart

@@ -47,32 +47,4 @@ class MediaLibrary {
   });
 
   String get globalKey => serverId != null ? buildGlobalKey(ServerId(serverId!), id) : id;
-
-  MediaLibrary copyWith({
-    String? id,
-    MediaBackend? backend,
-    String? title,
-    MediaKind? kind,
-    String? language,
-    int? updatedAt,
-    int? createdAt,
-    bool? hidden,
-    bool? isShared,
-    String? serverId,
-    String? serverName,
-  }) {
-    return MediaLibrary(
-      id: id ?? this.id,
-      backend: backend ?? this.backend,
-      title: title ?? this.title,
-      kind: kind ?? this.kind,
-      language: language ?? this.language,
-      updatedAt: updatedAt ?? this.updatedAt,
-      createdAt: createdAt ?? this.createdAt,
-      hidden: hidden ?? this.hidden,
-      isShared: isShared ?? this.isShared,
-      serverId: serverId ?? this.serverId,
-      serverName: serverName ?? this.serverName,
-    );
-  }
 }

lib/mixins/controller_disposer_mixin.dart

@@ -12,11 +12,6 @@ mixin ControllerDisposerMixin<T extends StatefulWidget> on State<T> {
     return controller;
   }
 
-  TextEditingController registerTextEditingController(TextEditingController controller) {
-    _textEditingControllers.add(controller);
-    return controller;
-  }
-
   @override
   void dispose() {
     for (final controller in _textEditingControllers.reversed) {

lib/models/audio_quality_preset.dart

@@ -28,8 +28,4 @@ enum AudioQualityPreset {
     }
     return AudioQualityPreset.original;
   }
-
-  /// Order shared by every picker surface: [original] first, then capped
-  /// presets highest-bitrate first.
-  static final List<AudioQualityPreset> displayOrder = List.unmodifiable(values);
 }

lib/models/external_player_models.dart

@@ -1,4 +1,3 @@
-import 'dart:convert';
 import 'dart:io';
 
 import 'package:url_launcher/url_launcher.dart';
@@ -66,11 +65,6 @@ class ExternalPlayer {
     if (customType != null) 'customType': customType == CustomPlayerType.urlScheme ? 'urlScheme' : 'command',
   };
 
-  String toJsonString() => json.encode(toJson());
-
-  static ExternalPlayer fromJsonString(String jsonString) =>
-      ExternalPlayer.fromJson(json.decode(jsonString) as Map<String, dynamic>);
-
   @override
   bool operator ==(Object other) =>
       identical(this, other) || other is ExternalPlayer && runtimeType == other.runtimeType && id == other.id;

lib/mpv/font_loader.dart

@@ -45,6 +45,4 @@ class SubtitleFontLoader {
   }
 
   static String get fontName => _fontName;
-
-  static String get fontAssetPath => _fontAssetPath;
 }

lib/mpv/models.dart

@@ -47,12 +47,6 @@ sealed class AudioTrack with _$AudioTrack {
   static const off = AudioTrack(id: 'no', title: 'Off');
 
   int? get channelsCount => channels;
-
-  String get displayName {
-    if (title != null && title!.isNotEmpty) return title!;
-    if (language != null && language!.isNotEmpty) return language!;
-    return 'Track $id';
-  }
 }
 
 @freezed
@@ -91,13 +85,6 @@ sealed class SubtitleTrack with _$SubtitleTrack {
   static const auto = SubtitleTrack(id: 'auto', title: 'Auto');
 
   static const off = SubtitleTrack(id: 'no', title: 'Off');
-
-  String get displayName {
-    if (title != null && title!.isNotEmpty) return title!;
-    if (language != null && language!.isNotEmpty) return language!;
-    if (isExternal) return 'External';
-    return 'Track $id';
-  }
 }
 
 @Freezed(toStringOverride: false)

lib/services/jellyfin_api_cache.dart

@@ -73,8 +73,6 @@ class JellyfinApiCache extends ApiCache {
   /// [ApiCache.isPinned]'s identical Dart signature.
   Future<bool> isPinnedItemId(ServerId serverId, String itemId) => hasPinnedMatching(_itemPattern(serverId, itemId));
 
-  Future<Set<String>> getPinnedItemIds(ServerId serverId) => extractPinnedIds(serverId, _itemKeyPattern);
-
   /// Fetch and parse a [MediaItem] from cache.
   ///
   /// Returns `null` when no matching row is cached, the row's JSON is

lib/services/plex_mappers.dart

@@ -777,8 +777,6 @@ class PlexMetadataDto {
 
   String get globalKey => serverId != null ? buildGlobalKey(ServerId(serverId!), ratingKey) : ratingKey;
 
-  bool get isLibrarySection => key != null && key!.startsWith('/library/sections/');
-
   bool get isUnmatched => guid == null || guid!.isEmpty || guid!.contains(_unmatchedAgentMarker);
 
   /// Top-level scalar fields surface as a plain Plex JSON map. Used by the

lib/services/shader_asset_loader.dart

@@ -257,24 +257,6 @@ class ShaderAssetLoader {
     }
   }
 
-  /// Pre-extract all shader files to the cache.
-  /// Call this at startup to avoid extraction delay during playback.
-  static Future<void> preloadShaders() async {
-    try {
-      await _extractShader(_nvscalerShader);
-
-      for (final shaderPath in _artcnnShaders.values) {
-        await _extractShader(shaderPath);
-      }
-
-      for (final shaderPath in _anime4kShaders.values) {
-        await _extractShader(shaderPath);
-      }
-    } catch (e, st) {
-      appLogger.w('Failed to preload shaders', error: e, stackTrace: st);
-    }
-  }
-
   /// Clear cached shader directory reference.
   /// Call when clearing app cache.
   static void clearCache() {

lib/services/update_service.dart

@@ -109,11 +109,6 @@ class UpdateService {
     return prefs.getString(_keySkippedVersion);
   }
 
-  static Future<void> clearSkippedVersion() async {
-    final prefs = await BaseSharedPreferencesService.sharedCache();
-    await prefs.remove(_keySkippedVersion);
-  }
-
   /// Check if cooldown period has passed since last check
   static Future<bool> shouldCheckForUpdates() async {
     final prefs = await BaseSharedPreferencesService.sharedCache();

lib/utils/media_image_helper.dart

@@ -275,15 +275,6 @@ class MediaImageHelper {
     return true;
   }
 
-  /// Optimized URL for hero/background art ([ImageType.art]).
-  static String heroArtUrl({
-    required MediaServerClient? client,
-    required String? thumbPath,
-    required BuildContext context,
-    required double containerWidth,
-    required double containerHeight,
-  }) => _typedUrl(client, thumbPath, context, containerWidth, containerHeight, ImageType.art);
-
   /// Optimized URL for clear-logo overlays ([ImageType.logo]).
   static String logoUrl({
     required MediaServerClient? client,

lib/utils/media_server_http_client.dart

@@ -249,9 +249,6 @@ class MediaServerHttpClient {
     }
   }
 
-  /// Send a streamed request (for image cache etc).
-  Future<http.StreamedResponse> sendStreamed(http.BaseRequest request) => _client.send(request);
-
   void close() {
     _closing = true;
     _abortActiveRequests();

lib/widgets/settings_builder.dart

@@ -9,7 +9,6 @@ import '../services/settings_service.dart';
 /// [SettingValueBuilder] / [SettingsBuilder] so only the dependent subtree rebuilds.
 extension SettingsContextRead on BuildContext {
   T settingsRead<T>(Pref<T> pref) => SettingsService.instance.read(pref);
-  Future<void> settingsWrite<T>(Pref<T> pref, T value) => SettingsService.instance.write(pref, value);
 }
 
 /// Rebuild [builder] when any of [prefs] changes. Use when a widget's output

lib/widgets/video_controls/desktop_video_controls.dart

@@ -295,12 +295,6 @@ class DesktopVideoControlsState extends State<DesktopVideoControls> {
     _timelineFocusNode.requestFocus();
   }
 
-  /// Get focus node for volume control
-  FocusNode get volumeFocusNode => _volumeFocusNode;
-
-  /// Get focus nodes for track controls
-  List<FocusNode> get trackControlFocusNodes => _trackControlFocusNodes;
-
   /// Hide content strip (called by parent when controls hide)
   void hideContentStrip() {
     if (_contentStripVisible) {