chore: cleanup unused code and dead imports

lib/models/download_item.dart

@@ -3,23 +3,21 @@ import 'package:spotiflac_android/models/track.dart';
 
 part 'download_item.g.dart';
 
-/// Download status enum
 enum DownloadStatus {
   queued,
   downloading,
-  finalizing, // Embedding metadata, cover, lyrics
+  finalizing,
   completed,
   failed,
   skipped,
 }
 
-/// Error type enum for better error handling
 enum DownloadErrorType {
   unknown,
-  notFound,    // Track not found on any service
-  rateLimit,   // Rate limited by service
-  network,     // Network/connection error
-  permission,  // File/folder permission error
+  notFound,
+  rateLimit,
+  network,
+  permission,
 }
 
 @JsonSerializable()
@@ -29,7 +27,7 @@ class DownloadItem {
   final String service;
   final DownloadStatus status;
   final double progress;
-  final double speedMBps; // Download speed in MB/s
+  final double speedMBps;
   final String? filePath;
   final String? error;
   final DownloadErrorType? errorType;
@@ -78,7 +76,6 @@ class DownloadItem {
     );
   }
 
-  /// Get user-friendly error message based on error type
   String get errorMessage {
     if (error == null) return '';
     

lib/models/settings.dart

@@ -12,27 +12,27 @@ class AppSettings {
   final bool embedLyrics;
   final bool maxQualityCover;
   final bool isFirstLaunch;
-  final int concurrentDownloads; // 1 = sequential (default), max 3
-  final bool checkForUpdates; // Check for updates on app start
-  final String updateChannel; // stable, preview
-  final bool hasSearchedBefore; // Hide helper text after first search
-  final String folderOrganization; // none, artist, album, artist_album
-  final String historyViewMode; // list, grid
-  final String historyFilterMode; // all, albums, singles
-  final bool askQualityBeforeDownload; // Show quality picker before each download
-  final String spotifyClientId; // Custom Spotify client ID (empty = use default)
-  final String spotifyClientSecret; // Custom Spotify client secret (empty = use default)
-  final bool useCustomSpotifyCredentials; // Whether to use custom credentials (if set)
-  final String metadataSource; // spotify, deezer - source for search and metadata
-  final bool enableLogging; // Enable detailed logging for debugging
-  final bool useExtensionProviders; // Use extension providers for downloads when available
-  final String? searchProvider; // null/empty = default (Deezer/Spotify), otherwise extension ID
-  final bool separateSingles; // Separate singles/EPs into their own folder
-  final String albumFolderStructure; // artist_album, album_only, artist_year_album, year_album
-  final bool showExtensionStore; // Show Extension Store tab in navigation
-  final String locale; // App language: 'system', 'en', 'id', etc.
-  final bool enableMp3Option; // Enable MP3 quality option (default off, requires FFmpeg conversion)
-  final String lyricsMode; // embed, external, both - how to save lyrics
+  final int concurrentDownloads;
+  final bool checkForUpdates;
+  final String updateChannel;
+  final bool hasSearchedBefore;
+  final String folderOrganization;
+  final String historyViewMode;
+  final String historyFilterMode;
+  final bool askQualityBeforeDownload;
+  final String spotifyClientId;
+  final String spotifyClientSecret;
+  final bool useCustomSpotifyCredentials;
+  final String metadataSource;
+  final bool enableLogging;
+  final bool useExtensionProviders;
+  final String? searchProvider;
+  final bool separateSingles;
+  final String albumFolderStructure;
+  final bool showExtensionStore;
+  final String locale;
+  final bool enableMp3Option;
+  final String lyricsMode;
 
   const AppSettings({
     this.defaultService = 'tidal',
@@ -43,27 +43,27 @@ class AppSettings {
     this.embedLyrics = true,
     this.maxQualityCover = true,
     this.isFirstLaunch = true,
-    this.concurrentDownloads = 1, // Default: sequential (off)
-    this.checkForUpdates = true, // Default: enabled
-    this.updateChannel = 'stable', // Default: stable releases only
-    this.hasSearchedBefore = false, // Default: show helper text
-    this.folderOrganization = 'none', // Default: no folder organization
-    this.historyViewMode = 'grid', // Default: grid view
-    this.historyFilterMode = 'all', // Default: show all
-    this.askQualityBeforeDownload = true, // Default: ask quality before download
-    this.spotifyClientId = '', // Default: use built-in credentials
-    this.spotifyClientSecret = '', // Default: use built-in credentials
-    this.useCustomSpotifyCredentials = true, // Default: use custom if set
-    this.metadataSource = 'deezer', // Default: Deezer (no rate limit)
-    this.enableLogging = false, // Default: disabled for performance
-    this.useExtensionProviders = true, // Default: use extensions when available
-    this.searchProvider, // Default: null (use Deezer/Spotify)
-    this.separateSingles = false, // Default: disabled
-    this.albumFolderStructure = 'artist_album', // Default: Albums/Artist/Album
-    this.showExtensionStore = true, // Default: show store
-    this.locale = 'system', // Default: follow system language
-    this.enableMp3Option = false, // Default: disabled
-    this.lyricsMode = 'embed', // Default: embed lyrics into file
+    this.concurrentDownloads = 1,
+    this.checkForUpdates = true,
+    this.updateChannel = 'stable',
+    this.hasSearchedBefore = false,
+    this.folderOrganization = 'none',
+    this.historyViewMode = 'grid',
+    this.historyFilterMode = 'all',
+    this.askQualityBeforeDownload = true,
+    this.spotifyClientId = '',
+    this.spotifyClientSecret = '',
+    this.useCustomSpotifyCredentials = true,
+    this.metadataSource = 'deezer',
+    this.enableLogging = false,
+    this.useExtensionProviders = true,
+    this.searchProvider,
+    this.separateSingles = false,
+    this.albumFolderStructure = 'artist_album',
+    this.showExtensionStore = true,
+    this.locale = 'system',
+    this.enableMp3Option = false,
+    this.lyricsMode = 'embed',
   });
 
   AppSettings copyWith({
@@ -90,7 +90,7 @@ class AppSettings {
     bool? enableLogging,
     bool? useExtensionProviders,
     String? searchProvider,
-    bool clearSearchProvider = false, // Set to true to clear searchProvider to null
+    bool clearSearchProvider = false,
     bool? separateSingles,
     String? albumFolderStructure,
     bool? showExtensionStore,

lib/models/theme_settings.dart

@@ -9,7 +9,6 @@ const String kUseAmoledKey = 'use_amoled';
 /// Default Spotify green color for fallback
 const int kDefaultSeedColor = 0xFF1DB954;
 
-/// Theme settings model for Material Expressive 3
 class ThemeSettings {
   final ThemeMode themeMode;
   final bool useDynamicColor;
@@ -23,10 +22,8 @@ class ThemeSettings {
     this.useAmoled = false,
   });
 
-  /// Get seed color as Color object
   Color get seedColor => Color(seedColorValue);
 
-  /// Create a copy with updated values
   ThemeSettings copyWith({
     ThemeMode? themeMode,
     bool? useDynamicColor,
@@ -41,7 +38,6 @@ class ThemeSettings {
     );
   }
 
-  /// Convert to JSON map for persistence
   Map<String, dynamic> toJson() => {
         kThemeModeKey: themeMode.name,
         kUseDynamicColorKey: useDynamicColor,
@@ -49,7 +45,6 @@ class ThemeSettings {
         kUseAmoledKey: useAmoled,
       };
 
-  /// Create from JSON map
   factory ThemeSettings.fromJson(Map<String, dynamic> json) {
     return ThemeSettings(
       themeMode: _themeModeFromString(json[kThemeModeKey] as String?),
@@ -74,7 +69,6 @@ class ThemeSettings {
       themeMode.hashCode ^ useDynamicColor.hashCode ^ seedColorValue.hashCode ^ useAmoled.hashCode;
 }
 
-/// Helper to convert string to ThemeMode
 ThemeMode _themeModeFromString(String? value) {
   if (value == null) return ThemeMode.system;
   return ThemeMode.values.firstWhere(

lib/models/track.dart

@@ -2,7 +2,6 @@ import 'package:json_annotation/json_annotation.dart';
 
 part 'track.g.dart';
 
-/// Track model representing a music track
 @JsonSerializable()
 class Track {
   final String id;
@@ -18,9 +17,9 @@ class Track {
   final String? releaseDate;
   final String? deezerId;
   final ServiceAvailability? availability;
-  final String? source; // Extension ID that provided this track (null for built-in sources)
-  final String? albumType; // album, single, ep, compilation (from metadata API)
-  final String? itemType; // track, album, playlist - for extension search results
+  final String? source;
+  final String? albumType;
+  final String? itemType;
 
   const Track({
     required this.id,
@@ -41,25 +40,19 @@ class Track {
     this.itemType,
   });
 
-  /// Check if this track is a single (based on album_type metadata)
   bool get isSingle => albumType == 'single' || albumType == 'ep';
   
-  /// Check if this is an album item (not a track)
   bool get isAlbumItem => itemType == 'album';
   
-  /// Check if this is a playlist item (not a track)
   bool get isPlaylistItem => itemType == 'playlist';
   
-  /// Check if this is an artist item (not a track)
   bool get isArtistItem => itemType == 'artist';
   
-  /// Check if this is a collection (album, playlist, or artist)
   bool get isCollection => isAlbumItem || isPlaylistItem || isArtistItem;
 
   factory Track.fromJson(Map<String, dynamic> json) => _$TrackFromJson(json);
   Map<String, dynamic> toJson() => _$TrackToJson(this);
   
-  /// Check if this track is from an extension
   bool get isFromExtension => source != null && source!.isNotEmpty;
 }