feat: rebuild cross-extension sharing and queue controls

Co-authored-by: Amonoman <musaauron87@gmail.com>

lib/models/settings.dart

@@ -91,6 +91,7 @@ class AppSettings {
 
   final bool
   deduplicateDownloads; // Skip downloading tracks already present in history
+  final bool saveDownloadHistory; // Record completed downloads in local history
 
   const AppSettings({
     this.defaultService = '',
@@ -152,6 +153,7 @@ class AppSettings {
     this.musixmatchLanguage = '',
     this.lastSeenVersion = '',
     this.deduplicateDownloads = true,
+    this.saveDownloadHistory = true,
   });
 
   AppSettings copyWith({
@@ -217,6 +219,7 @@ class AppSettings {
     String? musixmatchLanguage,
     String? lastSeenVersion,
     bool? deduplicateDownloads,
+    bool? saveDownloadHistory,
   }) {
     return AppSettings(
       defaultService: defaultService ?? this.defaultService,
@@ -300,6 +303,7 @@ class AppSettings {
       musixmatchLanguage: musixmatchLanguage ?? this.musixmatchLanguage,
       lastSeenVersion: lastSeenVersion ?? this.lastSeenVersion,
       deduplicateDownloads: deduplicateDownloads ?? this.deduplicateDownloads,
+      saveDownloadHistory: saveDownloadHistory ?? this.saveDownloadHistory,
     );
   }
 

lib/models/settings.g.dart

@@ -82,6 +82,7 @@ AppSettings _$AppSettingsFromJson(Map<String, dynamic> json) => AppSettings(
   musixmatchLanguage: json['musixmatchLanguage'] as String? ?? '',
   lastSeenVersion: json['lastSeenVersion'] as String? ?? '',
   deduplicateDownloads: json['deduplicateDownloads'] as bool? ?? true,
+  saveDownloadHistory: json['saveDownloadHistory'] as bool? ?? true,
 );
 
 Map<String, dynamic> _$AppSettingsToJson(
@@ -147,4 +148,5 @@ Map<String, dynamic> _$AppSettingsToJson(
   'musixmatchLanguage': instance.musixmatchLanguage,
   'lastSeenVersion': instance.lastSeenVersion,
   'deduplicateDownloads': instance.deduplicateDownloads,
+  'saveDownloadHistory': instance.saveDownloadHistory,
 };