[Launcher] feat: add incremental downloads toggle

Author: 7reax

Launcher/lib/core/services/app_settings.dart

@@ -28,6 +28,12 @@ class General {
 
   set enabledPreloadMods(bool value) => box.put('enabledPreloadMods', value);
 
+  bool get incrementalDownloadsEnabled =>
+      box.get('incrementalDownloadsEnabled', defaultValue: true) as bool;
+
+  set incrementalDownloadsEnabled(bool value) =>
+      box.put('incrementalDownloadsEnabled', value);
+
   String? get currentVersion => box.get('currentVersion') as String?;
 
   set currentVersion(String? value) => box.put('currentVersion', value);

Launcher/lib/features/download_manager/services/download_orchestrator.dart

@@ -196,8 +196,12 @@ class DownloadOrchestrator with ChangeNotifier {
         return false;
       }
 
-      final updater = IncrementalUpdater();
-      if (resolved.filename.endsWith('.zip')) {
+      final isZipFile = extension(resolved.filename) == '.zip';
+      final useIncrementalUpdate =
+          Preferences.general.incrementalDownloadsEnabled;
+
+      if (useIncrementalUpdate && isZipFile) {
+        final updater = IncrementalUpdater();
         final isEligible = await updater.checkEligibility(resolved.url);
         if (isEligible) {
           _logger.info('Using incremental update for ${request.displayName}');

Launcher/lib/features/settings/screens/pages/mod_support.dart

@@ -17,7 +17,7 @@ class ModSupport extends StatelessWidget {
         const SettingsHeader(title: 'MODS'),
         HiveListener(
           box: box,
-          keys: ['enabledPreloadMods'],
+          keys: ['enabledPreloadMods', 'incrementalDownloadsEnabled'],
           builder: (_) => KyberTable(
             items: [
               KyberTableItem.button(
@@ -43,6 +43,13 @@ class ModSupport extends StatelessWidget {
                   Preferences.general.enabledPreloadMods = value;
                 },
               ),
+              KyberTableItem.switchButton(
+                title: 'Incremental Mod Downloads',
+                value: Preferences.general.incrementalDownloadsEnabled,
+                onChange: (bool value) {
+                  Preferences.general.incrementalDownloadsEnabled = value;
+                },
+              ),
             ],
           ),
         ),