keep messaging album on first use

mobile/lib/domain/models/store.model.dart

@@ -88,7 +88,8 @@ enum StoreKey<T> {
   cleanupKeepFavorites<bool>._(1008),
   cleanupKeepMediaType<int>._(1009),
   cleanupKeepAlbumIds<String>._(1010),
-  cleanupCutoffDaysAgo<int>._(1011);
+  cleanupCutoffDaysAgo<int>._(1011),
+  cleanupDefaultsInitialized<bool>._(1012);
 
   const StoreKey._(this.id);
   final int id;

mobile/lib/providers/cleanup.provider.dart

@@ -123,7 +123,6 @@ class CleanupNotifier extends StateNotifier<CleanupState> {
     _appSettingsService.setSetting(AppSettingsEnum.cleanupKeepAlbumIds, albumIds.join(','));
   }
 
-  /// Remove album IDs that no longer exist on the device
   void cleanupStaleAlbumIds(Set<String> existingAlbumIds) {
     final staleIds = state.keepAlbumIds.difference(existingAlbumIds);
     if (staleIds.isNotEmpty) {
@@ -133,6 +132,21 @@ class CleanupNotifier extends StateNotifier<CleanupState> {
     }
   }
 
+  void applyDefaultAlbumSelections(List<(String id, String name)> albums) {
+    final isInitialized = _appSettingsService.getSetting(AppSettingsEnum.cleanupDefaultsInitialized);
+    if (isInitialized) return;
+
+    final toKeep = _cleanupService.getDefaultKeepAlbumIds(albums);
+
+    if (toKeep.isNotEmpty) {
+      final keepAlbumIds = {...state.keepAlbumIds, ...toKeep};
+      state = state.copyWith(keepAlbumIds: keepAlbumIds);
+      _persistExcludedAlbumIds(keepAlbumIds);
+    }
+
+    _appSettingsService.setSetting(AppSettingsEnum.cleanupDefaultsInitialized, true);
+  }
+
   Future<void> scanAssets() async {
     if (_userId == null || state.selectedDate == null) {
       return;

mobile/lib/services/app_settings.service.dart

@@ -58,7 +58,8 @@ enum AppSettingsEnum<T> {
   cleanupKeepFavorites<bool>(StoreKey.cleanupKeepFavorites, null, true),
   cleanupKeepMediaType<int>(StoreKey.cleanupKeepMediaType, null, 0),
   cleanupKeepAlbumIds<String>(StoreKey.cleanupKeepAlbumIds, null, ""),
-  cleanupCutoffDaysAgo<int>(StoreKey.cleanupCutoffDaysAgo, null, -1);
+  cleanupCutoffDaysAgo<int>(StoreKey.cleanupCutoffDaysAgo, null, -1),
+  cleanupDefaultsInitialized<bool>(StoreKey.cleanupDefaultsInitialized, null, false);
 
   const AppSettingsEnum(this.storeKey, this.hiveKey, this.defaultValue);
 

mobile/lib/services/cleanup.service.dart

@@ -43,4 +43,18 @@ class CleanupService {
 
     return 0;
   }
+
+  /// Returns album IDs that should be kept by default (e.g., messaging app albums)
+  Set<String> getDefaultKeepAlbumIds(List<(String id, String name)> albums) {
+    const messagingApps = ['whatsapp', 'telegram', 'signal', 'messenger', 'viber', 'wechat', 'line'];
+
+    final toKeep = <String>{};
+    for (final (id, name) in albums) {
+      final albumName = name.toLowerCase();
+      if (messagingApps.any((app) => albumName.contains(app))) {
+        toKeep.add(id);
+      }
+    }
+    return toKeep;
+  }
 }

mobile/lib/widgets/settings/free_up_space_settings.dart

@@ -26,6 +26,24 @@ class _FreeUpSpaceSettingsState extends ConsumerState<FreeUpSpaceSettings> {
   bool _hasScanned = false;
   bool _isKeepSettingsExpanded = false;
 
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _initializeAlbumDefaults();
+    });
+  }
+
+  Future<void> _initializeAlbumDefaults() async {
+    final albums = await ref.read(localAlbumProvider.future);
+    final existingAlbumIds = albums.map((a) => a.id).toSet();
+    final albumsWithNames = albums.map((a) => (a.id, a.name)).toList();
+
+    final notifier = ref.read(cleanupProvider.notifier);
+    notifier.applyDefaultAlbumSelections(albumsWithNames);
+    notifier.cleanupStaleAlbumIds(existingAlbumIds);
+  }
+
   void _resetState() {
     ref.read(cleanupProvider.notifier).reset();
     _hasScanned = false;
@@ -779,15 +797,6 @@ class _KeepAlbumsSection extends ConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final albumsAsync = ref.watch(localAlbumProvider);
 
-    // Clean up stale album IDs when albums are loaded
-    albumsAsync.whenData((albums) {
-      final existingAlbumIds = albums.map((a) => a.id).toSet();
-      // Use Future.microtask to avoid modifying state during build
-      Future.microtask(() {
-        ref.read(cleanupProvider.notifier).cleanupStaleAlbumIds(existingAlbumIds);
-      });
-    });
-
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [