fix: concurrency issue (#21830)

mobile/lib/domain/services/background_worker.service.dart

@@ -169,7 +169,10 @@ class BackgroundWorkerBgService extends BackgroundWorkerFlutterApi {
     }
 
     try {
+      final backgroundSyncManager = _ref.read(backgroundSyncProvider);
       _isCleanedUp = true;
+      _ref.dispose();
+
       _cancellationToken.cancel();
       _logger.info("Cleaning up background worker");
       final cleanupFutures = [
@@ -179,14 +182,13 @@ class BackgroundWorkerBgService extends BackgroundWorkerFlutterApi {
         }),
         _drift.close(),
         _driftLogger.close(),
-        _ref.read(backgroundSyncProvider).cancel(),
-        _ref.read(backgroundSyncProvider).cancelLocal(),
+        backgroundSyncManager.cancel(),
+        backgroundSyncManager.cancelLocal(),
       ];
 
       if (_isar.isOpen) {
         cleanupFutures.add(_isar.close());
       }
-      _ref.dispose();
       await Future.wait(cleanupFutures);
       _logger.info("Background worker resources cleaned up");
     } catch (error, stack) {
@@ -195,6 +197,8 @@ class BackgroundWorkerBgService extends BackgroundWorkerFlutterApi {
   }
 
   Future<void> _handleBackup() async {
+    await runZonedGuarded(
+      () async {
         if (!_isBackupEnabled || _isCleanedUp) {
           _logger.info("[_handleBackup 1] Backup is disabled. Skipping backup routine");
           return;
@@ -224,6 +228,11 @@ class BackgroundWorkerBgService extends BackgroundWorkerFlutterApi {
         return _ref
             .read(uploadServiceProvider)
             .startBackupWithHttpClient(currentUser.id, networkCapabilities.hasWifi, _cancellationToken);
+      },
+      (error, stack) {
+        debugPrint("Error in backup zone $error, $stack");
+      },
+    );
   }
 
   Future<void> _syncAssets({Duration? hashTimeout}) async {

mobile/lib/domain/utils/sync_linked_album.dart

@@ -1,9 +1,10 @@
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/domain/models/store.model.dart';
 import 'package:immich_mobile/domain/services/sync_linked_album.service.dart';
-import 'package:immich_mobile/providers/user.provider.dart';
+import 'package:immich_mobile/entities/store.entity.dart';
 
 Future<void> syncLinkedAlbumsIsolated(ProviderContainer ref) {
-  final user = ref.read(currentUserProvider);
+  final user = Store.tryGet(StoreKey.currentUser);
   if (user == null) {
     return Future.value();
   }

mobile/lib/main.dart

@@ -46,7 +46,7 @@ void main() async {
   await Bootstrap.initDomain(isar, drift, logDb);
   await initApp();
   // Warm-up isolate pool for worker manager
-  await workerManager.init(dynamicSpawning: false);
+  await workerManager.init(dynamicSpawning: true);
   await migrateDatabaseIfNeeded(isar, drift);
   HttpSSLOptions.apply();
 

mobile/lib/utils/isolate.dart

@@ -31,6 +31,8 @@ Cancelable<T?> runInIsolateGentle<T>({
   }
 
   return workerManager.executeGentle((cancelledChecker) async {
+    await runZonedGuarded(
+      () async {
         BackgroundIsolateBinaryMessenger.ensureInitialized(token);
         DartPluginRegistrant.ensureInitialized();
 
@@ -57,21 +59,20 @@ Cancelable<T?> runInIsolateGentle<T>({
           log.severe("Error in runInIsolateGentle ${debugLabel == null ? '' : ' for $debugLabel'}", error, stack);
         } finally {
           try {
+            ref.dispose();
+
             await LogService.I.dispose();
             await logDb.close();
-        await ref.read(driftProvider).close();
+            await drift.close();
 
             // Close Isar safely
             try {
-          final isar = ref.read(isarProvider);
               if (isar.isOpen) {
                 await isar.close();
               }
             } catch (e) {
               debugPrint("Error closing Isar: $e");
             }
-
-        ref.dispose();
           } catch (error, stack) {
             debugPrint("Error closing resources in isolate: $error, $stack");
           } finally {
@@ -81,5 +82,11 @@ Cancelable<T?> runInIsolateGentle<T>({
           }
         }
         return null;
+      },
+      (error, stack) {
+        debugPrint("Error in isolate zone: $error, $stack");
+      },
+    );
+    return null;
   });
 }