fix: upload progress bar flickering (#25829)

* fix: upload progress bar flickering

* pr feedback and more logs

mobile/lib/providers/backup/drift_backup.provider.dart

@@ -259,6 +259,11 @@ class DriftBackupNotifier extends StateNotifier<DriftBackupState> {
   }
 
   Future<void> startForegroundBackup(String userId) async {
+    // Cancel any existing backup before starting a new one
+    if (state.cancelToken != null) {
+      await stopForegroundBackup();
+    }
+
     state = state.copyWith(error: BackupError.none);
 
     final cancelToken = CancellationToken();
@@ -375,21 +380,21 @@ class DriftBackupNotifier extends StateNotifier<DriftBackupState> {
       _logger.warning("Skip handleBackupResume (pre-call): notifier disposed");
       return;
     }
-    _logger.info("Resuming backup tasks...");
+    _logger.info("Start background backup sequence");
     state = state.copyWith(error: BackupError.none);
     final tasks = await _backgroundUploadService.getActiveTasks(kBackupGroup);
     if (!mounted) {
       _logger.warning("Skip handleBackupResume (post-call): notifier disposed");
       return;
     }
-    _logger.info("Found ${tasks.length} tasks");
+    _logger.info("Found ${tasks.length} pending tasks");
 
     if (tasks.isEmpty) {
-      _logger.info("Start backup with URLSession");
+      _logger.info("No pending tasks, starting new upload");
       return _backgroundUploadService.uploadBackupCandidates(userId);
     }
 
-    _logger.info("Tasks to resume: ${tasks.length}");
+    _logger.info("Resuming upload ${tasks.length} assets");
     return _backgroundUploadService.resume();
   }
 }

mobile/lib/services/background_upload.service.dart

@@ -164,9 +164,12 @@ class BackgroundUploadService {
 
     final candidates = await _backupRepository.getCandidates(userId);
     if (candidates.isEmpty) {
+      _logger.info("No new backup candidates found, finishing background upload");
       return;
     }
 
+    _logger.info("Found ${candidates.length} backup candidates for background tasks");
+
     const batchSize = 100;
     final batch = candidates.take(batchSize).toList();
     List<UploadTask> tasks = [];
@@ -179,6 +182,7 @@ class BackgroundUploadService {
     }
 
     if (tasks.isNotEmpty && !shouldAbortQueuingTasks) {
+      _logger.info("Enqueuing ${tasks.length} background upload tasks");
       await enqueueTasks(tasks);
     }
   }

mobile/pubspec.lock

@@ -1249,10 +1249,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: e3641ec5d63ebf0d9b41bd43201a66e3fc79a65db5f61fc181f04cd27aab950c
+      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
       url: "https://pub.dev"
     source: hosted
-    version: "1.16.0"
+    version: "1.17.0"
   mime:
     dependency: transitive
     description:
@@ -1942,10 +1942,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "522f00f556e73044315fa4585ec3270f1808a4b186c936e612cab0b565ff1e00"
+      sha256: ab2726c1a94d3176a45960b6234466ec367179b87dd74f1611adb1f3b5fb9d55
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.6"
+    version: "0.7.7"
   thumbhash:
     dependency: "direct main"
     description: