sheets view: add refresh button for annotations

lib/core/services/annotation_sync_service.dart

@@ -15,24 +15,26 @@ class AnnotationSyncService {
   AnnotationSyncService({
     required ApiClient apiClient,
     required StorageService storageService,
-  })  : _apiClient = apiClient,
-        _storageService = storageService;
+  }) : _apiClient = apiClient,
+       _storageService = storageService;
 
   /// Downloads annotations from server and merges with local storage.
   ///
   /// For each page, compares server's lastModified with local lastModified.
   /// If server is newer, overwrites local. Local annotations that are newer
   /// are preserved.
-  Future<void> syncFromServer(String sheetUuid) async {
+  Future<void> syncAnnotationsFromServer(String sheetUuid) async {
     try {
       _log.info('Syncing annotations from server for sheet $sheetUuid');
 
       // Fetch all annotations from server
       final serverAnnotations = await _apiClient.fetchAnnotations(sheetUuid);
 
+      _log.fine('Fetched annotations from server for sheet $sheetUuid');
+
       // Get all local annotations with metadata
-      final localAnnotations =
-          await _storageService.readAllAnnotationsWithMetadata(sheetUuid);
+      final localAnnotations = await _storageService
+          .readAllAnnotationsWithMetadata(sheetUuid);
 
       int updatedCount = 0;
 
@@ -118,7 +120,8 @@ class AnnotationSyncService {
       return false;
     } catch (e) {
       _log.warning(
-          'Unexpected error uploading annotation, queuing for later: $e');
+        'Unexpected error uploading annotation, queuing for later: $e',
+      );
       await _queueForLaterUpload(
         sheetUuid: sheetUuid,
         page: page,