Resume account-scoped pending sync after auth restoration

lib/services/sync/sync_providers.dart

@@ -51,6 +51,14 @@ final syncManagerProvider = ChangeNotifierProvider<SyncManager>((ref) {
     defaultProviderId: 'firebase',
   );
   final accountSync = ref.watch(firebaseAccountSyncServiceProvider);
+
+  // The provider is rebuilt when the account UID changes. If the new account
+  // already has persisted auth-blocked work, resume it immediately rather than
+  // waiting for another auth event that may never arrive.
+  if (ref.read(authNotifierProvider).isAuthenticated) {
+    manager.retryAuthRequired();
+  }
+
   ref.listen<AuthState>(authNotifierProvider, (previous, next) {
     if (next.isAuthenticated && previous?.isAuthenticated != true) {
       manager.retryAuthRequired();