fix sync

lib/providers/sync_provider.dart

@@ -36,6 +36,7 @@ class SyncController extends ChangeNotifier {
     _wasLoggedIn = auth.isLoggedIn;
     _meta.onPersisted = _schedulePush;
     _auth.addListener(_onAuthChanged);
+    _bank.onAfterSuccessfulLoad = _onBankDataLoaded;
     if (_auth.isLoggedIn) {
       unawaited(syncNow());
     }
@@ -188,6 +189,33 @@ class SyncController extends ChangeNotifier {
     }
   }
 
+  /// Bank pull-to-refresh / reconnect finished — reconcile with PocketBase.
+  ///
+  /// Always runs a full sync when logged in so (1) new API txs are pushed and
+  /// (2) any cloud-only history the bank window lacks is pulled back.
+  void _onBankDataLoaded() {
+    if (!_auth.isLoggedIn) return;
+    unawaited(syncNow());
+  }
+
+  /// If the server has more bank txs than this device, sync now.
+  Future<void> syncIfBehindServer() async {
+    if (!_auth.isLoggedIn || _syncing) return;
+    try {
+      final remoteCount =
+          await PbSyncService(_auth.client).countTransactions();
+      if (remoteCount > _bank.transactions.length) {
+        debugPrint(
+          'SyncController: behind server '
+          '(local=${_bank.transactions.length} remote=$remoteCount) — syncing',
+        );
+        await syncNow();
+      }
+    } catch (error, stackTrace) {
+      debugPrint('SyncController.syncIfBehindServer failed: $error\n$stackTrace');
+    }
+  }
+
   void _schedulePush() {
     if (!_auth.isLoggedIn) return;
     _pushDebounce?.cancel();
@@ -329,6 +357,7 @@ class SyncController extends ChangeNotifier {
     _progressHold?.cancel();
     _uiNotifyThrottle?.cancel();
     _auth.removeListener(_onAuthChanged);
+    _bank.onAfterSuccessfulLoad = null;
     _meta.onPersisted = null;
     super.dispose();
   }