Fix transfer functoin, add display for numer of pending locos

lib/services/data_service/data_service_core.dart

@@ -52,6 +52,8 @@ class DataService extends ChangeNotifier {
   bool get isTractionLoading => _isTractionLoading;
   bool _tractionHasMore = false;
   bool get tractionHasMore => _tractionHasMore;
+  int _pendingLocoCount = 0;
+  int get pendingLocoCount => _pendingLocoCount;
   List<LocoChange> _latestLocoChanges = [];
   List<LocoChange> get latestLocoChanges => _latestLocoChanges;
   bool _isLatestLocoChangesLoading = false;
@@ -94,6 +96,22 @@ class DataService extends ChangeNotifier {
   bool _isEventFieldsLoading = false;
   bool get isEventFieldsLoading => _isEventFieldsLoading;
 
+  Future<void> fetchPendingLocoCount() async {
+    try {
+      final json = await api.get('/loco/pending?limit=1000&offset=0');
+      if (json is List) {
+        _pendingLocoCount = json.length;
+      } else {
+        _pendingLocoCount = 0;
+      }
+    } catch (e) {
+      debugPrint('Failed to fetch pending loco count: $e');
+      _pendingLocoCount = 0;
+    } finally {
+      _notifyAsync();
+    }
+  }
+
   // Station Data
   final Map<String, List<Station>> _stationCache = {};
   final Map<String, Future<List<Station>>?> _stationInFlightByKey = {};

lib/services/data_service/data_service_traction.dart

@@ -62,8 +62,9 @@ extension DataServiceTraction on DataService {
       _tractionHasMore = false;
     } finally {
       _isTractionLoading = false;
-      _notifyAsync();
-    }
+    _notifyAsync();
+  }
+
   }
 
   Future<List<LocoAttrVersion>> fetchLocoTimeline(