fix locos for trips, hopefully improve build times

lib/services/dataService.dart

@@ -277,26 +277,34 @@ class DataService extends ChangeNotifier {
 
   Future<List<TripLocoStat>> fetchTripLocoStats(int tripId) async {
     try {
-      final json = await api.get('/trips/stats?trip_id=$tripId');
-      if (json is List) {
-        return json
-            .whereType<Map<String, dynamic>>()
-            .map((e) => TripLocoStat.fromJson(e))
-            .toList();
-      }
-      if (json is Map && json['locos'] is List) {
-        return (json['locos'] as List)
-            .whereType<Map<String, dynamic>>()
-            .map((e) => TripLocoStat.fromJson(e))
-            .toList();
-      }
-      return [];
+      final json = await api.get('/trips/stats/$tripId');
+      return _parseTripLocoStats(json);
     } catch (e) {
       debugPrint('Failed to fetch trip loco stats: $e');
       return [];
     }
   }
 
+  List<TripLocoStat> _parseTripLocoStats(dynamic json) {
+    List<dynamic>? list;
+    if (json is List) {
+      list = json.expand((e) => e is List ? e : [e]).toList();
+    } else if (json is Map) {
+      for (final key in ['locos', 'stats', 'data', 'trip_locos']) {
+        final candidate = json[key];
+        if (candidate is List) {
+          list = candidate.expand((e) => e is List ? e : [e]).toList();
+          break;
+        }
+      }
+    }
+    if (list == null) return [];
+    return list
+        .whereType<Map<String, dynamic>>()
+        .map((e) => TripLocoStat.fromJson(e))
+        .toList();
+  }
+
   Future<void> fetchEventFields({bool force = false}) async {
     if (_eventFields.isNotEmpty && !force) return;
     _isEventFieldsLoading = true;