change app name, add route calculator

lib/services/dataService.dart

@@ -7,15 +7,22 @@ class DataService extends ChangeNotifier {
 
   DataService({required this.api});
 
+  // Homepage Data
   HomepageStats? _homepageStats;
   HomepageStats? get homepageStats => _homepageStats;
 
+  // Legs Data
   List<Leg> _legs = [];
   List<Leg> get legs => _legs;
 
+  // Traction Data
   List<LocoSummary> _traction = [];
   List<LocoSummary> get traction => _traction;
 
+  // Station Data
+  List<Station>? _cachedStations;
+  DateTime? _stationsFetchedAt;
+
   bool _isHomepageLoading = false;
   bool get isHomepageLoading => _isHomepageLoading;
 
@@ -84,4 +91,23 @@ class DataService extends ChangeNotifier {
             .mileage ??
         0;
   }
+
+  Future<List<Station>> fetchStations() async {
+    final now = DateTime.now();
+
+    // If cache exists and is less than 30 minutes old, return it
+    if (_cachedStations != null &&
+        _stationsFetchedAt != null &&
+        now.difference(_stationsFetchedAt!) < Duration(minutes: 30)) {
+      return _cachedStations!;
+    }
+
+    final response = await api.get('/location');
+    final parsed = (response as List).map((e) => Station.fromJson(e)).toList();
+
+    _cachedStations = parsed;
+    _stationsFetchedAt = now;
+
+    return parsed;
+  }
 }