Actualizacion del programa

lib/services/route_simulator_service.dart

@@ -143,6 +143,11 @@ class RouteSimulatorService extends ChangeNotifier {
     final n = AppNotification(event:event, title:title, body:body, routeId:routeId);
     _lastNotification = n;
     _history.insert(0, n);
+    // Persistir en DB para historial
+    DbHelper.insertNotifHistory(
+      routeId: routeId, eventType: event.name,
+      title: title, body: body,
+    ).catchError((_) {});
     notifyListeners();
   }
 

lib/services/theme_service.dart

@@ -0,0 +1,24 @@
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class ThemeService extends ChangeNotifier {
+  ThemeMode _themeMode = ThemeMode.light;
+  ThemeMode get themeMode => _themeMode;
+  bool get isDark => _themeMode == ThemeMode.dark;
+
+  ThemeService() { _load(); }
+
+  Future<void> _load() async {
+    final p = await SharedPreferences.getInstance();
+    final isDark = p.getBool('dark_mode') ?? false;
+    _themeMode = isDark ? ThemeMode.dark : ThemeMode.light;
+    notifyListeners();
+  }
+
+  Future<void> toggle() async {
+    _themeMode = _themeMode == ThemeMode.dark ? ThemeMode.light : ThemeMode.dark;
+    final p = await SharedPreferences.getInstance();
+    await p.setBool('dark_mode', _themeMode == ThemeMode.dark);
+    notifyListeners();
+  }
+}