Fügt grundlegendes Routing mit Routemaster hinzu und ersetzt MyApp-Struktur

lib/Services/navigation_service.dart

@@ -0,0 +1,6 @@
+import 'package:flutter/material.dart';
+
+class NavigationService {
+  static final GlobalKey<NavigatorState> navigatorKey =
+      GlobalKey<NavigatorState>();
+}

lib/Services/router_service.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+import 'package:routemaster/routemaster.dart';
+
+import '../Pages/Dashboard/dashboard.dart';
+import '../Pages/Settings/settings.dart';
+import '../Pages/Trend/trend.dart';
+import '../Pages/home_page.dart';
+
+class RouterService {
+  static final RouteMap routes = RouteMap(
+    routes: {
+      '/': (_) => TabPage(
+        child: HomePage(),
+        paths: const <String>['/dashboard', '/trend', '/settings'],
+      ),
+      '/dashboard': (_) => MaterialPage(child: Dashboard()),
+      '/trend': (_) => MaterialPage(child: Trend()),
+      '/settings': (_) => MaterialPage(child: Settings()),
+    },
+  );
+}