major refactor

lib/app.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+import 'package:mileograph_flutter/services/api_service.dart';
+import 'package:mileograph_flutter/services/authservice.dart';
+import 'package:mileograph_flutter/services/data_service.dart';
+import 'package:mileograph_flutter/ui/app_shell.dart';
+import 'package:provider/provider.dart';
+
+class App extends StatelessWidget {
+  const App({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MultiProvider(
+      providers: [
+        Provider<ApiService>(
+          create: (_) => ApiService(baseUrl: 'https://mileograph.co.uk/api/v1'),
+        ),
+        ChangeNotifierProvider<AuthService>(
+          create: (context) => AuthService(api: context.read<ApiService>()),
+        ),
+        ChangeNotifierProvider<DataService>(
+          create: (context) => DataService(api: context.read<ApiService>()),
+        ),
+      ],
+      child: const MyApp(),
+    );
+  }
+}