Refactor architecture, fix all linter issues, and implement specification features (5 tabs, issue dropdowns, contact, info, search, pdf)

lib/main.dart

@@ -1,9 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'anonym_aut.dart';
-import 'home.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'firebase_options.dart';
+import 'screens/home_screen.dart';
+import 'services/auth_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -12,24 +12,40 @@ void main() async {
   );
   runApp(
     ChangeNotifierProvider(
-      create: (context) => AuthState(),
+      create: (context) => AuthService(),
       child: const MyApp(),
     ),
   );
 }
 
-
 class MyApp extends StatelessWidget {
   const MyApp({super.key});
 
-  // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
-    return const MaterialApp(
+    return MaterialApp(
       title: 'Oggauer Gemeindetrommler',
-      home: MyHomePage(title: 'Oggauer Gemeindetrommler'),
       debugShowCheckedModeBanner: false,
+      theme: ThemeData(
+        useMaterial3: true,
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: const Color(0xFF1565C0), // Municipal blue
+          primary: const Color(0xFF1565C0),
+        ),
+        appBarTheme: const AppBarTheme(
+          centerTitle: true,
+          elevation: 1,
+          backgroundColor: Colors.white,
+          foregroundColor: Colors.black87,
+        ),
+        cardTheme: CardTheme(
+          elevation: 1,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(10),
+          ),
+        ),
+      ),
+      home: const HomeScreen(),
     );
   }
 }
-