Temporary setup of alternative to advertisements

lib/main.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
+import 'app_navigator.dart';
 import 'screens/main_shell.dart';
 import 'screens/user_agreement_screen.dart';
 import 'services/app_state.dart';
@@ -11,12 +12,6 @@ void main() {
   runApp(const FuelTaxTrackerApp());
 }
 
-/// A stable handle on the navigator so [AppState.onAdWatched] can show the
-/// "remove ads" dialog from wherever the app happens to be — it fires from
-/// deep inside a background sync, not from a widget's own build method, so
-/// there's no local [BuildContext] to reach for at that point.
-final navigatorKey = GlobalKey<NavigatorState>();
-
 class FuelTaxTrackerApp extends StatelessWidget {
   const FuelTaxTrackerApp({super.key});
 
@@ -32,7 +27,7 @@ class FuelTaxTrackerApp extends StatelessWidget {
           };
           return MaterialApp(
             navigatorKey: navigatorKey,
-            title: 'Fuel Tax Tracker',
+            title: 'Receipt Tracker',
             theme: AppTheme.light,
             darkTheme: AppTheme.dark,
             themeMode: appState.themeMode,