update

lib/app/app.dart

@@ -1,16 +1,25 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'router.dart';
 import 'theme.dart';
+import '../features/settings/provider.dart';
 
-class App extends StatelessWidget {
+class App extends ConsumerWidget {
   const App({super.key});
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final themeMode = ref.watch(themeProvider);
+    
+    // Trigger exchange rate fetch on app start
+    ref.watch(ratesInitProvider);
+
     return MaterialApp.router(
       title: 'Finance Tracker',
       debugShowCheckedModeBanner: false,
-      theme: buildAppTheme(),
+      theme: AppTheme.lightTheme,
+      darkTheme: AppTheme.darkTheme,
+      themeMode: themeMode,
       routerConfig: appRouter,
     );
   }