feat: add sounds

lib/main.dart

@@ -2,11 +2,13 @@ import 'package:flutter/material.dart';
 
 import 'app.dart';
 import 'core/locator/locator.dart';
+import 'core/service/app_sounds.dart';
 import 'feature/auth/domain/repository/auth_repository.dart';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await setupLocator();
+  AppSounds.preload(); // پیش‌بارگذاریِ صداها (بدون انتظار)
   final loggedIn = await locator<AuthRepository>().isLoggedIn();
   runApp(HakemApp(loggedIn: loggedIn));
 }