refactor: implement lazy initialization for global BlocProviders and enhance Firebase initialization with timeout handling

lib/core/app_initializer.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io' as io;
 import 'package:eatvio_app/core/app_config.dart';
 import 'package:eatvio_app/core/env_config.dart';
@@ -37,9 +38,20 @@ class AppInitializer {
 
   /// Инициализация Firebase
   static Future<void> _initializeFirebase() async {
-    await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);
+    await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform).timeout(
+      const Duration(seconds: 10),
+      onTimeout: () {
+        throw TimeoutException('Firebase initialization timeout');
+      },
+    );
     if (sl<AppConfig>().buildType == AppBuildType.prod) {
-      await FirebaseMessaging.instance.requestPermission();
+      try {
+        await FirebaseMessaging.instance.requestPermission().timeout(
+          const Duration(seconds: 5),
+        );
+      } catch (e) {
+        // Разрешение не критично, продолжаем работу
+      }
     }
   }