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

lib/features/chat/presentation/pages/chats_screen.dart

@@ -20,6 +20,19 @@ class ChatsScreen extends StatefulWidget {
 class _ChatsScreenState extends State<ChatsScreen> {
   final searchController = TextEditingController();
 
+  @override
+  void initState() {
+    super.initState();
+    // Инициализация ChatsCubit при первом открытии экрана
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      final cubit = context.read<ChatsCubit>();
+      final state = cubit.state;
+      if (state.state == BaseState.initial) {
+        cubit.getChatRoomsWithLoading();
+      }
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     return BlocBuilder<ChatsCubit, ChatsState>(