feat(notifications): added navigation from different types of notifications

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

@@ -11,7 +11,11 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 
 class ChatsScreen extends StatefulWidget {
-  const ChatsScreen({super.key});
+  const ChatsScreen({super.key, this.initialSearchQuery});
+
+  /// When set (e.g. from notification tap), the search field is pre-filled
+  /// and chat list is filtered by this query.
+  final String? initialSearchQuery;
 
   @override
   State<ChatsScreen> createState() => _ChatsScreenState();
@@ -23,12 +27,17 @@ class _ChatsScreenState extends State<ChatsScreen> {
   @override
   void initState() {
     super.initState();
-    // Инициализация ChatsCubit при первом открытии экрана
+    final query = widget.initialSearchQuery?.trim();
+    if (query != null && query.isNotEmpty) {
+      searchController.text = query;
+    }
     WidgetsBinding.instance.addPostFrameCallback((_) {
       final cubit = context.read<ChatsCubit>();
       final state = cubit.state;
       if (state.state == BaseState.initial) {
-        cubit.getChatRoomsWithLoading();
+        cubit.getChatRoomsWithLoading(query: query?.isNotEmpty == true ? query : null);
+      } else if (query != null && query.isNotEmpty) {
+        cubit.getChatRooms(query: query);
       }
     });
   }