align app with main repo

stream_chat_v1/lib/main.dart

@@ -1,5 +1,4 @@
 import 'dart:async';
-import 'dart:io';
 
 import 'package:example/chat_info_screen.dart';
 import 'package:example/choose_user_page.dart';
@@ -10,6 +9,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
+import 'package:stream_chat_persistence/stream_chat_persistence.dart';
 import 'package:streaming_shared_preferences/streaming_shared_preferences.dart';
 
 import 'notifications_service.dart';
@@ -17,6 +17,11 @@ import 'routes/app_routes.dart';
 import 'routes/routes.dart';
 import 'search_text_field.dart';
 
+final chatPersistentClient = StreamChatPersistenceClient(
+  logLevel: Level.INFO,
+  connectionMode: ConnectionMode.background,
+);
+
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   final secureStorage = FlutterSecureStorage();
@@ -24,13 +29,10 @@ void main() async {
   final apiKey = await secureStorage.read(key: kStreamApiKey);
   final userId = await secureStorage.read(key: kStreamUserId);
 
-  final client = Client(
+  final client = StreamChatClient(
     apiKey ?? kDefaultStreamApiKey,
     logLevel: Level.INFO,
-    showLocalNotification:
-        (!kIsWeb && Platform.isAndroid) ? showLocalNotification : null,
-    persistenceEnabled: true,
-  );
+  )..chatPersistenceClient = chatPersistentClient;
 
   if (userId != null) {
     final token = await secureStorage.read(key: kStreamToken);
@@ -38,16 +40,13 @@ void main() async {
       User(id: userId),
       token,
     );
-    if (!kIsWeb) {
-      initNotifications(client);
-    }
   }
 
   runApp(MyApp(client));
 }
 
 class MyApp extends StatelessWidget {
-  final Client client;
+  final StreamChatClient client;
 
   MyApp(this.client);
 
@@ -68,6 +67,7 @@ class MyApp extends StatelessWidget {
             builder: (context, child) {
               return StreamChat(
                 client: client,
+                onBackgroundEventReceived: showLocalNotification,
                 child: Builder(
                   builder: (context) => AnnotatedRegion<SystemUiOverlayStyle>(
                     child: child,
@@ -294,7 +294,7 @@ class _HomePageState extends State<HomePage> {
                         ),
                       ),
                       trailing: IconButton(
-                        icon: StreamSvgIcon.Icon_moon(
+                        icon: StreamSvgIcon.iconMoon(
                           size: 24,
                         ),
                         color: StreamChatTheme.of(context).colorTheme.grey,