chore: fix linter warnings

packages/chatty/lib/ui/home/chat/chat_view.dart

@@ -5,7 +5,7 @@ import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 class ChatView extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    final textColor = Theme.of(context).appBarTheme.color;
+    final textColor = Theme.of(context).appBarTheme.backgroundColor;
     return Scaffold(
       backgroundColor: Theme.of(context).canvasColor,
       appBar: AppBar(

packages/chatty/lib/ui/home/chat/selection/friends_selection_view.dart

@@ -25,8 +25,8 @@ class FriendsSelectionView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final textColor = Theme.of(context).appBarTheme.color;
-    final accentColor = Theme.of(context).accentColor;
+    final textColor = Theme.of(context).appBarTheme.backgroundColor;
+    final accentColor = Theme.of(context).colorScheme.secondary;
     return MultiBlocProvider(
       providers: [
         BlocProvider(

packages/chatty/lib/ui/home/chat/selection/group_selection_view.dart

@@ -48,7 +48,7 @@ class GroupSelectionView extends StatelessWidget {
                 'New Group',
                 style: TextStyle(
                   fontSize: 24,
-                  color: Theme.of(context).appBarTheme.color,
+                  color: Theme.of(context).appBarTheme.backgroundColor,
                   fontWeight: FontWeight.w800,
                 ),
               ),

packages/chatty/lib/ui/home/settings/settings_view.dart

@@ -44,7 +44,6 @@ class SettingsView extends StatelessWidget {
             child: Column(
               children: [
                 AvatarImageView(
-                  //TODO: implement change avatar
                   onTap: () => null,
                   child: image != null
                       ? Image.network(