implemented a customizable chat background system with support for patterns, solid colors, and gallery images; added a dedicated settings page with live preview and adjustable blur/dim effects, updated the image cropper to support flexible aspect ratios for wallpapers, and integrated file cleanup logic during account logout.

lib/view/pages/talk/chat_view.dart

@@ -14,7 +14,7 @@ import '../../../state/app/infrastructure/loadable_state/view/loadable_state_con
 import '../../../state/app/modules/chat/bloc/chat_bloc.dart';
 import '../../../state/app/modules/chat/bloc/chat_state.dart';
 import '../../../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
-import '../../../theming/app_theme.dart';
+import '../../../widget/chat_background.dart';
 import '../../../widget/clickable_app_bar.dart';
 import '../../../widget/user_avatar.dart';
 import 'data/chat_search_controller.dart';
@@ -367,16 +367,7 @@ class _ChatViewState extends State<ChatView> with RouteAware {
                   ],
                 ),
               ),
-        body: DecoratedBox(
-          decoration: BoxDecoration(
-            image: DecorationImage(
-              image: const AssetImage('assets/background/chat.png'),
-              scale: 1.5,
-              opacity: 1,
-              repeat: ImageRepeat.repeat,
-              invertColors: AppTheme.isDarkMode(context),
-            ),
-          ),
+        body: ChatBackground(
           child: Column(
             children: [
               Expanded(