implemented chat long-polling and optimistic updates, centralized notification management, optimized avatar caching

lib/view/pages/talk/chat_list.dart

@@ -7,7 +7,6 @@ import '../../../notification/notify_updater.dart';
 import '../../../routing/app_routes.dart';
 import '../../../state/app/infrastructure/loadable_state/loadable_state.dart';
 import '../../../state/app/infrastructure/loadable_state/view/loadable_state_consumer.dart';
-import '../../../state/app/infrastructure/utility_widgets/bloc_module.dart';
 import '../../../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
 import '../../../state/app/modules/chat_list/bloc/chat_list_state.dart';
 import '../../../state/app/modules/settings/bloc/settings_cubit.dart';
@@ -19,15 +18,13 @@ import 'search_chat.dart';
 import 'widgets/chat_tile.dart';
 import 'widgets/split_view_placeholder.dart';
 
+// Reads from the global ChatListBloc in main.dart — re-providing a local
+// one here would shadow it and split the state in two.
 class ChatList extends StatelessWidget {
   const ChatList({super.key});
 
   @override
-  Widget build(BuildContext context) =>
-      BlocModule<ChatListBloc, LoadableState<ChatListState>>(
-        create: (_) => ChatListBloc(),
-        child: (context, bloc, _) => const _ChatListView(),
-      );
+  Widget build(BuildContext context) => const _ChatListView();
 }
 
 class _ChatListView extends StatefulWidget {
@@ -65,14 +62,6 @@ class _ChatListViewState extends State<_ChatListView> {
     final resolved = AppRoutes.resolvePendingChat(context);
     if (resolved == null) return;
     AppRoutes.pendingChatToken.value = null;
-
-    // Replace any chat already pushed on top of the chat list so a freshly
-    // tapped notification doesn't stack indefinitely on previous chats.
-    final navigator = Navigator.of(context);
-    if (navigator.canPop()) {
-      navigator.popUntil((route) => route.isFirst);
-    }
-
     AppRoutes.openChatView(
       context,
       room: resolved.room,
@@ -193,7 +182,14 @@ class _ChatListViewState extends State<_ChatListView> {
                       .talkSettings
                       .drafts
                       .containsKey(room.token);
-                  return ChatTile(data: room, hasDraft: hasDraft);
+                  // Stable key keeps element identity across re-sorts so the
+                  // inner UserAvatar reuses its cached bytes instead of
+                  // flashing on every list update.
+                  return ChatTile(
+                    key: ValueKey(room.token),
+                    data: room,
+                    hasDraft: hasDraft,
+                  );
                 }).toList(),
               );
             },