simplified loadable state logic by removing connectivity debouncing and inlining indicator helpers; updated error bar visibility and chat list polling behavior

lib/app.dart

@@ -62,7 +62,7 @@ class _AppState extends State<App> with WidgetsBindingObserver {
     _syncChatListPolling();
   }
 
-  void _syncChatListPolling() {
+  void _syncChatListPolling({bool refresh = true}) {
     if (!mounted) return;
     final modules = AppModule.getBottomBarModules(context);
     final talkSlot = modules.indexWhere((m) => m.module == Modules.talk);
@@ -72,7 +72,7 @@ class _AppState extends State<App> with WidgetsBindingObserver {
     bloc.setAutoRefreshInterval(
       talkIsActive ? _chatListActiveInterval : _chatListIdleInterval,
     );
-    if (talkIsActive) bloc.refresh();
+    if (talkIsActive && refresh) bloc.refresh();
   }
 
   // Wall-clock throttle rather than Debouncer.throttle: a Timer does not tick
@@ -103,7 +103,14 @@ class _AppState extends State<App> with WidgetsBindingObserver {
         log('Refreshing due to LifecycleChange');
         NotificationTasks.updateProviders(context);
       });
+      // updateProviders already refreshes the chat list; only re-arm the poll.
+      _syncChatListPolling(refresh: false);
       _handlePendingWidgetNavigation();
+    } else if (mounted) {
+      // Stop polling while backgrounded: a silent refresh failing in the
+      // background would otherwise leave an error that flashes on the next
+      // resume before the foreground refetch replaces it.
+      context.read<ChatListBloc>().setAutoRefreshInterval(null);
     }
   }