Implemented per stream subscription recovery with polling fallback

lib/screens/tasks/task_detail_screen.dart

@@ -239,7 +239,7 @@ class _TaskDetailScreenState extends ConsumerState<TaskDetailScreen>
 
     final realtime = ref.watch(realtimeControllerProvider);
     final isRetrieving =
-        realtime.isConnecting ||
+        realtime.isAnyStreamRecovering ||
         tasksAsync.isLoading ||
         ticketsAsync.isLoading ||
         officesAsync.isLoading ||
@@ -2684,37 +2684,46 @@ class _TaskDetailScreenState extends ConsumerState<TaskDetailScreen>
     final typingController = _maybeTypingController(typingChannelId);
     typingController?.stopTyping();
 
-    final message = await ref
-        .read(ticketsControllerProvider)
-        .sendTaskMessage(
-          taskId: task.id,
-          ticketId: task.ticketId,
-          content: content,
-        );
+    // Capture mentioned user ids and clear the composer immediately so the
+    // UI does not block while the network call completes. Perform the send
+    // and mention notification creation in a background Future.
     final mentionUserIds = _extractMentionedUserIds(
       content,
       profiles,
       currentUserId,
     );
-    if (mentionUserIds.isNotEmpty && currentUserId != null) {
-      await ref
-          .read(notificationsControllerProvider)
-          .createMentionNotifications(
-            userIds: mentionUserIds,
-            actorId: currentUserId,
-            ticketId: task.ticketId,
-            taskId: task.id,
-            messageId: message.id,
-          );
-    }
-    ref.invalidate(taskMessagesProvider(task.id));
-    if (task.ticketId != null) {
-      ref.invalidate(ticketMessagesProvider(task.ticketId!));
-    }
     if (mounted) {
       _messageController.clear();
       _clearMentions();
     }
+
+    Future(() async {
+      try {
+        final message = await ref
+            .read(ticketsControllerProvider)
+            .sendTaskMessage(
+              taskId: task.id,
+              ticketId: task.ticketId,
+              content: content,
+            );
+
+        if (mentionUserIds.isNotEmpty && currentUserId != null) {
+          try {
+            await ref
+                .read(notificationsControllerProvider)
+                .createMentionNotifications(
+                  userIds: mentionUserIds,
+                  actorId: currentUserId,
+                  ticketId: task.ticketId,
+                  taskId: task.id,
+                  messageId: message.id,
+                );
+          } catch (_) {}
+        }
+      } catch (e, st) {
+        debugPrint('sendTaskMessage error: $e\n$st');
+      }
+    });
   }
 
   void _handleComposerChanged(

lib/screens/tasks/tasks_list_screen.dart

@@ -104,7 +104,7 @@ class _TasksListScreenState extends ConsumerState<TasksListScreen>
     final realtime = ref.watch(realtimeControllerProvider);
 
     final showSkeleton =
-        realtime.isConnecting ||
+        realtime.isAnyStreamRecovering ||
         tasksAsync.maybeWhen(loading: () => true, orElse: () => false) ||
         ticketsAsync.maybeWhen(loading: () => true, orElse: () => false) ||
         officesAsync.maybeWhen(loading: () => true, orElse: () => false) ||
@@ -534,7 +534,7 @@ class _TasksListScreenState extends ConsumerState<TasksListScreen>
               ),
             ),
           ),
-        const ReconnectOverlay(),
+        const ReconnectIndicator(),
       ],
     );
   }