refactor(workbench): remove redundant notification state

src/features/workbench/hooks/use-operational-tasks.ts

@@ -71,11 +71,8 @@ export function useOperationalTasks(
   const acknowledgeEventsThrough = sync.acknowledgeEventsThrough;
   const [tasks, setTasks] = useState<OperationalTask[]>([]);
   const [notifications, setNotifications] = useState<OperationalTaskNotification[]>([]);
-  const [available, setAvailable] = useState(false);
-  const activatedRef = useRef(false);
   const tasksRef = useRef<OperationalTask[]>([]);
   const [error, setError] = useState<string | null>(null);
-  const [lastSyncedAt, setLastSyncedAt] = useState<string | null>(null);
   const [loading, setLoading] = useState(true);
   const [refreshGeneration, setRefreshGeneration] = useState(0);
   const forceRefreshRef = useRef(false);
@@ -111,13 +108,9 @@ export function useOperationalTasks(
         detailResetGenerationRef.current = sync.detailResetGeneration;
         setTasks(nextTasks);
         setNotifications(selectHeaderNotifications(sync.snapshot?.notifications ?? []));
-        setAvailable(true);
-        activatedRef.current = true;
         setError(null);
-        setLastSyncedAt(new Date().toISOString());
       } catch (nextError) {
         if (controller.signal.aborted) return;
-        if (!activatedRef.current) setAvailable(false);
         setError(nextError instanceof Error ? nextError.message : "工况任务服务暂时不可用。");
       } finally {
         if (!controller.signal.aborted) {
@@ -159,7 +152,6 @@ export function useOperationalTasks(
           ...tasksRef.current.filter((task) => !changed.has(task.task_id))
         ];
         setTasks(tasksRef.current);
-        setLastSyncedAt(new Date().toISOString());
       }
       acknowledgeEventsThrough(lastSequence);
     }).catch((nextError) => {
@@ -189,11 +181,8 @@ export function useOperationalTasks(
     }, getAccessToken);
     tasksRef.current = [task, ...tasksRef.current.filter((item) => item.task_id !== task.task_id)];
     setTasks(tasksRef.current);
-    activatedRef.current = true;
-    setAvailable(true);
     setLoading(false);
     setError(null);
-    setLastSyncedAt(new Date().toISOString());
     return task;
   }, [getAccessToken]);
 
@@ -300,10 +289,7 @@ export function useOperationalTasks(
     fetchOperationalTaskEvidenceSnapshot(taskId, evidenceId, getAccessToken), [getAccessToken]);
 
   return {
-    available,
     error: error ?? sync.error,
-    syncStatus: sync.status,
-    lastSyncedAt,
     loading,
     tasks,
     conditions,