修复刷新页面后停止按钮消失：从后端任务派生 activeBatchIds 驱动停止按钮显示与停止目标

web/frontend/src/pages/DouyuTasksPage.tsx

@@ -447,6 +447,17 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
     return set;
   }, [visibleTasks]);
 
+  // 从后端任务派生正在运行的批次 ID（刷新页面后仍可恢复，用于显示停止按钮）
+  const activeBatchIds = useMemo(() => {
+    const set = new Set<string>();
+    for (const task of visibleTasks) {
+      if (['pending', 'running', 'planned'].includes(task.status) && task.batch_id) {
+        set.add(task.batch_id);
+      }
+    }
+    return set;
+  }, [visibleTasks]);
+
   const selectedHasRunning = selectedIds.some((id) => runningAccountIds.has(id));
 
   // 有活跃任务或 WS 连接时 3 秒刷 tasks；空闲 15 秒轻量刷新
@@ -595,9 +606,10 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
   };
 
   const stopBatch = async () => {
-    if (runningBatchIds.size === 0) return;
+    const ids = Array.from(new Set([...runningBatchIds, ...activeBatchIds]));
+    if (ids.length === 0) return;
     try {
-      await Promise.all(Array.from(runningBatchIds).map((id) => douyuApi.stopBatch(id)));
+      await Promise.all(ids.map((id) => douyuApi.stopBatch(id)));
       message.success('已停止');
     } catch (error) {
       message.error(getErrorMessage(error));
@@ -1122,7 +1134,7 @@ export default function DouyuTasksPage({ handbook }: { handbook: HandbookKind })
         <Space>
           <Button icon={<ReloadOutlined />} onClick={loadData} loading={loading}>刷新</Button>
           {canConfig && <Button icon={<SettingOutlined />} onClick={() => setConfigOpen(true)}>配置</Button>}
-          {runningBatchIds.size > 0 && <Button danger icon={<StopOutlined />} onClick={stopBatch}>停止</Button>}
+          {(activeBatchIds.size > 0 || runningBatchIds.size > 0) && <Button danger icon={<StopOutlined />} onClick={stopBatch}>停止</Button>}
         </Space>
       </Space>