fix: 批量卸载时版本列显示loading(对齐安装/升级逻辑)

frontend/src/components/monitor/dashboard/GrafanaDashboard.tsx

@@ -65,12 +65,13 @@ const AgentTab: React.FC = () => {
     const ok = await _confirm({ title: '批量卸载 Agent', description: `确定卸载选中的 ${selIds.length} 台主机的 AIOps Agent？卸载将在后台异步执行。`, confirmText: '卸载', variant: 'destructive' });
     if (!ok) return;
     setBatchUninstalling(true);
+    setOperating(new Set(selIds));
     try {
       await agentApi.batchUninstall(selIds);
       toast.success(`已提交：批量卸载 ${selIds.length} 台主机的 Agent，后台执行中，30秒后自动刷新`);
       setSelected(new Set());
-      setTimeout(() => fetch(), 30000);
-    } catch { toast.error('提交失败'); }
+      setTimeout(() => { fetch(); setOperating(new Set()); }, 30000);
+    } catch { toast.error('提交失败'); setOperating(new Set()); }
     finally { setBatchUninstalling(false); }
   };
   const totalPages = Math.max(1, Math.ceil(hosts.length / pageSize));