fix: harden dependencies and downstream delivery

src/layouts/AdminLayout.tsx

@@ -38,16 +38,13 @@ import { AppShell } from '@/layouts/AppShell';
 export function AdminLayout() {
   const session = readSession();
   const [pendingAudits, setPendingAudits] = useState({ enterpriseCertifications: 0, smsAudits: 0, templates: 0, signatures: 0, drainageInfos: 0 });
-  const [downstreamAlertCount, setDownstreamAlertCount] = useState(0);
   const loadPendingAuditCount = useCallback(() => {
     adminApi.getDashboard()
       .then((dashboard) => {
         setPendingAudits(dashboard.pendingAudits ?? { enterpriseCertifications: 0, smsAudits: 0, templates: 0, signatures: 0, drainageInfos: 0 });
-        setDownstreamAlertCount(dashboard.downstreamDeliverySummary?.alertCount ?? 0);
       })
       .catch(() => {
         setPendingAudits({ enterpriseCertifications: 0, smsAudits: 0, templates: 0, signatures: 0, drainageInfos: 0 });
-        setDownstreamAlertCount(0);
       });
   }, []);
 
@@ -83,7 +80,6 @@ export function AdminLayout() {
         { label: '模板待审', count: pendingAudits.templates, to: '/admin/templates' },
         { label: '签名待审', count: pendingAudits.signatures, to: '/admin/signatures' },
         { label: '引流信息待审', count: pendingAudits.drainageInfos, to: '/admin/drainage-audits' },
-        { label: '下游投递告警', count: downstreamAlertCount, to: '/admin/downstream-deliveries' },
       ]}
       navSections={[
         {