feat(h5): add LLM intent router admin controls and shadow verification.

Expose shadow/canary router policy in ops admin, add FAQ rule fast-path,
and tighten router defaults (1200ms timeout, 0.65 confidence).
Includes verify-h5-llm-router-shadow for production canary rollout.

Co-authored-by: Cursor <cursoragent@cursor.com>

ops/src/components/AdminLayout.tsx

@@ -8,6 +8,7 @@ const links = [
   { to: '/admin/agent-code-run', label: 'Code Run' },
   { to: '/admin/policy', label: '策略中心' },
   { to: '/admin/orchestrator', label: '任务编排' },
+  { to: '/admin/llm', label: '统一大模型' },
 ];
 
 export function AdminLayout() {