Improve WeChat MP replies and ship MindSpace/H5 production updates.

Add WeChat service account routing with sync acks, connectivity tests, and context isolation; document deploy runbooks; and bundle related MindSpace, voice, Plaza, and server gateway changes for production rollout.

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

ops/src/components/AdminLayout.tsx

@@ -5,6 +5,7 @@ const links = [
   { to: '/admin/users', label: '用户管理' },
   { to: '/admin/llm', label: 'LLM 配置' },
   { to: '/admin/billing', label: '账单记录' },
+  { to: '/admin/wechat', label: '服务号管理' },
 ];
 
 export function AdminLayout() {
@@ -12,7 +13,7 @@ export function AdminLayout() {
     <div className="layout">
       <header>
         <h1>超级管理后台</h1>
-        <p style={{ color: '#68716c' }}>用户、计费与 LLM 配置</p>
+        <p style={{ color: '#68716c' }}>用户、计费、LLM 与服务号</p>
       </header>
       <nav className="nav">
         <NavLink