feat(ECR-017): AskOperations 问答会话只读并 Closed

新增 admin.ask.read、GET /admin/ask/threads*（AskSessionView）与 admin-h5「问答」页；禁改消息/UGC/真支付。

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

apps/admin-h5/src/router/index.ts

@@ -17,6 +17,7 @@ const router = createRouter({
         { path: 'orders', name: 'orders', component: () => import('@/pages/OrdersPage.vue') },
         { path: 'plans', name: 'plans', component: () => import('@/pages/MembershipPlansPage.vue') },
         { path: 'codes', name: 'codes', component: () => import('@/pages/RedemptionPage.vue') },
+        { path: 'ask', name: 'ask', component: () => import('@/pages/AskPage.vue') },
         { path: 'audit', name: 'audit', component: () => import('@/pages/AuditPage.vue') },
       ],
     },