feat(ECR-021): AICoreConfig SystemPrompt 只读并 Closed

新增 system_prompts 目录、admin.ai_config.read 与 admin-h5「AI」页；本切片不改运行时 Prompt、禁写发布/UGC/真支付。

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

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

@@ -19,6 +19,7 @@ const router = createRouter({
         { path: 'codes', name: 'codes', component: () => import('@/pages/RedemptionPage.vue') },
         { path: 'ask', name: 'ask', component: () => import('@/pages/AskPage.vue') },
         { path: 'safety', name: 'safety', component: () => import('@/pages/SafetyPage.vue') },
+        { path: 'ai', name: 'ai', component: () => import('@/pages/AIConfigPage.vue') },
         { path: 'audit', name: 'audit', component: () => import('@/pages/AuditPage.vue') },
       ],
     },