feat(admin): LLM config, knowledge base, and WeCom AI binding

Add owner-scoped model API settings, uploadable knowledge bases, and WeCom bot AI/KB wiring with OpenAI-compatible URL normalization.

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

apps/admin-web/src/layouts/AdminLayout.tsx

@@ -3,6 +3,7 @@ import { Outlet, useLocation, useNavigate } from 'react-router-dom';
 import { Layout, Menu, Typography, Button, Space } from 'antd';
 import type { MenuProps } from 'antd';
 import {
+  RobotOutlined,
   DashboardOutlined,
   UserOutlined,
   ShoppingOutlined,
@@ -42,6 +43,8 @@ const MENU_ITEMS: MenuProps['items'] = [
   { key: '/orders', icon: <ShoppingOutlined />, label: '订单' },
   { key: '/promo-codes', icon: <GiftOutlined />, label: '推广码' },
   { key: '/wecom-bots', icon: <TeamOutlined />, label: '企微机器人' },
+  { key: '/llm-configs', icon: <RobotOutlined />, label: '语言模型' },
+  { key: '/knowledge-bases', icon: <FileTextOutlined />, label: '知识库' },
   {
     key: 'stores-group',
     icon: <ShopOutlined />,
@@ -137,6 +140,8 @@ function menuAllowed(key: string, permissionKeys: string[]): boolean {
     '/orders': 'orders',
     '/promo-codes': 'promo_codes',
     '/wecom-bots': 'wecom_bots',
+    '/llm-configs': 'llm_configs',
+    '/knowledge-bases': 'knowledge_bases',
     'stores-group': 'stores',
     '/stores': 'stores',
     '/store-categories': 'stores',