feat(douyu): 新增和平小店查询模块(绑定角色/商品列表/点券余额)

- activity_client: getIframeUrl 签发 code/sig,道聚城 getrole.out/recommend/balance 接口
  (2026-08 起需 isCode=1 + authType=delegate + sAnchorId 才能通过 Livelink 校验)
- 迁移 0016: accounts xpd_* 字段、douyu_config 小店配置(actAlias/actId/rid)、
  douyu_xpd_goods_snapshot 商品快照表
- runner/service/router/schema 注册 query_xpd_role/refresh_xpd_goods/query_xpd_balance
  三个任务,任务结果剥离 role.raw 防 openid 泄露
- 前端: 和平小店路由/菜单/DouyuTasksPage 三态/商品下拉/配置弹窗

web/frontend/src/layouts/MainLayout.tsx

@@ -6,7 +6,7 @@ import {
   CloudServerOutlined, TeamOutlined, ApiOutlined, KeyOutlined,
   MenuFoldOutlined, MenuUnfoldOutlined, SwapOutlined,
   SunOutlined, MoonOutlined, DesktopOutlined, GiftOutlined, ShoppingCartOutlined, ApartmentOutlined, MobileOutlined,
-  BookOutlined, TrophyOutlined,
+  BookOutlined, TrophyOutlined, ShopOutlined,
   SafetyCertificateOutlined,
 } from '@ant-design/icons';
 import { useNavigate, useLocation, Outlet } from 'react-router-dom';
@@ -74,6 +74,7 @@ export default function MainLayout({ onLogout }: { onLogout?: () => void }) {
   if (can('douyu:task')) {
     douyuItems.push({ key: '/douyu/elite', label: '精英宝典', icon: <BookOutlined /> });
     douyuItems.push({ key: '/douyu/esports', label: '电竞手册', icon: <TrophyOutlined /> });
+    douyuItems.push({ key: '/douyu/peace', label: '和平小店', icon: <ShopOutlined /> });
   }
 
   // 虎牙