feat(adtracking): 新增推广链接追踪与数据大盘，支持自定义短码、注册与下单归因及二维码物料生成

1. 数据库新增 000064_ad_tracking.sql 迁移，创建 ad_tracking_links 和 ad_tracking_clicks 表，并在 users、rental_orders 增加归因字段
2. 后端新增 adtracking 模块，挂载 GET /r/:code 302 智能重定向、点击流水异步记录、转化率/GMV聚合统计及管理接口
3. 用户认证 (auth) 与订单创建 (order) 链路贯通，实现注册用户与订单成交推广短码全链路归因
4. 前端管理后台左侧新增【推广追踪】目录，支持大盘指标总览、推广链接 CRUD、状态启停、一键复制短链及二维码下载 (PNG)

frontend/src/router/adminRoutes.ts

@@ -216,4 +216,10 @@ export const adminRoutes: RouteRecordRaw[] = [
     component: () => import('@/features/admin/views/AdminAnnouncementsView.vue'),
     meta: adminMeta,
   },
+  {
+    path: adminPath('tracking-links'),
+    name: 'admin-tracking-links',
+    component: () => import('@/features/admin/views/AdminTrackingLinksView.vue'),
+    meta: adminMeta,
+  },
 ]

frontend/src/router/index.ts

@@ -10,6 +10,7 @@ import { isMobileHost, isMobileDevice, getMobilePath, getPcPath } from './mobile
 import { mobileRoutes } from './mobileRoutes'
 import { publicRoutes } from './publicRoutes'
 import { sellerRoutes } from './sellerRoutes'
+import { saveTrackCode } from '@/shared/utils/trackCode'
 
 const router = createRouter({
   history: createWebHistory(),
@@ -27,6 +28,10 @@ const router = createRouter({
 })
 
 router.beforeEach(async to => {
+  if (to.query.track_code) {
+    saveTrackCode(String(to.query.track_code))
+  }
+
   const isMobile = isMobileHost() || isMobileDevice()
 
   if (isMobile) {