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/features/orders/api/orders.ts

@@ -2,6 +2,7 @@ import { apiClient } from '@/shared/api/client'
 import type { ApiResponse, PaginatedResult } from '@/shared/types/types'
 import type { HandoffStatus, OrderStatus, SettlementStatus } from '@/shared/types/status'
 import { yuanToCent } from '@/shared/utils/money'
+import { getTrackCode } from '@/shared/utils/trackCode'
 
 export interface Order {
   id: number
@@ -280,7 +281,12 @@ export async function fetchOrder(id: string | number) {
 }
 
 export async function createOrder(listingId: number) {
-  const { data } = await apiClient.post<ApiResponse<Order>>('/orders', { listing_id: listingId })
+  const trackCode = getTrackCode()
+  const payload: Record<string, unknown> = { listing_id: listingId }
+  if (trackCode) {
+    payload.track_code = trackCode
+  }
+  const { data } = await apiClient.post<ApiResponse<Order>>('/orders', payload)
   return data.data
 }