fix(pdd-extension): 拼多多官方接口频控(40002)容错与轻量探测，避免有效 Cookie 被拒

apps/backend/src/services/platforms/pdd/pdd-client.ts

@@ -46,6 +46,7 @@ export interface PddOrderQueryResult {
 
 export interface PddTestCookieResult {
   valid: boolean
+  rateLimited?: boolean | undefined
   message: string
   totalOrders?: number | undefined
   firstOrderSn?: string | undefined
@@ -253,16 +254,19 @@ export class PddClient {
     })
 
     try {
+      const nowSec = Math.floor(Date.now() / 1000)
       const result = await client.queryRecentOrders({
         pageNumber: 1,
         pageSize: 1,
-        orderType: 0,
+        orderType: 2, // 2: 已发货 (比 orderType: 0 扫描全量库更轻量，不容易触发拼多多 MMS 网关频控)
+        startTime: nowSec - 86400 * 7, // 探测最近 7 天
+        endTime: nowSec,
       })
 
       const firstItem = result.items[0]
       return {
         valid: true,
-        message: `Cookie 有效，网关校验通过（店铺在售/历史订单数: ${result.total}）`,
+        message: `Cookie 有效，网关校验通过（近期订单数: ${result.total}）`,
         totalOrders: result.total,
         firstOrderSn: firstItem?.order_sn,
       }
@@ -279,9 +283,10 @@ export class PddClient {
           message: `Cookie 已失效或登录已过期: ${errMsg}`,
         }
       }
-      if (errMsg.includes('40002') || errMsg.includes('频控')) {
+      if (errMsg.includes('40002') || errMsg.includes('频控') || errMsg.includes('频繁')) {
         return {
           valid: false,
+          rateLimited: true,
           message: `触发网关频控 (40002): 操作过于频繁，请稍后重试`,
         }
       }