feat(pdd): 拼多多订单支持 out_sku_sn 匹配与浏览器插件加密保活

- 拼多多进单 Cookie 失效即时拦截与告警修复（支持 43001 会话过期等错误识别）
- 拼多多订单映射优先使用 out_sku_sn（外部商家编码）作为商品规格与工单匹配核心字段
- 新增 Chrome/Edge 浏览器扩展 (Manifest V3)，支持端到端 RSA-OAEP + AES-256-GCM 信封加密自动保活
- 后台店铺管理新增插件配对面板、专属密钥管理与一键导入配置 JSON

apps/backend/src/routes/admin/platform-config/pdd.ts

@@ -13,6 +13,7 @@ import {
   deletePddStore,
   getPddStoreById,
   updatePddStoreCheckStatus,
+  generatePddStoreSyncToken,
 } from '../../../services/platforms/pdd/pdd-source-config-service.js'
 import { notifyPddCookieExpired } from '../../../services/notification/domain-notifications.js'
 import {
@@ -102,6 +103,35 @@ router.delete(
   }),
 )
 
+/**
+ * POST /platform-config/pdd/stores/:shopId/sync-token
+ * 为指定拼多多店铺生成或重置浏览器插件配对密钥。
+ */
+router.post(
+  '/pdd/stores/:shopId/sync-token',
+  createJsonHandler(
+    async (req) => {
+      const syncToken = await generatePddStoreSyncToken(req.params.shopId)
+      const store = getPddStoreById(req.params.shopId)
+      return {
+        shopId: req.params.shopId,
+        shopName: store?.shopName || req.params.shopId,
+        syncToken,
+      }
+    },
+    {
+      successMessage: '店铺插件配对密钥已生成',
+      errorMessage: '生成插件配对密钥失败',
+      scope: '[admin/platform-config/pdd/stores/:shopId/sync-token]',
+      audit: (req) => ({
+        action: 'platform_pdd_store_token_generated',
+        targetType: 'platform_store',
+        targetId: String(req.params.shopId || ''),
+      }),
+    },
+  ),
+)
+
 /**
  * POST /platform-config/pdd/test-cookie
  * Test Cookie validity for a given cookie string or an existing shop.