fix(pdd): 拼多多商品名称仅展示规格spec，过滤冗长原标题

apps/backend/src/services/platforms/pdd/pdd-order-mapper.test.ts

@@ -45,7 +45,7 @@ test('mapPddOrderToSourceEvent maps PDD order into SourceOrderEvent', () => {
   const item = event.items[0]!
   assert.equal(item.itemId, '987654321')
   assert.equal(item.skuCode, '987654321')
-  assert.equal(item.skuName, '和平精英 198点券 (特惠礼包; 198点券)')
+  assert.equal(item.skuName, '特惠礼包; 198点券')
   assert.equal(item.quantity, 1)
   assert.equal((item.snapshot as Record<string, unknown>).buyerMemo, '游戏账号: 1008611')
 })

apps/backend/src/services/platforms/pdd/pdd-order-mapper.ts

@@ -77,7 +77,8 @@ export function mapPddOrderToSourceEvent(
   const spec = String(rawOrder.spec || '').trim()
   const quantity = Math.max(1, Number(rawOrder.goods_number || 1))
 
-  const skuName = spec ? `${goodsName} (${spec})` : goodsName
+  // 只展示规格 spec（若无规格则回退使用商品原名）
+  const skuName = spec || goodsName
   const externalSkuCode = goodsIdStr
 
   // Retain the entire raw snapshot dictionary as requested / 保留原始报文完整快照