change: 获取po详情 数据逻辑调整.

src/pages/purchase-order/edit.vue

@@ -1346,7 +1346,9 @@ const getPurchaseOrdersData = function () {
           reject(false)
           return
         }
-        const res = response.data.result[0]
+        const res = Array.isArray(response.data.result)
+          ? response.data.result[0]
+          : response.data.result
 
         longPONumber.value = res.PO_Number || ''
         PONumber.value = res.Purchase_Order_Number || ''