对照生产抓包修复发货链路：BFF 地址、上游单号取值与直判交付

- DELIVERY_BFF_BASE_URL 默认改为 https://www.jxya.top/bff（生产实际路径，非 bff-stg）
- provider_order_no 取值优先级调整为 order_no/_id/id/order_sn：抓包确认 order_sn 为平台单号回显，上游真实单号是 _id
- 上游创建订单响应 status=FINISHED 或 send_status=SUCCESS 时订单直接置为 delivered，无需等待 ship-notify
- 同步更新单测（mock 上游返回 _id/order_sn/FINISHED/SUCCESS）

backend/internal/service/delivery.go

@@ -22,7 +22,7 @@ import (
 	"gorm.io/gorm/clause"
 )
 
-const defaultDeliveryBFFBaseURL = "https://www.jxya.top/bff-stg"
+const defaultDeliveryBFFBaseURL = "https://www.jxya.top/bff"
 
 // 发货提交阶段，持久化在 result_data.provider_order_stage 中，供排障与补偿扫描区分处理。
 const (
@@ -339,9 +339,9 @@ func (s *DeliveryService) submit(orderNo, gameAccount, bindUUID string, apiClien
 	}
 	providerOrderNo := firstNonEmpty(
 		stringFromMap(upstreamOrder, "order_no"),
-		stringFromMap(upstreamOrder, "order_sn"),
 		stringFromMap(upstreamOrder, "_id"),
 		stringFromMap(upstreamOrder, "id"),
+		stringFromMap(upstreamOrder, "order_sn"),
 		queueOrderID,
 	)
 	resultData := mergeResultData(claimed.ResultData, map[string]interface{}{
@@ -353,11 +353,17 @@ func (s *DeliveryService) submit(orderNo, gameAccount, bindUUID string, apiClien
 		"game_channel":         gameChannelText(boundAccount),
 		"upstream_order":       upstreamOrder,
 	})
+	nextStatus := model.OrderStatusDelivering
+	message := "已提交上游发货，等待发货结果回传"
+	if upstreamDeliverySucceeded(upstreamOrder) {
+		nextStatus = model.OrderStatusDelivered
+		message = "上游已返回发货成功"
+	}
 	updated, err := s.fulfillment.UpdateFulfillment(FulfillmentUpdateInput{
 		MerchantID:      order.MerchantID,
 		APIClientID:     apiClientID,
 		OrderNo:         order.OrderNo,
-		Status:          model.OrderStatusDelivering,
+		Status:          nextStatus,
 		ProviderOrderNo: providerOrderNo,
 		ResultData:      resultData,
 	})
@@ -367,7 +373,7 @@ func (s *DeliveryService) submit(orderNo, gameAccount, bindUUID string, apiClien
 	return &DeliverySubmitResult{
 		OrderNo:         updated.OrderNo,
 		Status:          normalizeOrderStatus(updated),
-		Message:         "已提交上游发货，等待发货结果回传",
+		Message:         message,
 		ProviderOrderNo: providerOrderNo,
 		GameAccount:     boundAccount,
 		UpstreamOrder:   upstreamOrder,
@@ -574,6 +580,11 @@ func buildExistingDeliverySubmitResult(order *model.FulfillmentOrder) *DeliveryS
 	}
 }
 
+func upstreamDeliverySucceeded(order map[string]interface{}) bool {
+	return strings.EqualFold(stringFromMap(order, "status"), "FINISHED") ||
+		strings.EqualFold(stringFromMap(order, "send_status"), "SUCCESS")
+}
+
 func optionalUint(value uint) *uint {
 	if value == 0 {
 		return nil