fix(delivery): 提货详情页自动回填 Rock 绑定的游戏角色名与区服

1. 解决提货页历史已交付订单缺失角色名的问题：在 buildDeliveryState 中新增自动回溯机制，若订单 ResultData 缺失角色名或区服，自动从关联的 rock_tokens 表提取 actual_role_name 与 actual_channel；
2. 自动修正并持久化：回填成功后自动修补至 fulfillment_orders.result_data，确保后续无需重复反查，提货页与凭据大图立即可见真实游戏昵称。

backend/internal/service/delivery.go

@@ -895,6 +895,33 @@ func (s *DeliveryService) buildDeliveryState(openOrder *OpenOrderQuery, order *m
 		}
 	}
 
+	roleName := openOrder.RoleName
+	if roleName == "" {
+		roleName = resultDataString(order.ResultData, "role_name")
+	}
+	gameChannel := openOrder.GameChannel
+	if gameChannel == "" {
+		gameChannel = resultDataString(order.ResultData, "game_channel")
+	}
+	// 若角色名或区服为空，尝试从关联的 rock_tokens 表反查并自动回填
+	if (roleName == "" || gameChannel == "") && s.fulfillment != nil && s.fulfillment.db != nil {
+		var rockToken model.RockToken
+		if err := s.fulfillment.db.Where("assigned_order_no = ?", order.OrderNo).First(&rockToken).Error; err == nil {
+			patches := map[string]interface{}{}
+			if roleName == "" && rockToken.ActualRoleName != "" {
+				roleName = rockToken.ActualRoleName
+				patches["role_name"] = roleName
+			}
+			if gameChannel == "" && rockToken.ActualChannel != "" {
+				gameChannel = rockToken.ActualChannel
+				patches["game_channel"] = gameChannel
+			}
+			if len(patches) > 0 {
+				_ = s.persistOrderResultPatch(order, patches)
+			}
+		}
+	}
+
 	info := &DeliveryOrderInfo{
 		OrderNo:          openOrder.OrderNo,
 		Status:           openOrder.Status,
@@ -908,9 +935,9 @@ func (s *DeliveryService) buildDeliveryState(openOrder *OpenOrderQuery, order *m
 		CreatedAt:        openOrder.CreatedAt,
 		ShippedAt:        openOrder.ShippedAt,
 		ShipFailReason:   openOrder.ShipFailReason,
-		GameChannel:      openOrder.GameChannel,
+		GameChannel:      gameChannel,
 		GameUID:          openOrder.GameUID,
-		RoleName:         openOrder.RoleName,
+		RoleName:         roleName,
 		PayScore:         openOrder.PayScore,
 		Data:             requestDataMap(order.RequestData),
 		Good:             goodData,