优化配送订单收货地址联动显示

backend/api/internal/logic/platform/user/relation.go

@@ -4,6 +4,7 @@ package user
 
 import (
 	"errors"
+	"strings"
 
 	"git.apinb.com/bsm-sdk/core/errcode"
 	"git.apinb.com/bsm-sdk/core/infra"
@@ -28,6 +29,7 @@ func ListUserAddress(ctx *gin.Context) {
 	var list []models.UserAddress
 	var total int64
 	query := common.ApplyKeywordFilter(ctx, common.ActiveRecords(impl.DBService.Model(&models.UserAddress{})), &models.UserAddress{})
+	query = filterUserAddressByContract(query, ctx.Query("gasorder_contract_identity"))
 	if err := query.Count(&total).Error; err != nil {
 		infra.Response.Error(ctx, err)
 		return
@@ -45,6 +47,17 @@ func ListUserAddress(ctx *gin.Context) {
 	infra.Response.Success(ctx, gin.H{"total": total, "list": restoreUserAddressLocations(protected, list)})
 }
 
+// filterUserAddressByContract 仅返回指定配送合同签约用户的地址，避免后台下单时跨用户选择。
+func filterUserAddressByContract(query *gorm.DB, contractIdentity string) *gorm.DB {
+	contractIdentity = strings.TrimSpace(contractIdentity)
+	if contractIdentity == "" {
+		return query
+	}
+	contractUser := common.ActiveRecords(impl.DBService.Model(&models.GasorderContract{})).
+		Select("user_account_id").Where("identity = ?", contractIdentity)
+	return query.Where("user_account_id = (?)", contractUser)
+}
+
 // GetUserAddress 查询用户地址详情，并返回详情与编辑页需要的地址和坐标。
 func GetUserAddress(ctx *gin.Context) {
 	var address models.UserAddress