fix(ApprovalApiController): 添加订单商品状态检查防止重复退货

在提交退货审批前增加状态检查，避免状态为退货中或已退货的商品重复提交退货申请

agileboot-api/src/main/java/com/agileboot/api/controller/ApprovalApiController.java

@@ -174,6 +174,9 @@ public class ApprovalApiController {
         if (null == orderGoods) {
             return ResponseDTO.fail(new ApiException(ErrorCode.Internal.INTERNAL_ERROR, "订单商品不存在"));
         }
+        if (orderGoods.getStatus().equals(2) || orderGoods.getStatus().equals(5)) {
+            return ResponseDTO.fail(new ApiException(ErrorCode.Internal.INTERNAL_ERROR, "订单商品状态为退货中或已退货"));
+        }
 
         // 执行业务逻辑
         ReturnApprovalEntity returnApproval = approvalApplicationService.submitApproval(command, orderGoods);