refactor(delivery): 优化发货清单导出功能

- 移除手动序号生成逻辑
- 使用服务层方法替代流式处理转换
- 简化数据获取流程
- 提高代码可读性
- 减少内存占用
- 提升性能表现

nflg-wms-shipment/src/main/java/com/nflg/wms/shipment/controller/DeliveryController.java

@@ -202,17 +202,17 @@ public class DeliveryController extends BaseController {
     public void exportItemToExcel(HttpServletResponse response, @RequestParam Long id) throws IOException {
         WmsShipmentDelivery delivery = deliveryService.getById(id);
         VUtil.trueThrowBusinessError(Objects.isNull(delivery)).throwMessage("清单不存在");
-        AtomicInteger index = new AtomicInteger(1);
-        List<ShipmentMaterialCodeItemVO> list = deliveryItemService.lambdaQuery()
-                .eq(WmsShipmentDeliveryItem::getDeliveryId, id)
-                .orderByAsc(WmsShipmentDeliveryItem::getId)
-                .list()
-                .stream().map(item -> {
-                    ShipmentMaterialCodeItemVO vo = Convert.convert(ShipmentMaterialCodeItemVO.class, item);
-                    vo.setIndex(index.getAndIncrement());
-                    return vo;
-                }).toList();
-//        List<ShipmentMaterialCodeItemVO> list = deliveryItemService.getItemsVO(id);
+//        AtomicInteger index = new AtomicInteger(1);
+//        List<ShipmentMaterialCodeItemVO> list = deliveryItemService.lambdaQuery()
+//                .eq(WmsShipmentDeliveryItem::getDeliveryId, id)
+//                .orderByAsc(WmsShipmentDeliveryItem::getId)
+//                .list()
+//                .stream().map(item -> {
+//                    ShipmentMaterialCodeItemVO vo = Convert.convert(ShipmentMaterialCodeItemVO.class, item);
+//                    vo.setIndex(index.getAndIncrement());
+//                    return vo;
+//                }).toList();
+        List<ShipmentMaterialCodeItemVO> list = deliveryItemService.getItemsVO(id);
         response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
         response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + URLEncoder.encode("发货清单-" + delivery.getNo() + ".xlsx", StandardCharsets.UTF_8));
         new Workbook()