feat(crm): 添加订单项统计功能

- 在CrmOrderItemController中新增三个统计接口：按订单ID、销售员、合同ID统计配卷汇总
- 实现resolveCoilIdsByOrderId、resolveCoilIdsBySalesman、resolveCoilIdsByContractId辅助方法
- 重构queryCoilsByOrderId、queryCoilsBySalesman、queryCoilsByContractIdPaginated方法逻辑
- 新增queryCoilsByOrderIdStatistics、queryCoilsBySalesmanStatistics、queryCoilsByContractIdStatistics统计方法
- 添加emptyStatistics私有方法返回默认统计值
- 在WmsDeliveryWaybillDetailController中新增按负责人统计已发货钢卷汇总接口

klp-wms/src/main/java/com/klp/controller/WmsDeliveryWaybillDetailController.java

@@ -203,4 +203,19 @@ public class WmsDeliveryWaybillDetailController extends BaseController {
         return iWmsMaterialCoilService.queryPageList(wmsMaterialCoilBo, pageQuery);
     }
 
+    /**
+     * 根据负责人(principal)统计已发货绑定钢卷的汇总数据（数量、毛重、净重）
+     */
+    @GetMapping("/coilListByPrincipal/statistics")
+    public R<java.util.Map<String, java.math.BigDecimal>> getCoilListByPrincipalStatistics(
+            @RequestParam(required = false) String principal) {
+        List<Long> boundCoilIds = iWmsDeliveryWaybillDetailService.getBoundCoilIdsByPrincipal(principal);
+        if (boundCoilIds == null || boundCoilIds.isEmpty()) {
+            return R.ok();
+        }
+        WmsMaterialCoilBo wmsMaterialCoilBo = new WmsMaterialCoilBo();
+        wmsMaterialCoilBo.setCoilIds(boundCoilIds.stream().map(String::valueOf).collect(Collectors.joining(",")));
+        return R.ok(iWmsMaterialCoilService.getStatistics(wmsMaterialCoilBo));
+    }
+
 }