feat(wms): 添加钢卷物料统计数据接口

- 在 IWmsMaterialCoilService 中新增 getStatistics 方法用于汇总统计
- 在 WmsMaterialCoilController 中添加 /statisticsList 接口
- 在 WmsMaterialCoilMapper 中新增 selectStatistics 查询方法
- 在 WmsMaterialCoilMapper.xml 中实现统计 SQL 查询
- 在 WmsMaterialCoilServiceImpl 中实现统计业务逻辑
- 支持按筛选条件统计总毛重、总净重和总数
- 采用高性能查询方式只查询 sum/count 聚合数据
- 独立统计接口不影响原有分页查询功能

klp-wms/src/main/resources/mapper/klp/WmsMaterialCoilMapper.xml

@@ -902,5 +902,27 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
           )
     </select>
 
+    <!-- 统计筛选条件下的全量汇总数据（高性能：只查sum/count） -->
+    <select id="selectStatistics" resultType="java.util.Map">
+        SELECT
+            IFNULL(SUM(mc.gross_weight), 0) AS total_gross_weight,
+            IFNULL(SUM(mc.net_weight), 0) AS total_net_weight,
+            COUNT(mc.coil_id) AS total_count
+        FROM wms_material_coil mc
+        LEFT JOIN wms_warehouse w ON mc.warehouse_id = w.warehouse_id
+        LEFT JOIN wms_warehouse nw ON mc.next_warehouse_id = nw.warehouse_id
+        LEFT JOIN wms_actual_warehouse aw ON mc.actual_warehouse_id = aw.actual_warehouse_id
+        LEFT JOIN sys_user su ON mc.sale_id = su.user_id
+        LEFT JOIN wms_raw_material rm ON mc.item_type = 'raw_material' AND mc.item_id = rm.raw_material_id
+        LEFT JOIN wms_product p ON mc.item_type = 'product' AND mc.item_id = p.product_id
+        LEFT JOIN (
+            SELECT coil_id, COUNT(*) AS abnormal_count
+            FROM wms_coil_abnormal
+            WHERE del_flag = 0
+            GROUP BY coil_id
+        ) ca ON mc.coil_id = ca.coil_id
+        ${ew.customSqlSegment}
+    </select>
+
 </mapper>