feat(wms/coil): 新增钢卷理论长度字段并优化理论计算逻辑

1. 在钢卷物料实体类、业务对象、值对象及导出VO中新增理论长度（theoreticalLength）字段，并在映射文件中补充数据库映射关系
2. 重构理论计算工具方法，将原有的calculateTheoreticalThickness方法扩展为calculateTheoretical，支持同时计算理论厚度和理论长度
3. 理论长度计算公式：理论长度 = 净重(吨) × 1000 / 7.85 / 规格厚度(mm) / 规格宽度(mm) / 1000
4. 优化规格信息提取逻辑，统一从物品规格中解析厚度和宽度，避免重复代码
5. 在新增、修改、分卷、批量分卷等业务方法中调用新的计算逻辑，确保理论长度字段的自动填充

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

@@ -43,6 +43,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         <result property="specId" column="spec_id"/>
         <result property="versionId" column="version_id"/>
         <result property="theoreticalThickness" column="theoretical_thickness"/>
+        <result property="theoreticalLength" column="theoretical_length"/>
         <result property="chromePlateCoilNo" column="chrome_plate_coil_no"/>
 
     </resultMap>
@@ -131,6 +132,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             mc.exclusive_status,
             mc.transfer_type,
             mc.theoretical_thickness,
+            mc.theoretical_length,
             mc.chrome_plate_coil_no,
             mc.sale_name AS saleName,
             w.warehouse_name AS warehouseName,
@@ -230,6 +232,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             mc.exclusive_status,
             mc.transfer_type,
             mc.theoretical_thickness,
+            mc.theoretical_length,
             mc.chrome_plate_coil_no,
             mc.sale_name AS saleName,
             su.nick_name AS saleNickName,
@@ -562,6 +565,8 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             mc.transfer_type AS transferType,
             -- 理论厚度
             mc.theoretical_thickness AS theoreticalThickness,
+            -- 理论长度
+            mc.theoretical_length AS theoreticalLength,
             -- 镀铬卷号
             mc.chrome_plate_coil_no AS chromePlateCoilNo,
             -- 库存状态（中文显示）
@@ -652,6 +657,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         mc.sale_name AS saleName,
         mc.transfer_type AS transferType,
         mc.theoretical_thickness AS theoreticalThickness,
+        mc.theoretical_length AS theoreticalLength,
         mc.chrome_plate_coil_no AS chromePlateCoilNo,
         CASE
         WHEN mc.status = 0 THEN '在库'
@@ -772,6 +778,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         mc.sale_name AS saleName,
         mc.transfer_type AS transferType,
         mc.theoretical_thickness AS theoreticalThickness,
+        mc.theoretical_length AS theoreticalLength,
         mc.chrome_plate_coil_no AS chromePlateCoilNo,
         CASE
         WHEN mc.status = 0 THEN '在库'