feat: 新增合同、订单明细导出功能，补充业务员字段展示

1.  新增crm订单主、订单明细的导出接口，支持业务精简字段导出
2.  为订单明细VO新增业务员字段，关联查询订单表填充数据
3.  在订单列表页新增业务员表格列展示
4.  为合同编辑页、订单明细页添加导出按钮并实现导出逻辑
5.  新增导出专用的VO类，处理日期格式化和状态转文本

klp-crm/src/main/java/com/klp/crm/controller/CrmOrderItemController.java

@@ -1,7 +1,11 @@
 package com.klp.crm.controller;
 
+import java.text.SimpleDateFormat;
 import java.util.List;
 import java.util.Arrays;
+import java.util.stream.Collectors;
+
+import cn.hutool.core.bean.BeanUtil;
 
 import lombok.RequiredArgsConstructor;
 import javax.servlet.http.HttpServletResponse;
@@ -18,6 +22,7 @@ import com.klp.common.core.validate.EditGroup;
 import com.klp.common.enums.BusinessType;
 import com.klp.common.utils.poi.ExcelUtil;
 import com.klp.crm.domain.vo.CrmOrderItemVo;
+import com.klp.crm.domain.vo.CrmOrderItemExportVo;
 import com.klp.crm.domain.vo.CrmContractOrderFinanceVo;
 import com.klp.crm.domain.bo.CrmOrderItemBo;
 import com.klp.crm.service.ICrmOrderItemService;
@@ -56,6 +61,30 @@ public class CrmOrderItemController extends BaseController {
         ExcelUtil.exportExcel(list, "正式订单明细", CrmOrderItemVo.class, response);
     }
 
+    /**
+     * 导出正式订单明细列表（业务精简字段，用于订单明细列表页导出）
+     */
+    @Log(title = "正式订单明细", businessType = BusinessType.EXPORT)
+    @PostMapping("/exportDetail")
+    public void exportDetail(@RequestBody CrmOrderItemBo bo, HttpServletResponse response) {
+        List<CrmOrderItemVo> list = iCrmOrderItemService.queryList(bo);
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+        List<CrmOrderItemExportVo> exportList = list.stream().map(vo -> {
+            CrmOrderItemExportVo export = new CrmOrderItemExportVo();
+            BeanUtil.copyProperties(vo, export);
+            // 日期格式化
+            export.setSignTime(vo.getSignTime() != null ? sdf.format(vo.getSignTime()) : null);
+            // 展平 orderInfo 中的 salesman、orderCode、contractName
+            if (vo.getOrderInfo() != null) {
+                export.setSalesman(vo.getOrderInfo().getSalesman());
+                export.setOrderCode(vo.getOrderInfo().getOrderCode());
+                export.setContractName(vo.getOrderInfo().getContractName());
+            }
+            return export;
+        }).collect(Collectors.toList());
+        ExcelUtil.exportExcel(exportList, "订单明细列表", CrmOrderItemExportVo.class, response);
+    }
+
     /**
      * 获取正式订单明细详细信息
      *