feat(wms): 新增合同挂接钢卷统计功能

- 在IWmsCoilContractRelService接口中添加queryContractCoilStatistics方法
- 在WmsCoilContractRelController控制器中添加统计查询和导出接口
- 在WmsCoilContractRelMapper中添加selectContractCoilStatistics查询方法
- 实现合同挂接钢卷统计的SQL查询逻辑，支持多条件筛选
- 创建ContractCoilStatisticsBo查询对象和ContractCoilStatisticsVo视图对象
- 开发前端统计页面，包含搜索筛选、统计卡片、图表展示和数据表格
- 集成ECharts实现合同状态分布饼图和销售员挂接钢卷柱状图
- 实现统计数据的Excel导出功能
- 添加响应式设计适配移动端显示

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

@@ -18,7 +18,9 @@ import com.klp.common.core.validate.EditGroup;
 import com.klp.common.enums.BusinessType;
 import com.klp.common.utils.poi.ExcelUtil;
 import com.klp.domain.vo.WmsCoilContractRelVo;
+import com.klp.domain.vo.ContractCoilStatisticsVo;
 import com.klp.domain.bo.WmsCoilContractRelBo;
+import com.klp.domain.bo.ContractCoilStatisticsBo;
 import com.klp.service.IWmsCoilContractRelService;
 import com.klp.common.core.page.TableDataInfo;
 
@@ -97,6 +99,25 @@ public class WmsCoilContractRelController extends BaseController {
         return R.ok(updated);
     }
 
+    /**
+     * 查询合同挂接情况统计
+     */
+    @GetMapping("/statistics")
+    public R<List<ContractCoilStatisticsVo>> statistics(ContractCoilStatisticsBo bo) {
+        List<ContractCoilStatisticsVo> list = iWmsCoilContractRelService.queryContractCoilStatistics(bo);
+        return R.ok(list);
+    }
+
+    /**
+     * 导出合同挂接情况统计
+     */
+    @Log(title = "合同挂接情况统计", businessType = BusinessType.EXPORT)
+    @PostMapping("/statistics/export")
+    public void statisticsExport(ContractCoilStatisticsBo bo, HttpServletResponse response) {
+        List<ContractCoilStatisticsVo> list = iWmsCoilContractRelService.queryContractCoilStatistics(bo);
+        ExcelUtil.exportExcel(list, "合同挂接情况统计", ContractCoilStatisticsVo.class, response);
+    }
+
     /**
      * 删除钢卷与合同关联关系
      *