refactor(contract): 统一合同编号字段名从contractNo改为contractCode

修改多个组件中合同编号字段名以保持一致性，移除未使用的props和清理冗余代码

klp-ui/src/views/crm/contract/components/ContractList.vue

@@ -74,7 +74,7 @@
           <!-- 合同名称和编号 -->
           <div style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px;">
             <div style="font-weight: bold;">{{ row.contractName }}</div>
-            <div style="font-size: 12px; color: #606266;">{{ row.contractNo }}</div>
+            <div style="font-size: 12px; color: #606266;">{{ row.contractCode }}</div>
           </div>
 
           <!-- 供方和需方 -->
@@ -144,7 +144,7 @@ export default {
         pageNum: 1,
         pageSize: 10,
         contractName: undefined,
-        contractNo: undefined,
+        contractCode: undefined,
         supplier: undefined,
         customer: undefined,
         signTime: undefined,
@@ -230,7 +230,7 @@ export default {
 
       // 合同编号
       worksheet.mergeCells('G2:H2');
-      worksheet.getCell('G2').value = `合同编号：${row.contractNo || ''}`;
+      worksheet.getCell('G2').value = `合同编号：${row.contractCode || ''}`;
       worksheet.getCell('G2').alignment = { horizontal: 'right', vertical: 'middle' };
 
       // 供方信息
@@ -692,7 +692,7 @@ export default {
       // 5. 导出文件
       const buffer = await workbook.xlsx.writeBuffer();
       const blob = new Blob([buffer], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
-      saveAs(blob, `合同_${row.contractNo || row.contractName || '未命名'}.xlsx`);
+      saveAs(blob, `合同_${row.contractCode || row.contractName || '未命名'}.xlsx`);
     },
   }
 };