🐛 fix(datagrid): 修复 DDL 测试图标重复 mock

- 移除 DataGrid DDL 测试中重复的 AimOutlined mock 属性

- 修复 TypeScript TS1117 编译错误

- 验证 DDL 测试与前端构建通过

frontend/src/components/DataGrid.ddl.test.tsx

@@ -141,7 +141,6 @@ vi.mock('@ant-design/icons', () => {
     LinkOutlined: Icon,
     AimOutlined: Icon,
     TableOutlined: Icon,
-    AimOutlined: Icon,
     SortAscendingOutlined: Icon,
     SortDescendingOutlined: Icon,
     DatabaseOutlined: Icon,