feat：修复下载数据集问题、删除数据确认框、修改标题、添加列表轮询刷新 (#16)

* refactor: clean up tag management and dataset handling, update API endpoints

* feat: add showTime prop to DevelopmentInProgress component across multiple pages

* refactor: update component styles and improve layout with new utility classes

* feat: enhance useFetchData hook with polling functionality and improve task progress tracking

* feat: enhance dataset management features with improved tag handling, download functionality, and UI updates

* feat: Enhance DatasetDetail component with delete functionality and improved download handling

feat: Add automatic data refresh and improved user feedback in DatasetManagementPage

fix: Update dataset API to streamline download functionality and improve error handling

* feat: Clear new tag input after successful addition in TagManager

frontend/src/utils/unit.ts

@@ -64,6 +64,7 @@ export function formatExecutionDuration(
 }
 
 export const formatDuration = (seconds: number): string => {
+  if (seconds < 0) return "--";
   if (seconds < 60) {
     return `${seconds} 秒`;
   } else if (seconds < 3600) {