feat(data-management): 添加Office文档预览功能

- 集成LibreOffice转换器实现DOC/DOCX转PDF功能
- 新增DatasetFilePreviewService处理预览文件管理
- 新增DatasetFilePreviewAsyncService异步转换任务
- 在文件删除时同步清理预览文件
- 前端实现Office文档预览状态轮询机制
- 添加预览API接口支持状态查询和转换触发
- 优化文件预览界面显示转换进度和错误信息

frontend/src/pages/DataManagement/dataset.api.ts

@@ -107,17 +107,33 @@ export function deleteDirectoryUsingDelete(
   return del(`/api/data-management/datasets/${id}/files/directories?prefix=${encodeURIComponent(directoryPath)}`);
 }
 
-export function downloadFileByIdUsingGet(
-  id: string | number,
-  fileId: string | number,
-  fileName: string
-) {
-  return download(
-    `/api/data-management/datasets/${id}/files/${fileId}/download`,
-    null,
-    fileName
-  );
-}
+export function downloadFileByIdUsingGet(
+  id: string | number,
+  fileId: string | number,
+  fileName: string
+) {
+  return download(
+    `/api/data-management/datasets/${id}/files/${fileId}/download`,
+    null,
+    fileName
+  );
+}
+
+// 数据集文件预览状态
+export function queryDatasetFilePreviewStatusUsingGet(
+  datasetId: string | number,
+  fileId: string | number
+) {
+  return get(`/api/data-management/datasets/${datasetId}/files/${fileId}/preview/status`);
+}
+
+// 触发数据集文件预览转换
+export function convertDatasetFilePreviewUsingPost(
+  datasetId: string | number,
+  fileId: string | number
+) {
+  return post(`/api/data-management/datasets/${datasetId}/files/${fileId}/preview/convert`, {});
+}
 
 // 删除数据集文件
 export function deleteDatasetFileUsingDelete(