refactor(data-management): 优化文本数据集类型判断逻辑

- 添加 TEXT_DATASET_TYPE_PREFIX 常量定义
- 新增 isTextDataset 工具函数用于判断文本数据集类型
- 使用 isTextDataset 函数替换原有的直接比较逻辑
- 提高代码可读性和类型判断的准确性

frontend/src/pages/DataManagement/Detail/useFilesOperation.ts

@@ -25,6 +25,7 @@ import {
 import { useParams } from "react-router";
 
 const OFFICE_FILE_EXTENSIONS = [".doc", ".docx"];
+const TEXT_DATASET_TYPE_PREFIX = DatasetType.TEXT;
 const OFFICE_PREVIEW_POLL_INTERVAL = 2000;
 const OFFICE_PREVIEW_POLL_MAX_TIMES = 60;
 
@@ -86,6 +87,13 @@ export function useFilesOperation(dataset: Dataset) {
     };
   }, [clearOfficePreviewPolling]);
 
+  const isTextDataset = (datasetType?: string) => {
+    if (!datasetType) {
+      return false;
+    }
+    return datasetType.toUpperCase().startsWith(TEXT_DATASET_TYPE_PREFIX);
+  };
+
   const fetchFiles = async (
     prefix?: string,
     current?: number,
@@ -93,7 +101,7 @@ export function useFilesOperation(dataset: Dataset) {
   ) => {
     // 如果明确传了 prefix（包括空字符串），使用传入的值；否则使用当前 pagination.prefix
     const targetPrefix = prefix !== undefined ? prefix : (pagination.prefix || '');
-    const shouldExcludeDerivedFiles = dataset?.datasetType === DatasetType.TEXT;
+    const shouldExcludeDerivedFiles = isTextDataset(dataset?.datasetType);
 
     const params: DatasetFilesQueryParams = {
       page: current !== undefined ? current : pagination.current,