refactor(DataManagement): 简化文件操作逻辑并移除文本数据集类型检查

- 移除了未使用的 DatasetType 导入
- 删除了 TEXT_DATASET_TYPE_PREFIX 常量定义
- 移除了 isTextDataset 工具函数
- 直接设置 excludeDerivedFiles 参数为 true，简化查询逻辑

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

@@ -2,7 +2,6 @@ import type {
   Dataset,
   DatasetFile,
 } from "@/pages/DataManagement/dataset.model";
-import { DatasetType } from "@/pages/DataManagement/dataset.model";
 import { App } from "antd";
 import { useCallback, useEffect, useRef, useState } from "react";
 import {
@@ -25,7 +24,6 @@ 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;
 
@@ -87,13 +85,6 @@ 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,
@@ -101,14 +92,13 @@ 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 = isTextDataset(dataset?.datasetType);
 
     const params: DatasetFilesQueryParams = {
       page: current !== undefined ? current : pagination.current,
       size: pageSize !== undefined ? pageSize : pagination.pageSize,
       isWithDirectory: true,
       prefix: targetPrefix,
-      ...(shouldExcludeDerivedFiles ? { excludeDerivedFiles: true } : {}),
+      excludeDerivedFiles: true,
     };
 
     const { data } = await queryDatasetFilesUsingGet(id!, params);