fix: refactor stuff

src/components/Article.tsx

@@ -1,7 +1,8 @@
 import { Component, createSignal, createEffect, onCleanup, Show, createResource } from 'solid-js';
 import { parseMarkdown } from '../markdown';
-import { fetchData, extractSection } from '../data-loader';
+import { extractSection } from '../data-loader';
 import mermaid from 'mermaid';
+import {getIndexedData} from "../data-loader/file-index";
 
 export interface ArticleProps {
   src: string;
@@ -12,7 +13,7 @@ export interface ArticleProps {
 }
 
 async function fetchArticleContent(params: { src: string; section?: string }): Promise<string> {
-  const text = await fetchData(params.src);
+  const text = await getIndexedData(params.src);
   // 如果指定了 section，提取对应内容
   return params.section ? extractSection(text, params.section) : text;
 }