Fix section 404 by rewriting README pages to index.html

Generate VitePress rewrites for subdirectory README.md and simplify Express page resolution.

Co-authored-by: Cursor <cursoragent@cursor.com>

.vitepress/config.mts

@@ -2,6 +2,7 @@ import path from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { defineConfig } from 'vitepress'
 import { missingAssetsPlugin } from './missing-assets-plugin.mjs'
+import { generateRewrites } from './rewrites.mts'
 import { generateSidebar } from './sidebar.mts'
 
 const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..')
@@ -11,6 +12,7 @@ export default defineConfig({
   description: '传统文化典籍资料库',
   lang: 'zh-CN',
   srcDir: '.',
+  rewrites: generateRewrites(),
   srcExclude: [
     '**/node_modules/**',
     '**/.vitepress/**',