fix: add page title to markdown serving

worker/handler.js

@@ -54,8 +54,16 @@ function matchesRoute(pathname, prefix) {
  * @returns {string}
  */
 function cleanMarkdown(text) {
-  // Strip frontmatter
+  // Extract title from frontmatter, then strip it
+  const fmMatch = text.match(/^---\n([\s\S]*?)\n---/);
+  let title = '';
+  if (fmMatch) {
+    const titleMatch = fmMatch[1].match(/^title:\s*(.+)$/m);
+    if (titleMatch) title = titleMatch[1].trim().replace(/^["']|["']$/g, '');
+  }
   text = text.replace(/^---\n[\s\S]*?\n---\n*/, '');
+  // Add title as H1 if present
+  if (title) text = `# ${title}\n\n${text}`;
   // Strip import statements
   text = text.replace(/^import\s+.*;\s*\n/gm, '');
   // Convert <TabItem> to ### headings, strip <Tabs> wrappers

worker/handler.test.js

@@ -41,8 +41,13 @@ describe('matchesRoute', () => {
 // --- cleanMarkdown ---
 
 describe('cleanMarkdown', () => {
-  it('strips frontmatter', () => {
+  it('extracts title from frontmatter as H1', () => {
     const input = '---\ntitle: Test\nsidebar_position: 1\n---\n\n# Hello\n';
+    expect(cleanMarkdown(input)).toBe('# Test\n\n# Hello\n');
+  });
+
+  it('strips frontmatter without title', () => {
+    const input = '---\nsidebar_position: 1\n---\n\n# Hello\n';
     expect(cleanMarkdown(input)).toBe('# Hello\n');
   });
 
@@ -144,9 +149,10 @@ describe('handleRequest', () => {
       const res = await handleRequest(req);
       expect(res.headers.get('content-type')).toBe('text/markdown; charset=utf-8');
       const text = await res.text();
-      expect(text).not.toContain('---');
+      expect(text).not.toContain('sidebar_position');
       expect(text).not.toContain('import ');
       expect(text).toContain('### JavaScript');
+      expect(text).toContain('# Test');
       expect(text).toContain('# Hello');
     });