fix(html): resolve validation errors, implement dynamic MDX heading shifting, and improve accessibility

scripts/check-html.ts

@@ -5,12 +5,11 @@ import * as path from 'path';
 import { execSync } from 'child_process';
 
 const targetUrl = process.argv[2] || process.env.NEXT_PUBLIC_BASE_URL || 'http://localhost:3000';
-const limit = process.env.PAGESPEED_LIMIT ? parseInt(process.env.PAGESPEED_LIMIT) : 0; // 0 means no limit
 const gatekeeperPassword = process.env.GATEKEEPER_PASSWORD || 'klz2026';
 
 async function main() {
   console.log(`\n🚀 Starting HTML Validation for: ${targetUrl}`);
-  console.log(`📊 Limit: ${limit ? limit : 'None (Full Sitemap)'} pages\n`);
+  console.log(`📊 Limit: None (Full Sitemap)\n`);
 
   try {
     const sitemapUrl = `${targetUrl.replace(/\/$/, '')}/sitemap.xml`;
@@ -39,15 +38,6 @@ async function main() {
       process.exit(1);
     }
 
-    if (limit && urls.length > limit) {
-      console.log(
-        `⚠️  Too many pages (${urls.length}). Limiting to ${limit} representative pages.`,
-      );
-      const home = urls.filter((u) => u.endsWith('/de') || u.endsWith('/en') || u === targetUrl);
-      const others = urls.filter((u) => !home.includes(u));
-      urls = [...home, ...others.slice(0, limit - home.length)];
-    }
-
     const outputDir = path.join(process.cwd(), '.htmlvalidate-tmp');
     if (fs.existsSync(outputDir)) fs.rmSync(outputDir, { recursive: true, force: true });
     fs.mkdirSync(outputDir, { recursive: true });