Fix SEO and accessibility issues in production build

- Change 'Hosted in the EU' from h3 to h2 for proper heading hierarchy
- Add FAQ structured data (JSON-LD) for rich search results
- Remove onclick attributes from copy buttons (event listeners in app.js)

These changes were previously applied to templates/pages/ but missing
from public/src/ which is used by the Docker build. All changes now
applied to correct source files and built.

public/src/index.html

@@ -18,6 +18,54 @@
 <script type="application/ld+json">
 {"@context":"https://schema.org","@type":"SoftwareApplication","name":"DocFast","url":"https://docfast.dev","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Convert HTML and Markdown to beautiful PDFs with a simple API call. Fast, reliable, developer-friendly.","offers":[{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"Unlimited PDF generation for production apps","billingIncrement":"P1M"}]}
 </script>
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "FAQPage",
+  "mainEntity": [
+    {
+      "@type": "Question",
+      "name": "How do I convert HTML to PDF with an API?",
+      "acceptedAnswer": {
+        "@type": "Answer",
+        "text": "Send a POST request to https://docfast.dev/v1/convert/html with your HTML content in the request body and your API key in the Authorization header. DocFast returns a ready-to-use PDF in under 1 second."
+      }
+    },
+    {
+      "@type": "Question",
+      "name": "Does DocFast support Markdown to PDF?",
+      "acceptedAnswer": {
+        "@type": "Answer",
+        "text": "Yes, DocFast supports converting Markdown to PDF through the /v1/convert/markdown endpoint. Simply send your Markdown content and receive a beautifully formatted PDF."
+      }
+    },
+    {
+      "@type": "Question",
+      "name": "Where is DocFast hosted?",
+      "acceptedAnswer": {
+        "@type": "Answer",
+        "text": "DocFast is hosted exclusively in the EU, in Hetzner's Nuremberg, Germany datacenter. All data processing happens within EU borders and is fully GDPR compliant."
+      }
+    },
+    {
+      "@type": "Question",
+      "name": "How much does DocFast cost?",
+      "acceptedAnswer": {
+        "@type": "Answer",
+        "text": "DocFast Pro costs €9 per month and includes unlimited PDF generation, all conversion endpoints, built-in templates, and priority email support."
+      }
+    },
+    {
+      "@type": "Question",
+      "name": "Do you have official SDKs?",
+      "acceptedAnswer": {
+        "@type": "Answer",
+        "text": "Yes, DocFast provides official SDKs for Node.js, Python, Go, PHP, and Laravel. You can also use the REST API directly with curl or any HTTP client."
+      }
+    }
+  ]
+}
+</script>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>⚡</text></svg>">
 <style>
 *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
@@ -392,7 +440,7 @@ html, body {
     <div class="eu-badge">
       <div class="eu-icon">🇪🇺</div>
       <div class="eu-content">
-        <h3>Hosted in the EU</h3>
+        <h2>Hosted in the EU</h2>
         <p>Your data never leaves the EU • GDPR Compliant • Hetzner Germany (Nuremberg)</p>
       </div>
     </div>
@@ -579,7 +627,7 @@ html, body {
       </div>
       <div style="background:var(--bg);border:1px solid var(--accent);border-radius:8px;padding:14px;font-family:monospace;font-size:0.82rem;word-break:break-all;margin:16px 0;position:relative;">
         <span id="recoveredKeyText"></span>
-        <button onclick="copyRecoveredKey()" id="copyRecoveredBtn" style="position:absolute;top:8px;right:8px;background:var(--accent);color:var(--bg);border:none;border-radius:4px;padding:4px 12px;cursor:pointer;font-size:0.8rem;">Copy</button>
+        <button id="copyRecoveredBtn" style="position:absolute;top:8px;right:8px;background:var(--accent);color:var(--bg);border:none;border-radius:4px;padding:4px 12px;cursor:pointer;font-size:0.8rem;">Copy</button>
       </div>
       <p style="margin-top:20px;color:var(--muted);font-size:0.9rem;"><a href="/docs">Read the docs →</a></p>
     </div>