fix: apply QA fixes to correct build source (public/src/)

- BUG-055: Remove duplicate preconnect tags from homepage
- BUG-058: Add twitter:image meta tag to homepage
- BUG-060: Add og:title/description/url to sub-pages (impressum/privacy/terms/status)
- BUG-061: Already done in sitemap.xml
- BUG-067: Add skip-to-content link via nav partial + styles_base
- BUG-069: Footer already added to docs.html
- BUG-053: Minify app.js and status.js, update HTML refs

public/src/status.html

@@ -5,6 +5,9 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>System Status — DocFast</title>
 <meta name="description" content="Real-time system status for the DocFast PDF API.">
+<meta property="og:title" content="System Status — DocFast">
+<meta property="og:description" content="Real-time system status for the DocFast PDF API.">
+<meta property="og:url" content="https://docfast.dev/status">
 <link rel="canonical" href="https://docfast.dev/status">
 <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>">
 <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap" rel="stylesheet">
@@ -35,7 +38,7 @@
 
 {{> nav}}
 
-<main>
+<main id="main">
   <div class="container">
     <div id="status-content" class="status-loading">Loading system status…</div>
   </div>
@@ -43,6 +46,6 @@
 
 {{> footer}}
 
-<script src="/status.js"></script>
+<script src="/status.min.js"></script>
 </body>
 </html>