fix(seo): add OG image, docs footer, GitHub link, and sitemap dates

- Add 1200x630 og-image.png with rug rosette branding
- Add og:image and twitter:image to docs.html
- Upgrade docs.html twitter:card from summary to summary_large_image
- Add og:locale to docs.html
- Add footer with nav links to docs.html
- Add GitHub repo link to both page footers
- Update sitemap.xml lastmod to 2026-03-09

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/website/docs.html

@@ -17,11 +17,14 @@
   <meta property="og:description" content="Complete documentation for The Other Dude MikroTik fleet management platform. Installation, API reference, architecture, and security.">
   <meta property="og:url" content="https://theotherdude.net/docs.html">
   <meta property="og:site_name" content="The Other Dude">
+  <meta property="og:image" content="https://theotherdude.net/assets/og-image.png">
+  <meta property="og:locale" content="en_US">
 
   <!-- Twitter Card -->
-  <meta name="twitter:card" content="summary">
+  <meta name="twitter:card" content="summary_large_image">
   <meta name="twitter:title" content="The Other Dude Documentation — MikroTik Fleet Management Guide">
   <meta name="twitter:description" content="Complete documentation for The Other Dude MikroTik fleet management platform. Installation, API reference, architecture, and security.">
+  <meta name="twitter:image" content="https://theotherdude.net/assets/og-image.png">
 
   <link rel="stylesheet" href="style.css" />
   <link rel="preconnect" href="https://fonts.googleapis.com" />
@@ -1408,5 +1411,35 @@ open http://localhost</code></pre>
   <!-- Back to Top -->
   <button class="back-to-top" id="back-to-top" onclick="scrollToTop()">&uarr;</button>
 
+  <footer class="site-footer">
+    <div class="footer-inner container">
+      <div class="footer-brand">
+        <span class="footer-logo">
+          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" width="24" height="24" aria-hidden="true" style="vertical-align: middle; margin-right: 8px;">
+            <rect x="2" y="2" width="60" height="60" rx="8" fill="none" stroke="#8B1A1A" stroke-width="2"/>
+            <rect x="6" y="6" width="52" height="52" rx="5" fill="none" stroke="#F5E6C8" stroke-width="1.5"/>
+            <rect x="8" y="8" width="48" height="48" rx="4" fill="#8B1A1A" opacity="0.15"/>
+            <path d="M32 8 L56 32 L32 56 L8 32 Z" fill="none" stroke="#8B1A1A" stroke-width="2"/>
+            <path d="M32 13 L51 32 L32 51 L13 32 Z" fill="none" stroke="#F5E6C8" stroke-width="1.5"/>
+            <path d="M32 18 L46 32 L32 46 L18 32 Z" fill="#8B1A1A"/>
+            <path d="M32 19 L38 32 L32 45 L26 32 Z" fill="#2A9D8F"/>
+            <path d="M19 32 L32 26 L45 32 L32 38 Z" fill="#F5E6C8"/>
+            <circle cx="32" cy="32" r="5" fill="#8B1A1A"/>
+            <circle cx="32" cy="32" r="2.5" fill="#2A9D8F"/>
+          </svg>
+          The Other Dude
+        </span>
+        <span class="footer-copy">&copy; 2026 The Other Dude. All rights reserved.</span>
+      </div>
+      <nav class="footer-links">
+        <a href="index.html">Home</a>
+        <a href="#quickstart">Quick Start</a>
+        <a href="#security">Security</a>
+        <a href="#api">API Reference</a>
+        <a href="https://github.com/staack/the-other-dude" rel="noopener">GitHub</a>
+      </nav>
+    </div>
+  </footer>
+
 </body>
 </html>

docs/website/index.html

@@ -480,6 +480,7 @@
         <a href="#architecture">Architecture</a>
         <a href="docs.html#security">Security</a>
         <a href="docs.html#api">API Reference</a>
+        <a href="https://github.com/staack/the-other-dude" rel="noopener">GitHub</a>
       </nav>
     </div>
   </footer>

docs/website/sitemap.xml

@@ -2,13 +2,13 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://theotherdude.net/</loc>
-    <lastmod>2026-03-07</lastmod>
+    <lastmod>2026-03-09</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
   <url>
     <loc>https://theotherdude.net/docs.html</loc>
-    <lastmod>2026-03-07</lastmod>
+    <lastmod>2026-03-09</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
   </url>