feat: add architecture diagrams page with archify visualizations

- Create /diagrams page with interactive homelab architecture visualizations
- Add deepDive link to homelab project pointing to diagrams
- Include 4 archify diagrams:
  * Talos cluster topology (control planes, GPU worker, storage)
  * GitOps workflow (ArgoCD + Terraform)
  * LLM inference stack (vLLM, Ollama, TEI routing)
  * API request flow sequence diagram
- Support full-screen viewer and embedded grid layout
- Dark/light theme support with responsive design

app/page.tsx

@@ -29,6 +29,7 @@ export default function Home() {
         : undefined,
     videoUrl: '#',
     articleUrl: index === 4 ? 'https://lnkd.in/p/gm2PZkWw' : '#',
+    deepDive: index === 0 ? { url: '/homelab', label: 'Architecture & Deep Dive' } : undefined,
     ciRepos: index === 0 ? [
       { label: 'portfolio', repo: 'rock/riotpiao.com', forgejoBase: 'https://forgejo.riotpiao.com/rock/riotpiao.com' },
       { label: 'homelab-frontend', repo: 'rock/homelab-frontend', forgejoBase: 'https://forgejo.riotpiao.com/rock/homelab-frontend' },
@@ -136,7 +137,7 @@ export default function Home() {
         <div className="max-w-6xl mx-auto text-center text-sm text-gray-600 dark:text-gray-400">
           <p>{t.footer.copyright}</p>
           <p className="mt-2">
-            <a href="https://github.com/rockliang" target="_blank" rel="noopener noreferrer" className="hover:text-blue-600 dark:hover:text-blue-400">
+            <a href="https://github.com/Riotpiaole" target="_blank" rel="noopener noreferrer" className="hover:text-blue-600 dark:hover:text-blue-400">
               {t.footer.github}
             </a>
             {' • '}