feat(webring): Random link in the Profullstack ring footer (#302)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: ralyodio

src/lib/components/Footer.jsx

@@ -79,6 +79,7 @@ export default function Footer() {
           <a href="https://rssamplifier.com/ring/profullstack/previous?from=https%3A%2F%2Fqrypt.chat%2F" rel="prev">{"<<"}</a>
           <a href="https://rssamplifier.com/ring/profullstack">Profullstack</a>
           <a href="https://rssamplifier.com/ring/profullstack/next?from=https%3A%2F%2Fqrypt.chat%2F" rel="next">{">>"}</a>
+          <a href="https://rssamplifier.com/ring/profullstack/random?from=https%3A%2F%2Fqrypt.chat%2F" title="Random site" aria-label="Random site">{"⚄"}</a>
         </nav>
       </div>