web: link Profullstack, Inc. footer to profullstack.com

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: ralyodio

apps/web/public/index.html

@@ -79,7 +79,7 @@
   <footer>
     <a href="https://github.com/profullstack/tronbrowser.dev">GitHub</a> ·
     <a href="https://github.com/profullstack/tronbrowser.dev/blob/main/docs/tronbrowser-prd.md">PRD</a>
-    <div class="copyright">© 2026 Profullstack, Inc. · MIT License</div>
+    <div class="copyright">© 2026 <a href="https://profullstack.com">Profullstack, Inc.</a> · MIT License</div>
   </footer>
 </div>
 <script>