Potential fix for code scanning alert no. 2: DOM text reinterpreted as HTML

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

website/app.js

@@ -555,7 +555,7 @@ document.addEventListener('DOMContentLoaded', () => {
             const user = this.getAttribute('data-user');
             const domain = this.getAttribute('data-domain');
             if (user && domain) {
-                this.innerHTML = `${user}@${domain}`;
+                this.textContent = `${user}@${domain}`;
             }
         });
     });