fix: prevent full page reload on Back to Servers link

Author: ddrayko

public/js/app.js

@@ -1648,7 +1648,7 @@ async function renderServerDetail(serverId) {
 
     el.innerHTML = html`
       <div class="page-header">
-        <a href="/servers" onclick="navigateTo('servers')" class="btn btn-ghost btn-sm" style="margin-bottom:16px;display:inline-flex;width:auto">
+        <a href="/servers" onclick="event.preventDefault();navigateTo('servers')" class="btn btn-ghost btn-sm" style="margin-bottom:16px;display:inline-flex;width:auto">
           <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M19 12H5M12 19l-7-7 7-7"/></svg>
           Back to Servers
         </a>