Highlight the agents, automation tab when active on the web app

src/khoj/interface/web/agents.html

@@ -56,6 +56,9 @@
             <a href="/">Back to Chat</a>
         </div>
     </body>
+    <script>
+        document.getElementById("agents-nav").classList.add("khoj-nav-selected");
+    </script>
     <style>
         body {
             background-color: var(--background-color);

src/khoj/interface/web/config_automation.html

@@ -31,6 +31,10 @@
         <a href="/">Back to Chat</a>
     </div>
 </div>
+<script>
+    document.getElementById("automations-nav").classList.add("khoj-nav-selected");
+</script>
+
 <script src="/static/assets/natural-cron.min.js"></script>
 <style>
     td {