Added onclick functionality for menu items

app/static/js/fullscreen.js

@@ -42,8 +42,11 @@ function exitFullscreen() {
  * Toggle between enter and exit fullscreen.
  */
 function toggleFullscreen() {
-  if (document.fullscreenElement) exitFullscreen();
-  else                            enterFullscreen();
+  const params = new URLSearchParams(window.location.search);
+  const isFull = params.get('fullscreen') === '1';
+
+  if (isFull) exitFullscreen();
+  else        enterFullscreen();
 }
 
 /**

app/static/js/iframe.js

@@ -139,5 +139,20 @@ window.addEventListener('popstate', function(event) {
     }
 });
 
+/**
+ * Opens the current iframe URL in a new browser tab.
+ */
+function openIframeInNewTab() {
+  const params = new URLSearchParams(window.location.search);
+  const iframeUrl = params.get('iframe');
+  if (iframeUrl) {
+    window.open(iframeUrl, '_blank');
+  } else {
+    alert('No iframe is currently open.');
+  }
+}
+// expose globally so your template’s onclick can find it
+window.openIframeInNewTab = openIframeInNewTab;
+
 // Adjust iframe height on window resize
 window.addEventListener('resize', syncIframeHeight);