modified: app.py

new file:   static/js/fullscreen.js
new file:   static/js/idle.js
modified:   templates/about.html
modified:   templates/inactive.html
modified:   templates/profiles.html
modified:   templates/quiz.html
modified:   templates/result.html
new file:   templates/video.html

static/js/idle.js

@@ -0,0 +1,16 @@
+(function () {
+  const TIMEOUT_MS = 5 * 60 * 1000;
+  let timer;
+
+  function reset() {
+    clearTimeout(timer);
+    timer = setTimeout(() => {
+      window.location.href = '/video';
+    }, TIMEOUT_MS);
+  }
+
+  ['mousemove', 'mousedown', 'keydown', 'touchstart', 'scroll', 'pointerdown']
+    .forEach(evt => document.addEventListener(evt, reset, { passive: true }));
+
+  reset(); // start the clock on page load
+})();