Fix: Ensure video overlay hides correctly when session starts

frontend/script.js

@@ -215,7 +215,7 @@ document.addEventListener('DOMContentLoaded', () => {
                 video.srcObject = null;
                 if (meetingVideo) meetingVideo.srcObject = null;
             }
-            videoOverlay.style.display = 'block';
+            videoOverlay.classList.remove('hidden');
             
             meetingSetup?.classList.remove('hidden');
             meetingActiveVideo?.classList.add('hidden');

frontend/style.css

@@ -352,7 +352,7 @@ body {
     position: absolute;
     inset: 0;
     z-index: 20;
-    display: flex !important;
+    display: flex;
     flex-direction: column;
     align-items: center;
     justify-content: center;