♻️(frontend) remove header from video conference

Removed the header when inside a room to maximize space for the camera
gallery. Settings are now accessible via the options menu.

It aligns the design with common video conference tools as meet,
or jitsi. @manuhabitela was aligned with this change.

src/frontend/src/features/rooms/components/Conference.tsx

@@ -111,7 +111,7 @@ export const Conference = ({
 
   return (
     <QueryAware status={isFetchError ? createStatus : fetchStatus}>
-      <Screen>
+      <Screen header={false}>
         <LiveKitRoom
           room={room}
           serverUrl={data?.livekit?.url}