Improved Meeting Experience & Screen Sharing

The AI Moderator meeting experience has been improved with a more focused layout, clearer participant and meeting states, and better meeting controls overall, making it easier to follow what's happening during a session. An explicit Share Screen feature has also been added, supporting browser tab, application window, and full-screen sharing options.

The experience now clearly indicates when screen sharing is active, and handles situations where sharing is stopped or interrupted more gracefully than before. Together, these changes make it easier to review prototypes, websites, presentations, and other stimuli during an interview, with clearer visibility into what state the meeting and sharing session are actually