Show settings and live preview while recording #132

Currently, when recording is active, the menu bar menu only shows the 'Stop Recording' button. This prevents users from seeing their current settings and also stops the live preview, making it harder to verify what's being captured.

Proposed Change:
Modify MenuBarView.swift to show most of the content previously only visible in the 'idle' state while recording, but with relevant controls disabled.

Specifically, during recording, the menu should include:

• Recording status (Stop button and timer) - replacing the Start button.
• Content selection status (disabled).
• Live preview (active).
• Reset selection (disabled).
• Settings sections (Video, Presenter Overlay, Audio) - showing current configuration, but disabled for modification.
• Bottom actions (Output folder, Settings, Quit).

This change will provide better feedback to the user during the recording session.