Use when building the pre-call screen — device pickers, mic/camera test, permission prompts, blocked-permission help UX. Triggers when wiring `useDevices`, `useAudioInput`, `useVideoInput`, `usePreviewController`, `DevicesSelection`, `JoinMeetingButton`, or any "before-they-join-the-call" flow on Pexip. Also use when designing fallback messaging for users with denied camera/mic permissions, including per-browser instructional videos for Chrome / Firefox / Safari / Edge on desktop and mobile.
