/** Auto-closes selectedCamera when the selected live session disappears from liveSessions. */
export function useAutoCloseLiveSession(selectedCamera, liveSessions) {
  watch(
    [() => selectedCamera.value, () => liveSessions.value],
    ([sel, sessions]) => {
      if (!sel || typeof sel.hasStream === 'undefined') return
      const stillActive = (sessions ?? []).some(s => s.id === sel.id)
      if (!stillActive) selectedCamera.value = null
    },
    { deep: true },
  )
}
