A tablet or an unfolded foldable is wide enough for the desktop layout,
so opening an agent autofocused the composer and raised the on-screen
keyboard over the conversation. Autofocus on open now also requires a
fine pointer, the same signal the app already uses for hover.
A mouse-driven window still focuses the composer when an agent opens,
and sending a message still keeps the composer focused.
Co-authored-by: Phieu Dinh <phieu@fiu.one>