Closes AI-432
The turn-end action buttons in the agent panel (scroll to top, scroll to
most recent prompt, open as markdown, thumbs up/down, share/sync) are
now exposed as local slash commands in the message editor instead of
buttons rendered at the end of each turn. The actions themselves are
unchanged — this is just a different way to access them.
Release Notes:
- Changed some of the agent panel's turn-end action buttons into slash
commands in the message editor.
---------
Co-authored-by: zed-zippy[bot] <234243425+zed-zippy[bot]@users.noreply.github.com>
