Assistant message action row (`MessageActions`) with copy that morphs into a drawn check, regenerate that spins (continuously while its promise runs), exclusive thumbs up/down that pop in filled, a thumbs-down reason popover with toggle chips and comment, share and a more menu; reveals on message hover or focus and stays visible on touch or with `visibility="always"` for the last message — a standalone, richer counterpart to StreamingResponse's built-in actions.
pnpm dlx shadcn@latest add "https://karaui.kamisama-v0.my.id/r/message-actions.json"