Composer
Where someone writes to the agent: text, a few selectors, and one Send action.
Composer
One filled action, Send. Enter sends, and Shift+Enter starts a new line.
Why
Ghost selectors in the footer row and exactly ONE solid action, which is why send is the only filled control. Enter sends, Shift+Enter breaks the line, and an IME candidate accepted with Enter does not send. The only place --elevation-floating is used.