Just like in GUI, in a TUI you need some mechanism to make the rendering output (the characters) match the internal state of the application.
E.g., the user hit ESC -> internal state is CANCELED/WAIT FOR USER -> internal GUI representation now includes a prompt that asks the user to tell Claude what to do differently -> rendering output actually shows said prompt.
E.g., the user hit ESC -> internal state is CANCELED/WAIT FOR USER -> internal GUI representation now includes a prompt that asks the user to tell Claude what to do differently -> rendering output actually shows said prompt.