Function handle_pty_shell_resize 

pub(super) async fn handle_pty_shell_resize(
    __arg0: State<AppState>,
    __arg1: Json<PtyShellResizeRequest>,
) -> impl IntoResponse

POST /api/v1/ptyshell/resize — resize the PTY. Some TUIs render differently or wrap badly at the fallback geometry (25x200).