zagent 0.0.237

• Fixed the first-run sign-in chooser on a credential-less terminal
  (found by the new flock pty card class on its first real exercise):
  chooseSignIn() used await rl.question(...) on plain
  node:readline, whose callbackless promise resolves undefined
  instantly (nodejs/node#57035) — the card printed and zagent exited 2
  before anyone could type 1/2/3. The chooser now wraps the callback
  form (ctrl+D still declines), zagent login runs after restoring
  cooked termios, and the pasted API key no longer echoes — including
  a typeahead burst between the two prompts.