autorouter.css

/*
 * The composer's provider/model picker is owned by bb, so Auto Router restyles
 * it from the outside: the real model name is hidden and the label is redrawn
 * from `--autorouter-picker-label`. Idle that reads "Auto"; while a submission
 * is being routed the page sets the property to the animated selecting text,
 * so the status appears on the control whose value is being decided.
 */
.autorouter-composer
  button[aria-label^="Provider, model and reasoning"]
  > span[title]
  > * {
  display: none;
}

.autorouter-composer
  button[aria-label^="Provider, model and reasoning"]
  > span[title]::before {
  content: var(--autorouter-picker-label, "Auto");
  color: var(--foreground);
  /*
   * The trigger is `w-fit max-w-full`, so the selecting text is far wider than
   * the idle "Auto" and would spill out of a narrow composer. Truncate instead:
   * the label degrades to an ellipsis rather than breaking the toolbar row.
   */
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.autorouter-composer button[aria-label^="Provider, model and reasoning"] > svg {
  display: none;
}