Method setPlayButtonDisabled

js/ReadingSystem.js:638–643

* 设置播放按钮禁用状态 * @param {boolean} disabled - 是否禁用

(disabled)

   * @param {boolean} disabled - 是否禁用
   */
  setPlayButtonDisabled(disabled) {
    if (!this.dom.playPauseBtn) return;

    this.dom.playPauseBtn.disabled = disabled;
    this.dom.playPauseBtn.setAttribute('aria-disabled', disabled ? 'true' : 'false');
  }

  /**
   * 切换播放速度