Method loadSavedSpeed

js/ReadingSystem.js:684–696

* 加载保存的播放速度

()

   * 加载保存的播放速度
   */
  loadSavedSpeed() {
    const savedSpeed = getStorage(this.config.STORAGE_KEYS.PLAYBACK_RATE);
    if (savedSpeed) {
      const parsed = parseFloat(savedSpeed);
      if (Number.isFinite(parsed)) {
        this.state.playbackRate = parsed;
        if (this.dom.audioPlayer) {
          this.dom.audioPlayer.playbackRate = this.state.playbackRate;
        }
        this.updateSpeedButton();
      }
    }
  }

  // =========================================================================
  // 导航控制