codes

  // 获取当前窗口或请求关联的服务实例。
  const service = () => {
    // Keep the synchronization engine out of the startup path. Reading the
    // lightweight timer setting below does not initialize a repository client.
    servicePromise ||= Promise.resolve().then(() => {
      const { SyncManager } = (require('./sync/manager') as typeof import('./sync/manager'));
      return new SyncManager({ userDataPath, safeStorage, fetchImpl });
    });
    return servicePromise;
  };

  // 笔记库全局状态：保存当前修改，供后续读取与恢复。
  async save() {
    // Multiple windows share this store. Serialize snapshots so an older write
    // cannot finish after a newer mutation and roll recent-workspace metadata
    // back on disk.
    this.savePromise = this.savePromise.catch(() => {
    }).then(async () => {
      await fs.mkdir(path.dirname(this.filePath), { recursive: true });
      await atomicWriteJson(this.filePath, this.state);
    });
    return this.savePromise;
  }

  // 保存仅本地使用的配置；整个 localSettings 对象均不进入云同步快照。
  async updateLocalSettings(input: Partial<LocalSettings>) {
    return this.queueSettingsMutation(async () => {
      const state = await this.load();
      if ('hotkeysEnabled' in input && typeof input.hotkeysEnabled !== 'boolean') {
        throw new Error('启用热键必须是布尔值');
      }
      const transaction = this.prepareLocalSettings?.(input);
      const previous = state.localSettings;
      state.localSettings = { ...previous, ...input };
      try {
        await this.save();
        transaction?.commit();
      } catch (error) {
        state.localSettings = previous;
        transaction?.rollback();
        throw error;
      }
      for (const listener of this.localSettingsListeners) {
        try {
          listener({ ...state.localSettings });
        } catch {
          // A closing renderer must not turn a committed save into a failure.
        }
      }
      return state.localSettings;
    });
  }

  // 串行合并设置修改，避免异步保存覆盖较新的设置。
  queueSettingsMutation<T>(mutate: () => Promise<T>): Promise<T> {
    const task = this.settingsPromise.catch(() => {
    }).then(mutate);
    this.settingsPromise = task;
    return task;
  }

  document.documentElement.style.setProperty('--editor-font-size', `${fontSize}px`);

        let hotkeysEnabled = !(await stateStore.publicState()).localSettings.hotkeysEnabled;
        await stateStore.updateLocalSettings({ hotkeysEnabled });