Method addTaskNote

src/prompt/WorkflowManager.ts:445–453

* 添加任务备注

(id: string, note: string)

   * 添加任务备注
   */
  public addTaskNote(id: string, note: string): WorkflowTask {
    const task = this.getTask(id);
    if (!task) {
      throw new Error(`任务不存在: ${id}`);
    }

    const updatedNotes = [...task.notes, `[${new Date().toISOString()}] ${note}`];
    return this.updateTask(id, { notes: updatedNotes });
  }

  /**
   * 保存todo.md文件