Method filterByPriority

src/context/processors/ContextFilter.ts:129–138

* 按优先级过滤消息

(messages: ContextMessage[], minPriority: number)

   * 按优先级过滤消息
   */
  private filterByPriority(messages: ContextMessage[], minPriority: number): ContextMessage[] {
    return messages.filter(msg => {
      // 系统消息始终保留
      if (msg.role === 'system') return true;

      // 计算消息优先级
      const priority = this.calculateMessagePriority(msg);
      return priority >= minPriority;
    });
  }

  /**
   * 计算消息优先级