Function addTextMessage

ui/src/stores/chat.ts:90–101

(role: "user" | "assistant" | "system", text: string)

   * 添加文本消息（简便方法）
   */
  const addTextMessage = (role: "user" | "assistant" | "system", text: string): TextMessage => {
    const message: TextMessage = {
      id: generateId("msg"),
      type: "text",
      role,
      content: { text },
      createdAt: Date.now(),
      status: role === "user" ? "sent" : undefined,
    };
    addMessage(message);
    return message;
  };

  /**
   * 创建用户消息