飞书接口在飞书卡片中@用户的方法有个坑

官方文档给出的示例有错误：

card字段应该改为content

另外，飞书消息和飞书卡片中@用户的方式是有区别的：

飞书消息：

<at user_id="xxxx"/>

飞书卡片：

<at id="xxxx"/>

飞书富文本（我没试过）：

{
      "tag": "at",
      "user_id": "xxxx"
}

而在sdk中只找到1中方式：

        // com.lark.oapi.service.im.v1.model.ext.MessageText.java
        public Builder atUser(String userId, String name) {
            sb.append("<at user_id=\\\"")
                    .append(userId)
                    .append("\\\">")
                    .append(name)
                    .append("</at>");
            return this;
        }

希望可以增加对其他方式的支持，或者能说明清楚~ 我尝试了好久一直在使用错误的字段=。=

Start with com.lark.oapi.service.im.v1.model.ext.MessageText.java and inspect the existing atUser method. Compare its user_id output with the issue's message, card, and rich-text examples, and check the official card example referenced in the report. Done means the supported @ formats or their limitations are clearly addressed without retaining the incorrect card-field guidance.