curl --location --request GET '/login/captcha'
{ "code": 10000, "data": { "captchaImage": "data:image/png;base64,iVBORw0KGgoAAAANSU...", "uuid": "a1b2c3d4-e5f6-7890-abcd-ef1234567890" }, "message": "提示消息内容" }