docs: explain configuration inputs and authentication components

app/components/CaptchaField.vue

@@ -1,4 +1,8 @@
 <script>
+/**
+ * 人机验证展示适配层：按 provider 呈现图形验证码或极验，输入通过 v-model 回传。
+ * refresh/verified/invalid 交由父级挑战状态处理，组件本身不判断业务接口是否允许操作。
+ */
 import "~/assets/styles/GeetestField.DiieTibK.css";
 import "~/assets/styles/CaptchaField.BSN3ZbsD.css";
 import { toDisplayString } from "vue";