feat(widgets): add phase 4 validation and accessibility

assets/admin/src/components/captcha/GeetestConfig.vue

@@ -1,25 +0,0 @@
-<template>
-  <n-form label-placement="left" label-width="130">
-    <n-space vertical style="width:100%">
-      <n-form-item label="Captcha ID">
-        <n-input v-model:value="model.captcha_id" placeholder="极验 GeeTest CaptchaID" autocomplete="off" />
-      </n-form-item>
-      <n-form-item label="Captcha Key">
-        <n-input v-model:value="model.captcha_key" type="password" show-password-on="click" autocomplete="current-password" />
-      </n-form-item>
-      <n-tag v-if="isConfigured" type="success" size="small">✓ 已完整配置</n-tag>
-      <n-tag v-else type="warning" size="small">未完成配置</n-tag>
-    </n-space>
-  </n-form>
-</template>
-
-<script setup>
-import { computed } from 'vue'
-
-const model = defineModel({ type: Object, default: () => ({ product: 'bind' }) })
-
-const isConfigured = computed(() => {
-  const c = model.value
-  return !!(c.captcha_id && c.captcha_key)
-})
-</script>