docs: annotate remaining routes layouts and view boundaries

app/pages/home.htm.vue

@@ -1,4 +1,7 @@
 <script setup>
+/**
+ * 旧平台单点登录入口：路由守卫负责从 URL 提取并清理凭据；本页只发起服务端验证，支持失败后重试并在离页时取消待处理凭据。
+ */
 import { onBeforeUnmount, onMounted, ref } from "vue";
 import { useHead, useRouter } from "#app";
 import { NuxtLink } from "#components";
@@ -18,6 +21,7 @@ const isVerifying = ref(false);
 const verificationError = ref("");
 let disposed = false;
 
+// 通过会话核心验证已提取的旧平台登录，不再次读取 URL 中的敏感参数；只有组件仍存活时才进入首页。
 async function verifyAndEnterConsole() {
   if (isVerifying.value) return;
   isVerifying.value = true;