[重构] 前端改造v1

atsf_server/web/app/(public)/login/page.tsx

@@ -0,0 +1,10 @@
+import { PublicRoutePlaceholder } from '@/features/auth/components/public-route-placeholder';
+
+export default function LoginPage() {
+  return (
+    <PublicRoutePlaceholder
+      title='登录页占位'
+      description='阶段 2 将在此接入真实登录表单、Session 兼容与登录后跳转。'
+    />
+  );
+}