[重构] 前端改造v2

atsf_server/web/app/(public)/oauth/github/page.tsx

@@ -1,10 +1,12 @@
-import { PublicRoutePlaceholder } from '@/features/auth/components/public-route-placeholder';
+import { Suspense } from 'react';
+
+import { LoadingState } from '@/components/feedback/loading-state';
+import { GitHubOAuthCallback } from '@/features/auth/components/github-oauth-callback';
 
 export default function GithubOAuthPage() {
   return (
-    <PublicRoutePlaceholder
-      title='GitHub OAuth 回调占位'
-      description='阶段 2 将在此接入授权回调处理、状态提示与跳转逻辑。'
-    />
+    <Suspense fallback={<LoadingState />}>
+      <GitHubOAuthCallback />
+    </Suspense>
   );
 }