Refactor app instance to Keycloak SSO

app-instance/frontend/app/logout/callback/page.tsx

@@ -0,0 +1,32 @@
+'use client';
+
+import { useEffect } from 'react';
+import { useRouter } from 'next/navigation';
+
+import { clearTokens } from '@/lib/api';
+import { clearKeycloakLogoutInProgress, clearLoginState } from '@/lib/keycloak-oidc';
+import { pickAppText } from '@/lib/i18n/core';
+import { useAppI18n } from '@/lib/i18n/provider';
+import { useChatStore } from '@/lib/store';
+
+export default function LogoutCallbackPage() {
+  const { locale } = useAppI18n();
+  const router = useRouter();
+  const setUser = useChatStore((s) => s.setUser);
+
+  useEffect(() => {
+    clearTokens();
+    clearLoginState();
+    clearKeycloakLogoutInProgress();
+    setUser(null);
+    router.replace('/login?logged_out=1');
+  }, [router, setUser]);
+
+  return (
+    <div className="flex min-h-screen items-center justify-center px-4">
+      <div className="text-sm text-muted-foreground">
+        {pickAppText(locale, '正在退出登录...', 'Signing out...')}
+      </div>
+    </div>
+  );
+}