OIDC 인증 라우트 및 로그인/콜백 페이지 구현

devfront/src/features/auth/AuthCallbackPage.tsx

@@ -0,0 +1,19 @@
+import { useEffect } from "react";
+import { useAuth } from "react-oidc-context";
+import { useNavigate } from "react-router-dom";
+
+export default function AuthCallbackPage() {
+  const auth = useAuth();
+  const navigate = useNavigate();
+
+  useEffect(() => {
+    if (auth.isAuthenticated) {
+      navigate("/", { replace: true });
+    } else if (auth.error) {
+      console.error("Auth Error:", auth.error);
+      navigate("/login", { replace: true });
+    }
+  }, [auth.isAuthenticated, auth.error, navigate]);
+
+  return <div>Loading Auth...</div>;
+}