OIDC 인증 라우트 및 로그인/콜백 페이지 구현

devfront/src/features/auth/LoginPage.tsx

@@ -0,0 +1,23 @@
+import { useAuth } from "react-oidc-context";
+
+export default function LoginPage() {
+  const auth = useAuth();
+
+  const handleLogin = () => {
+    auth.signinRedirect();
+  };
+
+  return (
+    <div className="flex h-screen w-full items-center justify-center bg-gray-100">
+      <div className="w-full max-w-sm rounded-lg border bg-white p-8 shadow-sm">
+        <h1 className="mb-6 text-center text-2xl font-bold text-gray-900">DevFront Login</h1>
+        <button
+          onClick={handleLogin}
+          className="w-full rounded bg-blue-600 px-4 py-2 font-bold text-white hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-opacity-50"
+        >
+          Sign in with Baron SSO
+        </button>
+      </div>
+    </div>
+  );
+}