feat: 체결 완료 시 알림 기능 추가

src/app/root.tsx

@@ -12,6 +12,7 @@ import type { Route } from './+types/root';
 
 import './app.css';
 import { Slide } from 'react-toastify';
+import useTradeNotification from '~/features/trade/hooks/useTradeNotification';
 import StompProvider from './provider/StompProvider';
 import UserIdProvider from './provider/UserInfoProvider';
 
@@ -75,6 +76,11 @@ export function Layout({ children }: { children: React.ReactNode }) {
 	);
 }
 
+function TradeNotificationHandler() {
+	useTradeNotification();
+	return null;
+}
+
 export default function App() {
 	return (
 		<UserIdProvider>

src/features/trade/hooks/useTradeNotification.tsx

@@ -0,0 +1,52 @@
+import { useEffect, useState } from 'react';
+import { toast } from 'react-toastify/unstyled';
+
+import { useStompClient } from '~/app/provider/StompProvider';
+import { api as userApi } from '~/entities/user';
+import type { UserInfoResponse } from '~/entities/user/types/user.type';
+
+type TradeNotification = {
+	ticker: string;
+	price: number;
+	size: number;
+	type: 'ask' | 'bid';
+	tradedTime: string;
+};
+
+export default function useTradeNotification() {
+	const { client, connected } = useStompClient();
+	const [userId, setUserId] = useState<number | null>(null);
+
+	useEffect(() => {
+		const fetchUserInfo = async () => {
+			try {
+				const response = await userApi.getUserInfo();
+				const { data } = await (response.json() as Promise<UserInfoResponse>);
+				setUserId(data.userId);
+			} catch (error) {
+				console.error('Failed to fetch user info:', error);
+				toast.error('사용자 정보를 가져오는데 실패했습니다.');
+			}
+		};
+
+		fetchUserInfo();
+	}, []);
+
+	useEffect(() => {
+		if (!client || !connected || !userId) return;
+
+		const subscription = client.subscribe(
+			`/topic/tradeNotification/${userId}`,
+			(message) => {
+				const parsedData = JSON.parse(message.body) as TradeNotification;
+				const tradeType = parsedData.type === 'ask' ? '매도' : '매수';
+				const toastMessage = `${parsedData.ticker} ${tradeType} 체결 완료 - 가격: ${parsedData.price}, 수량: ${parsedData.size}`;
+				toast.success(toastMessage);
+			},
+		);
+
+		return () => {
+			subscription.unsubscribe();
+		};
+	}, [client, connected, userId]);
+}