const Storage = {
    getToken() {
        return localStorage.getItem('token');
    },
    setToken(token) {
        localStorage.setItem('token', token);
    },
    clearToken() {
        localStorage.removeItem('token');
    },
    // 消息缓存
    getCachedMessages(sessionId) {
        const data = localStorage.getItem('messages_' + sessionId);
        return data ? JSON.parse(data) : null;
    },
    setCachedMessages(sessionId, messages) {
        localStorage.setItem('messages_' + sessionId, JSON.stringify(messages));
    },
    clearCachedMessages(sessionId) {
        localStorage.removeItem('messages_' + sessionId);
    }
};