Build a real-time support chat system with a floating widget for users and an admin dashboard for support staff. Use when the user wants live chat, customer support chat, real-time messaging, or in-app support.

构建一个实时支持聊天系统，包含用户端的浮动窗口和客服端的管理面板，适用于需要实时聊天、客户服务聊天、即时消息或应用内支持的场景