1. 新增盒子编码，检查是否有重复的盒子编码。

Xiajijian

2025-12-25 579f3590f60df0e26c3400394222b26d3d7cc87c

 ard-work/src/main/java/com/ard/work/component/websocket/WebSocketSessionManager.java

@@ -28,4 +28,9 @@
    public static int getOnlineUserCount() {
        return ONLINE_USER_SESSIONS.size();
    }

    public static boolean containsUser(Long userId) {
        return ONLINE_USER_SESSIONS.containsKey(userId);
    }

}