refactor(websocket): 重构 WebSocket 相关代码

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2025-08-14 b224c081c0e21dad51f0f628d5c1fbfd4245cddd

 src/main/java/cc/mrbird/febs/mall/dto/AdminHappyActivityCategoryDto.java

@@ -6,4 +6,5 @@
public class AdminHappyActivityCategoryDto {
    private String name;
    private Integer status;
    private Integer hotState;
}