feat: 完成数码管websocket通信

server/src/Services/HttpHdmiVideoStreamService.cs

@@ -80,7 +80,6 @@ public class HttpHdmiVideoStreamService : BackgroundService
     public override async Task StopAsync(CancellationToken cancellationToken)
     {
         logger.Info("Stopping HDMI Video Stream Service...");
-        _httpListener?.Close();
 
         // 禁用所有活跃的HDMI传输
         var disableTasks = new List<Task>();
@@ -95,7 +94,6 @@ public class HttpHdmiVideoStreamService : BackgroundService
         // 清空字典
         _clientDict.Clear();
 
-        _httpListener?.Close(); // 立即关闭监听器，唤醒阻塞
         await base.StopAsync(cancellationToken);
     }