feat: 修复跨服传送时的错误

hamster-ball-server/src/main/java/cn/hamster3/mc/plugin/ball/server/connector/BallServerChannelInitializer.java

@@ -58,7 +58,7 @@ public class BallServerChannelInitializer extends ChannelInitializer<SocketChann
         }
 
         channel.pipeline()
-                .addLast(new IdleStateHandler(10, 0, 0, TimeUnit.SECONDS))
+                .addLast(new IdleStateHandler(60, 0, 0, TimeUnit.SECONDS))
                 .addLast(new BallServerKeepAliveHandler())
                 .addLast(new LengthFieldPrepender(8))
                 .addLast(new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, 8, 0, 8))

hamster-ball-server/src/main/java/cn/hamster3/mc/plugin/ball/server/connector/BallServerKeepAliveHandler.java

@@ -13,10 +13,10 @@ public class BallServerKeepAliveHandler extends SimpleUserEventChannelHandler<Id
 
     @Override
     protected void eventReceived(ChannelHandlerContext context, IdleStateEvent event) {
-        context.close();
         synchronized (BallServerChannelInitializer.CHANNELS) {
             BallServerChannelInitializer.CHANNELS.remove(context.channel());
         }
+        context.close();
         LOGGER.warn("由于无法验证连接存活，与服务器 {} 的连接已断开.", context.channel().remoteAddress());
     }
 }