add prefix for playground players

src/main/java/io/ib67/sfcraft/module/room/CreativeRoomModule.java

@@ -13,10 +13,19 @@ import io.ib67.sfcraft.room.create.CreativeSpaceFactory;
 import io.ib67.sfcraft.room.create.CreativeSpaceRoom;
 import io.ib67.sfcraft.util.SFConsts;
 import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
+import net.fabricmc.fabric.api.networking.v1.PacketSender;
+import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
 import net.minecraft.command.CommandRegistryAccess;
+import net.minecraft.network.packet.s2c.play.TeamS2CPacket;
 import net.minecraft.registry.RegistryKey;
+import net.minecraft.scoreboard.Team;
+import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.command.CommandManager;
 import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.server.network.ServerPlayNetworkHandler;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.text.Text;
+import net.minecraft.util.Colors;
 import net.minecraft.world.chunk.ChunkStatus;
 
 public class CreativeRoomModule extends ServerModule {
@@ -29,17 +38,50 @@ public class CreativeRoomModule extends ServerModule {
     @Inject
     private MinecraftServerSupplier serverSupplier;
     private CreativeSpaceRoom room;
+    private Team team;
 
     @Override
     public void onInitialize() {
         CommandRegistrationCallback.EVENT
                 .register(this::registerCommand);
+        ServerPlayConnectionEvents.JOIN.register(this::onJoin);
+        ServerPlayConnectionEvents.DISCONNECT.register(this::onDisconnect);
         room = new CreativeSpaceRoom();
         roomRegistry.registerRoomType(CreativeSpaceRoom.class, CreativeSpaceRoom.WORLD, new CreativeSpaceFactory(room));
         roomRegistry.createRoomOf(CreativeSpaceRoom.class, CreativeSpaceRoom.IDENTIFIER, null, (String) null);
         roomModule.enqueuePregen(CreativeSpaceRoom.WORLD, CreativeSpaceRoom.SPAWN_POS);
     }
 
+    private void onDisconnect(ServerPlayNetworkHandler serverPlayNetworkHandler, MinecraftServer minecraftServer) {
+        ServerPlayerEntity player = serverPlayNetworkHandler.getPlayer();
+        if (!RoomModule.isVirtual(player.getUuid())) {
+            return;
+        }
+        String playerName = player.getName().getLiteralString();
+        team.getPlayerList().remove(playerName);
+        player.server.getPlayerManager().sendToAll(TeamS2CPacket.updateTeam(team, true));
+    }
+
+    private void onJoin(ServerPlayNetworkHandler serverPlayNetworkHandler, PacketSender packetSender, MinecraftServer minecraftServer) {
+        ServerPlayerEntity player = serverPlayNetworkHandler.getPlayer();
+        if (RoomModule.isVirtual(player.getUuid())) {
+            String playerName = player.getName().getLiteralString();
+            team.getPlayerList().add(playerName);
+        }
+        player.server.getPlayerManager().sendToAll(TeamS2CPacket.updateTeam(team, true));
+    }
+
+
+
+    @Override
+    public void onEnable() {
+        if (team == null) {
+            team = new Team(serverSupplier.get().getScoreboard(), "playgrd");
+            team.setPrefix(Text.literal("[游乐场] ").withColor(Colors.LIGHT_YELLOW));
+        }
+    }
+
+
     private void registerCommand(CommandDispatcher<ServerCommandSource> dispatcher,
                                  CommandRegistryAccess registry, CommandManager.RegistrationEnvironment env) {
         dispatcher.register(