Çözüldü bir oyuncu başka bir oyuncuyu öldürünce sağ üstte resimli mesaj çıkması

import com.comphenix.protocol.PacketType;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.events.PacketContainer;
import com.comphenix.protocol.wrappers.WrappedChatComponent;
import com.comphenix.protocol.wrappers.nbt.NbtCompound;
import com.comphenix.protocol.wrappers.nbt.NbtFactory;
import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

public class PlayerKillEffect extends JavaPlugin implements Listener {

    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
    }

    @EventHandler
    public void onPlayerDeath(PlayerDeathEvent event) {
        Player killed = event.getEntity();
        Player killer = killed.getKiller();
        if (killer != null) {
            sendTemporaryAdvancementEffect(killed, killer);
        }
    }

    private void sendTemporaryAdvancementEffect(Player killed, Player killer) {
        PacketContainer advancementPacket = new PacketContainer(PacketType.Play.Server.ADVANCEMENTS);
        
        // Tek kullanımlık advancement oluştur
        NbtCompound advancement = NbtFactory.ofCompound("minecraft:temp_kill");

        // Title ve Description
        advancement.put("display", NbtFactory.ofCompound("display"));
        advancement.getCompound("display").put("title", WrappedChatComponent.fromText("Ölüm Bildirimi").getHandle());
        advancement.getCompound("display").put("description", WrappedChatComponent.fromText(killed.getName() + " adlı oyuncu " + killer.getName() + " tarafından katledildi").getHandle());

        // Icon (Killer's Skull)
        ItemStack skull = new ItemStack(org.bukkit.Material.PLAYER_HEAD);
        skull = skull.clone();
        org.bukkit.inventory.meta.SkullMeta meta = (org.bukkit.inventory.meta.SkullMeta) skull.getItemMeta();
        meta.setOwningPlayer(killer);
        skull.setItemMeta(meta);
        NbtCompound itemNbt = NbtFactory.fromItemTag(skull);
        advancement.getCompound("display").put("icon", itemNbt);

        // Frame Type (Challenge)
        advancement.getCompound("display").put("frame", NbtFactory.of("challenge", "int"));

        // Flags (Toast göster, gizli değil, özel arka plan)
        advancement.getCompound("display").put("flags", NbtFactory.of(0x01, "int")); // 0x01 for toast
        advancement.getCompound("display").put("background", NbtFactory.ofString("minecraft:textures/block/light_blue_wool")); // Farklı bir arka plan

        // X ve Y Koordinatları
        advancement.getCompound("display").put("x_coord", NbtFactory.of(0.0f, "float"));
        advancement.getCompound("display").put("y_coord", NbtFactory.of(0.0f, "float"));

        // Criteria (Geçici bir tetikleyici)
        NbtCompound criteria = NbtFactory.ofCompound("temp_kill");
        advancement.put("criteria", NbtFactory.ofCompound());
        advancement.getCompound("criteria").put("temp_kill", criteria);
        criteria.put("trigger", NbtFactory.ofString("minecraft:impossible")); // Kalıcı değil, sadece efekt için

        // Tüm oyunculara gönder
        for (Player player : Bukkit.getOnlinePlayers()) {
            advancementPacket.getAdvancementMapModifier().write(0, java.util.Collections.singletonMap("minecraft:temp_kill", advancement));
            try {
                ProtocolLibrary.getProtocolManager().sendServerPacket(player, advancementPacket);
                // Efekt gönderildikten sonra temizle (isteğe bağlı, kısa süreli görünüm)
                Bukkit.getScheduler().runTaskLater(this, () -> {
                    PacketContainer removePacket = new PacketContainer(PacketType.Play.Server.ADVANCEMENTS);
                    removePacket.getStringArrays().write(0, new String[]{"minecraft:temp_kill"});
                    ProtocolLibrary.getProtocolManager().sendServerPacket(player, removePacket);
                }, 20L); // 1 saniye sonra temizle
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}