fix: Add back spamless debug functionality

Fixes #786

src/main/java/vazkii/psi/common/network/message/MessageSpamlessChat.java

@@ -8,28 +8,34 @@
  */
 package vazkii.psi.common.network.message;
 
+import net.minecraft.client.GuiMessageTag;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.components.ChatComponent;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.network.chat.Component;
+import net.minecraft.network.chat.MessageSignature;
 import net.minecraftforge.network.NetworkEvent;
 
+import java.nio.ByteBuffer;
 import java.util.function.Supplier;
 
 public class MessageSpamlessChat {
 
 	private final Component message;
 	private static final int BASE_MAGIC = 696969;
+	private final MessageSignature signature;
 	private final int magic;
 
 	public MessageSpamlessChat(Component message, int magic) {
 		this.message = message;
 		this.magic = BASE_MAGIC + magic;
+		this.signature = new MessageSignature(ByteBuffer.allocate(4).putInt(this.magic).array());
 	}
 
 	public MessageSpamlessChat(FriendlyByteBuf buf) {
 		this.message = buf.readComponent();
 		this.magic = buf.readInt();
+		this.signature = new MessageSignature(ByteBuffer.allocate(4).putInt(this.magic).array());
 	}
 
 	public void encode(FriendlyByteBuf buf) {
@@ -40,10 +46,8 @@ public void encode(FriendlyByteBuf buf) {
 	public boolean receive(Supplier<NetworkEvent.Context> context) {
 		context.get().enqueueWork(() -> {
 			ChatComponent chatGui = Minecraft.getInstance().gui.getChat();
-			// TODO: Currently unable to do this way, because of limitations of the new chat system
-			// chatGui.deleteMessage(magic);
-			// chatGui.addMessage(message, magic);
-			chatGui.addMessage(message);
+			chatGui.deleteMessage(signature);
+			chatGui.addMessage(message, signature, GuiMessageTag.system());
 		});
 		return true;
 	}