feat: update vfx

scenes/ui/lobby_main_menu.gd

@@ -72,6 +72,13 @@ func on_create_room_pressed() -> void:
 	lobby._sync_room_profile_card()
 
 func host_room(game_mode: String) -> void:
+	# Guard against double-clicks: the create flow is async, and a second press
+	# before it finishes re-enters create_match() while the bridge is still
+	# JOINING, which throws "Cannot create match when state is JOINING".
+	if lobby._is_hosting:
+		return
+	lobby._is_hosting = true
+
 	if AuthManager.is_guest:
 		if LobbyManager.local_player_name.is_empty() or LobbyManager.local_player_name == "Player":
 			LobbyManager.local_player_name = NameGenerator.generate_guest_name()
@@ -92,6 +99,7 @@ func host_room(game_mode: String) -> void:
 		var ok = await LobbyManager.create_room_lan(room_label)
 		if not ok:
 			lobby.connection_status.text = "Failed to start LAN room. Check port 7777."
+			lobby._is_hosting = false
 	else:
 		lobby.connection_status.text = "Creating Nakama room..."
 		var room_label := "%sRoom %d" % [mode_prefix, randi_range(1000, 9999)]