Update GaCy-GO

internal/gameserver/world_battle.go

@@ -239,7 +239,11 @@ func (s *Session) cocoonBattleConfig(id, worldLevel, wave uint32) (*common.Battl
 				return nil, fmt.Errorf("player data is not loaded")
 			}
 			config := player.BattleConfig
-			return &config, nil
+			if len(config.Monsters) != 0 {
+				return &config, nil
+			}
+			// An empty custom wave list means the user selected “use Client
+			// stages” in Srtool. Fall through to the installed Calyx stage rows.
 		}
 		stages := row.StageIDs
 		if len(stages) == 0 && row.StageID != 0 {