fix: LauncherHelper 缺 Instances 导入

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

HMCL/src/main/java/org/jackhuang/hmcl/game/LauncherHelper.java

@@ -22,6 +22,7 @@ import org.jackhuang.hmcl.setting.JavaVersionType;
 import org.jackhuang.hmcl.setting.LauncherVisibility;
 import org.jackhuang.hmcl.task.*;
 import org.jackhuang.hmcl.ui.*;
+import org.jackhuang.hmcl.ui.instances.Instances;
 import org.jackhuang.hmcl.ui.construct.DialogCloseEvent;
 import org.jackhuang.hmcl.ui.construct.MessageDialogPane.MessageType;
 import org.jackhuang.hmcl.ui.construct.MessageDialogPane;