test: 테스트 코드 업데이트

- 변경된 API에 맞게 테스트 수정

test/core/engine/progress_loop_test.dart

@@ -13,14 +13,18 @@ class _FakeSaveManager implements SaveManager {
   final List<GameState> savedStates = [];
 
   @override
-  Future<SaveOutcome> saveState(GameState state, {String? fileName}) async {
+  Future<SaveOutcome> saveState(
+    GameState state, {
+    String? fileName,
+    bool cheatsEnabled = false,
+  }) async {
     savedStates.add(state);
     return const SaveOutcome.success();
   }
 
   @override
-  Future<(SaveOutcome, GameState?)> loadState({String? fileName}) async {
-    return (const SaveOutcome.success(), null);
+  Future<(SaveOutcome, GameState?, bool)> loadState({String? fileName}) async {
+    return (const SaveOutcome.success(), null, false);
   }
 
   @override