refactor: enhance GameStateStore integration and improve skill management

scripts/UI/GameOverScreen.cs

@@ -11,29 +11,26 @@ public partial class GameOverScreen : Control
     [Export] public Button MainMenuButton { get; set; }
     [Export] public PackedScene MainMenuScene { get; set; }
 
-    private GameManager _gameManager;
-
     public override void _Ready()
     {
-        _gameManager = GameManager.Instance;
         RestartButton.Pressed += OnRestartClicked;
         MainMenuButton.Pressed += OnMainMenuClicked;
     }
 
     private void OnMainMenuClicked()
     {
-        _gameManager.ResetPlayerState();
+        GameStateStore.Instance?.ResetAll();
         GetTree().ChangeSceneToPacked(MainMenuScene);
     }
 
     private void OnRestartClicked()
     {
-        _gameManager.RestartGame();
+        GameManager.Instance?.RestartGame();
     }
 
     public void OnPlayerDeath()
     {
-        if (_gameManager == null || _gameManager.GetLives() != 0) return;
+        if (GameStateStore.Instance?.Player.Lives != 0) return;
 
         GameOverPanel.Show();
     }

scripts/UI/Hud.cs

@@ -12,12 +12,7 @@ public partial class Hud : Control
     [Export] public ProgressBar HealthBar { get; set; }
     [Export] public Label LivesLabel { get; set; }
 
-    private GameManager _gameManager;
-
-    public override void _Ready()
-    {
-        _gameManager = GameManager.Instance;
-    }
+    private GameStateStore Store => GameStateStore.Instance;
 
     public override void _Process(double delta)
     {
@@ -28,12 +23,12 @@ public partial class Hud : Control
 
     private void SetCoinsLabel()
     {
-        CoinsLabel.Text = Tr("COINS_LABEL") + ": " + _gameManager.GetCoins();
+        CoinsLabel.Text = Tr("COINS_LABEL") + ": " + (Store?.GetTotalCoins() ?? 0);
     }
 
     private void SetLivesLabel()
     {
-        LivesLabel.Text = Tr("LIVES_LABEL") + ": " + _gameManager.GetLives();
+        LivesLabel.Text = Tr("LIVES_LABEL") + ": " + (Store?.Player.Lives ?? 0);
     }
 
     private void SetHealthBar()

scripts/UI/Marketplace.cs

@@ -18,7 +18,7 @@ public partial class Marketplace : Control
     [Export] public PackedScene MarketplaceButtonScene { get; set; }
     [Export] public PackedScene SkillButtonScene { get; set; }
 
-    private GameManager GameManager => GameManager.Instance;
+    private GameStateStore Store => GameStateStore.Instance;
     private SkillManager SkillManager => SkillManager.Instance;
     private readonly List<Button> _unlockButtons = [];
     private readonly List<SkillButton> _skillButtons = [];
@@ -33,7 +33,7 @@ public partial class Marketplace : Control
 
         foreach (var skill in skillsToUnlock) CreateUpgradeButton(skill);
 
-        var unlockedSkills = GameManager.GetUnlockedSkills();
+        var unlockedSkills = Store.GetAllUnlockedSkills();
         foreach (var skill in unlockedSkills) CreateSkillButton(skill);
 
         SkillUnlockerComponent.SkillUnlocked += OnSkillUnlocked;
@@ -113,7 +113,7 @@ public partial class Marketplace : Control
 
     private void OnUpgradeButtonPressed(SkillData skill)
     {
-        if (GameManager.IsSkillUnlocked(skill))
+        if (Store.IsSkillUnlocked(skill))
         {
             if (skill.Level < skill.MaxLevel)
             {

scripts/UI/MarketplaceButton.cs

@@ -13,14 +13,12 @@ public partial class MarketplaceButton : Button
     [Export] public Texture2D LockedSkillIcon { get; set; }
     [Export] public Container SkillLevelContainer { get; set; }
 
-    private GameManager _gameManager;
     private SkillUnlockerComponent _skillUnlockerComponent;
     private SkillManager _skillManager;
 
     public override void _Ready()
     {
-        _gameManager = GameManager.Instance;
-        var player = _gameManager.Player;
+        var player = GameManager.Instance?.Player;
         if (player == null) return;
 
         _skillUnlockerComponent = player.GetNodeOrNull<SkillUnlockerComponent>("SkillUnlockerComponent");
@@ -59,7 +57,7 @@ public partial class MarketplaceButton : Button
             return;
         }
 
-        var isUnlocked = _gameManager.IsSkillUnlocked(Data);
+        var isUnlocked = GameStateStore.Instance?.IsSkillUnlocked(Data) ?? false;
 
         for (var i = 0; i < SkillLevelContainer.GetChildCount(); i++)
         {

scripts/UI/PauseMenu.cs

@@ -53,7 +53,7 @@ public partial class PauseMenu : Control
     private void OnMainMenuPressed()
     {
         GameManager.ResumeGame();
-        GameManager.ResetCurrentSessionState();
+        GameStateStore.Instance?.ResetSession();
         GetTree().ChangeSceneToPacked(MainMenuScene);
     }