Add skill upgrade system and refactor skill components for enhanced functionality; update resource paths and configurations

scripts/UI/Marketplace.cs

@@ -35,12 +35,12 @@ public partial class Marketplace : Control
         var unlockedSkills = _gameManager.GetUnlockedSkills();
         foreach (var skill in unlockedSkills) CreateSkillButton(skill);
         
-        SkillUnlockerComponent.SkillUnlocked += OnSkillUnlocker;
+        SkillUnlockerComponent.SkillUnlocked += OnSkillUnlocked;
     }
 
     public override void _ExitTree()
     {
-        SkillUnlockerComponent.SkillUnlocked -= OnSkillUnlocker;
+        SkillUnlockerComponent.SkillUnlocked -= OnSkillUnlocked;
     }
 
     public override void _Input(InputEvent @event)
@@ -59,21 +59,24 @@ public partial class Marketplace : Control
         }
     }
 
-    private string GetButtonText(SkillData skill)
+    private void OnSkillUnlocked(SkillData skill)
     {
-        return $"{Tr(skill.Name)} {skill.Cost}";
-    }
-
-    private void OnSkillUnlocker(SkillData skill)
-    {
-        if (_skillButtons.Count == 0) CreateSkillButton(skill);
+        var buttonExists = false;
+        foreach (var existingButton in _skillButtons)
+        {
+            if (existingButton.Name == skill.Name)
+            {
+                buttonExists = true;
+                break;
+            }
+        }
+        
+        if (!buttonExists) CreateSkillButton(skill);
 
         foreach (var btn in _skillButtons)
         {
-            if (btn.Data.IsActive)
-                btn.Activate();
-            else
-                btn.Deactivate();
+            if (btn.Data.IsActive) btn.Activate();
+            else btn.Deactivate();
         }
     }
 
@@ -93,7 +96,6 @@ public partial class Marketplace : Control
     private void CreateUpgradeButton(SkillData skill)
     {
         var button = MarketplaceButtonScene.Instantiate<MarketplaceButton>();
-        button.Text = GetButtonText(skill);
         button.Data = skill;
         button.Icon = skill.Icon;
         button.Pressed += () => OnUpgradeButtonPressed(skill);
@@ -123,18 +125,6 @@ public partial class Marketplace : Control
         }
     }
 
-    private void RemoveButton(SkillData skill)
-    {
-        foreach (var node in ToUnlockGrid.GetChildren())
-        {
-            var child = (Button)node;
-            if (child.Text != GetButtonText(skill)) continue;
-            
-            child.QueueFree();
-            break;
-        }
-    }
-
     private void OnSkillButtonPressed(SkillButton button)
     {
         SkillUnlockerComponent.SkillManager.ToggleSkillActivation(button.Data);

scripts/UI/MarketplaceButton.cs

@@ -18,45 +18,73 @@ public partial class MarketplaceButton : Button
     public override void _Ready()
     {
         _gameManager = GetNode<GameManager>("/root/GameManager");
-        
-        Setup();
         var player = _gameManager.Player;
-
-        var skillUnlockerComponent = player?.GetNodeOrNull<SkillUnlockerComponent>("SkillUnlockerComponent");
-        if (skillUnlockerComponent == null) return;
+        if (player == null) return;
         
-        skillUnlockerComponent.SkillUnlocked += OnSkillUnlock;
+        _skillUnlockerComponent = player.GetNodeOrNull<SkillUnlockerComponent>("SkillUnlockerComponent");
+        if (_skillUnlockerComponent != null)
+        {
+            _skillUnlockerComponent.SkillUnlocked += OnSkillStateChanged;
+        }
+        
+        UpdateButtonState();
     }
 
     public override void _ExitTree()
     {
-        _skillUnlockerComponent.SkillUnlocked -= OnSkillUnlock;
+        if (_skillUnlockerComponent != null)
+        {
+            _skillUnlockerComponent.SkillUnlocked -= OnSkillStateChanged;
+        }
+    }
+    
+    private void OnSkillStateChanged(SkillData skill)
+    {
+        if (skill.Name == Data.Name)
+        {
+            UpdateButtonState();
+        }
     }
 
-    private void Setup()
+    private void UpdateButtonState()
     {
-        if (Data == null) return;
+        if (Data == null || Data.Upgrades.Count == 0)
+        {
+            Visible = false;
+            return;
+        }
+
+        var isUnlocked = _gameManager.IsSkillUnlocked(Data);
         
+        for (var i = 0; i < SkillLevelContainer.GetChildCount(); i++)
+        {
+            SkillLevelContainer.GetChild(i).QueueFree();
+        }
+
         for (var i = 0; i < Data.MaxLevel; i++)
         {
             var icon = new TextureRect()
             {
-                Texture = i < Data.Level ? UnlockedSkillIcon : LockedSkillIcon,
+                Texture = (isUnlocked && i < Data.Level) ? UnlockedSkillIcon : LockedSkillIcon,
+                ExpandMode = TextureRect.ExpandModeEnum.FitWidthProportional
             };
             SkillLevelContainer.AddChild(icon);
         }
-    }
 
-    private void OnSkillUnlock(SkillData skill)
-    {
-        if (skill.Name != Data.Name) return;
-
-        for (var i = 0; i < Data.MaxLevel; i++)
+        if (!isUnlocked)
         {
-            var icon = SkillLevelContainer.GetChildOrNull<TextureRect>(i);
-            if (icon == null) continue;
-            icon.Texture = i < Data.Level ? UnlockedSkillIcon : LockedSkillIcon;
-            Disabled = i >= Data.Level;
+            Text = $"{Tr(Data.Name)} ({Data.Upgrades[0].Cost})";
+            Disabled = false;
+        }
+        else if (Data.Level < Data.MaxLevel)
+        {
+            Text = $"{Tr(Data.Name)} ({Data.Upgrades[Data.Level].Cost})";
+            Disabled = false;
+        }
+        else
+        {
+            Text = $"{Tr(Data.Name)} (MAX)";
+            Disabled = true;
         }
     }
 }