refactor: Consolidate skill component logic into SkillComponentBase and update manager access to singletons.

Autoloads/FloatingTextManager.cs

@@ -14,6 +14,18 @@ public partial class FloatingTextManager : Node
     [Export] public Color CoinColor { get; set; } = new Color("#ebd320");   // Gold
     [Export] public Color MessageColor { get; set; } = new Color("#ffffff"); // White
 
+    public static FloatingTextManager Instance { get; private set; }
+
+    public override void _Ready()
+    {
+        Instance = this;
+    }
+
+    public override void _ExitTree()
+    {
+        if (Instance == this) Instance = null;
+    }
+
     public void ShowDamage(float amount, Vector2 position)
     {
         var text = Mathf.Round(amount * 100f).ToString(CultureInfo.InvariantCulture);