Add buff management for miracles; implement checks for active buffs and update buff identifiers

Scripts/Core/Effects/ApplyBuffEffect.cs

@@ -6,12 +6,19 @@ namespace ParasiticGod.Scripts.Core.Effects;
 [GlobalClass]
 public partial class ApplyBuffEffect : Effect
 {
+    [Export] public string BuffId { get; set; }
     [Export] public Stat TargetStat { get; set; }
     [Export] public float Multiplier { get; set; } = 2.0f;
     [Export] public double Duration { get; set; } = 30.0;
     
     public override void Execute(GameState gameState)
     {
+        if (gameState.IsBuffActive(BuffId))
+        {
+            GD.Print($"Buff '{BuffId}' is already active. Cannot apply again.");
+            return;
+        }
+        
         var newBuff = new Buff
         {
             Name = $"{TargetStat} x{Multiplier}",
@@ -20,6 +27,7 @@ public partial class ApplyBuffEffect : Effect
         };
         
         gameState.ActiveBuffs.Add(newBuff);
+        gameState.AddActiveBuff(BuffId);
         GameBus.Instance.NotifyBuffAdded(newBuff);
     }