Add utils + refacto

Assets/Unheimlich_POC/Scripts/UI/DialogueScreenUI.cs

@@ -1,11 +1,12 @@
 using UnityEngine;
 using TMPro;
+using Unheimlich.Core;
+using Unheimlich.Utility;
 
 namespace Unheimlich.UI
 {
-    public class DialogueScreenUI : MonoBehaviour
+    public class DialogueScreenUI : Singleton<DialogueScreenUI>
     {
-        public static DialogueScreenUI Instance { get; private set; }
         
         [Header("UI References")]
         [SerializeField] private GameObject _dialoguePanel;
@@ -17,16 +18,8 @@ namespace Unheimlich.UI
         
         private CanvasGroup _canvasGroup;
         
-        private void Awake()
+        protected override void OnAwake()
         {
-            if (Instance != null && Instance != this)
-            {
-                Debug.LogWarning("[DialogueScreenUI] Multiple instances detected! Destroying duplicate.");
-                Destroy(gameObject);
-                return;
-            }
-            
-            Instance = this;
             
             if (_dialoguePanel != null)
             {
@@ -37,12 +30,6 @@ namespace Unheimlich.UI
             }
         }
         
-        private void OnDestroy()
-        {
-            if (Instance == this)
-                Instance = null;
-        }
-        
         public void Show(string speaker, string dialogue)
         {
             if (_speakerText != null)
@@ -73,18 +60,19 @@ namespace Unheimlich.UI
         {
             if (_canvasGroup != null && _dialoguePanel != null)
             {
-                LeanTween.cancel(_dialoguePanel);
-                LeanTween.alphaCanvas(_canvasGroup, 0f, _fadeOutDuration)
-                    .setOnComplete(() =>
-                    {
+                TweenHelper.FadeCanvasGroup(
+                    _canvasGroup, 
+                    0f, 
+                    _fadeOutDuration,
+                    () => {
                         Hide();
-                        onComplete?.Invoke();
+                        onComplete.SafeInvoke();
                     });
             }
             else
             {
                 Hide();
-                onComplete?.Invoke();
+                onComplete.SafeInvoke();
             }
         }
     }