fix(tutorial): preserve click targets across UI transitions

Runtime/UI/ShrinkTutorialDialog.cs

@@ -7,12 +7,30 @@ namespace ShrinkTutorial
 {
     public class ShrinkTutorialDialog : MonoBehaviour
     {
-        private RectTransform _rectTransform;
-        private RectTransform _arrowRectTransform;
-        private TextMeshProUGUI _contentText;
-        private GameObject _skipButtonObject;
+        [Header("Explicit scene bindings")]
+        [SerializeField] private RectTransform _rectTransform;
+        [SerializeField] private RectTransform _arrowRectTransform;
+        [SerializeField] private TextMeshProUGUI _contentText;
+        [SerializeField] private GameObject _skipButtonObject;
         private Action _skipAction;
 
+        /// <summary>
+        /// Uses UI objects that already exist in the scene. This path intentionally does not
+        /// create children or add listeners at runtime; scene-authored persistent callbacks
+        /// remain the source of truth.
+        /// </summary>
+        public bool BindExisting()
+        {
+            if (!_rectTransform)
+                _rectTransform = GetComponent<RectTransform>();
+
+            if (_rectTransform && _arrowRectTransform && _contentText)
+                return true;
+
+            Debug.LogError("[ShrinkTutorial] Explicit dialog bindings are incomplete.", this);
+            return false;
+        }
+
         public void Initialize(Transform parent, Action skipAction)
         {
             _skipAction = skipAction;