Fix Bug: Duel Selection Popup Scroll Jumps to Bottom on Mouse Wheel

In duel option popups like Declare Type, mouse-wheel scrolling jumped near the bottom instead of smooth incremental movement due to an overly high ScrollRect sensitivity (1000) in PopupDuelSelection. Lowering sensitivity fixed wheel scrolling, and additional navigation safeguards were added so keyboard/controller focus stays on list items instead of jumping to the scrollbar.

Assets/Prefabs/UI/PopupDuelSelection.prefab

@@ -384,7 +384,7 @@ MonoBehaviour:
   m_Elasticity: 0.1
   m_Inertia: 1
   m_DecelerationRate: 0.135
-  m_ScrollSensitivity: 1000
+  m_ScrollSensitivity: 10
   m_Viewport: {fileID: 277287946404074816}
   m_HorizontalScrollbar: {fileID: 0}
   m_VerticalScrollbar: {fileID: 277287947542810653}

Assets/Scripts/MDPro3/UI/Popup/Old/PopupDuelSelection.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.EventSystems;
 using UnityEngine.UI;
 
 namespace MDPro3.UI 
@@ -17,13 +18,17 @@ namespace MDPro3.UI
         {
             base.InitializeSelections();
             Program.instance.currentServant.returnAction = null;
+
+            var selectionButtons = new List<Button>();
             for (int i = 1; i < selections.Count; i++)
             {
                 GameObject newSelection = Instantiate(item);
                 newSelection.transform.SetParent(scrollRect.content, false);
                 newSelection.transform.GetChild(0).GetChild(0).GetComponent<Text>().text = selections[i];
-                newSelection.transform.GetChild(0).name = responses[i - 1].ToString();
-                newSelection.transform.GetChild(0).GetComponent<Button>().onClick.AddListener(() =>
+                var buttonTransform = newSelection.transform.GetChild(0);
+                buttonTransform.name = responses[i - 1].ToString();
+                var button = buttonTransform.GetComponent<Button>();
+                button.onClick.AddListener(() =>
                 {
                     string selected = UnityEngine.EventSystems.EventSystem.current.
                         currentSelectedGameObject.name;
@@ -35,14 +40,39 @@ namespace MDPro3.UI
                     }
                     Hide();
                 });
+                selectionButtons.Add(button);
                 newSelection.GetComponent<RectTransform>().anchoredPosition = new Vector2(0, -20 - 90 * (i - 1));
             }
+
+            for (int i = 0; i < selectionButtons.Count; i++)
+            {
+                var button = selectionButtons[i];
+                var navigation = button.navigation;
+                navigation.mode = Navigation.Mode.Explicit;
+                navigation.selectOnUp = selectionButtons[Mathf.Max(0, i - 1)];
+                navigation.selectOnDown = selectionButtons[Mathf.Min(selectionButtons.Count - 1, i + 1)];
+                navigation.selectOnLeft = button;
+                navigation.selectOnRight = button;
+                button.navigation = navigation;
+            }
+
+            if (scrollRect.verticalScrollbar != null)
+            {
+                var scrollbarNavigation = scrollRect.verticalScrollbar.navigation;
+                scrollbarNavigation.mode = Navigation.Mode.None;
+                scrollRect.verticalScrollbar.navigation = scrollbarNavigation;
+            }
+
             scrollRect.content.sizeDelta = new Vector2(scrollRect.content.sizeDelta.x, 25 + (selections.Count - 1) * 90);
             baseRect.sizeDelta = new Vector2(baseRect.sizeDelta.x,
                 scrollRect.content.sizeDelta.y + 50 > 800 ?
                 800 :
                 scrollRect.content.sizeDelta.y + 50
                 );
+
+            scrollRect.verticalNormalizedPosition = 1f;
+            if (selectionButtons.Count > 0)
+                EventSystem.current.SetSelectedGameObject(selectionButtons[0].gameObject);
         }
     }