feat(battle-engine): preserve ctor base-initializers + Event/Reward shims (1386->1226)

- Regenerate 31 VFX/View/UI/Touch stubs to keep their decomp ': base(...)' /
  ': this(...)' ctor initializers (m1_stub_gen was dropping them -> CS7036/CS1729
  when the copied base has no parameterless ctor). Whole base-ctor cluster cleared.
- UnityEngine.Event: add rawType/keyCode/modifiers/Use() + EventType enum (NGUI
  UIInput/UIInputOnGUI legacy IMGUI path).
- Reward: copy the real Wizard.Scripts.Network.Data.TaskData.Arena.Reward verbatim
  (was an empty ambiguous-name shim in LooseEnds); deps (UserGoods/JsonData) present.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

SVSim.BattleEngine/Shim/External/LooseEnds.cs

@@ -17,7 +17,6 @@ namespace Wizard.Scripts.Network.Data.TaskData.SpotCardExchange { internal class
 namespace Wizard.DeckSelect.FirstDisplayPageIndexGetter { internal class _ShimAnchor { } }
 namespace Wizary.StorySelectionWorld { internal class _ShimAnchor { } }
 namespace Wizard.Scripts.Network.Data.TableData.Arena.TwoPick { internal class _ShimAnchor { } }
-namespace Wizard.Scripts.Network.Data.TaskData.Arena { public class Reward { } }
 
 // IManager: a Cute manager interface implemented by NetworkManager/ResourcesManager.
 namespace Cute { public interface IManager { } }

SVSim.BattleEngine/Shim/External/ThirdParty.cs

@@ -9,8 +9,24 @@ namespace UnityEngine
 {
     public partial class Font : Object { }
     public enum Space { World, Self }
-    // NGUI's UIInputOnGUI reads Event.current (legacy IMGUI event).
-    public class Event { public static Event current => null; }
+    // NGUI's UIInputOnGUI / UIInput read the legacy IMGUI Event.
+    public enum EventType
+    {
+        MouseDown, MouseUp, MouseMove, MouseDrag, KeyDown, KeyUp,
+        ScrollWheel, Repaint, Layout, DragUpdated, DragPerform, DragExited,
+        Ignore, Used, ValidateCommand, ExecuteCommand, ContextClick,
+        MouseEnterWindow, MouseLeaveWindow, TouchDown, TouchUp, TouchMove,
+        TouchEnter, TouchLeave, TouchStationary
+    }
+    public class Event
+    {
+        public static Event current => null;
+        public EventType type;
+        public EventType rawType => type;
+        public KeyCode keyCode;
+        public EventModifiers modifiers;
+        public void Use() { }
+    }
 }
 
 namespace UnityEngine.Networking