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/Generated/DefaultOpeningVfx.g.cs

@@ -3,7 +3,7 @@ namespace Wizard.Battle.View.Vfx
 {
 public partial class DefaultOpeningVfx
 {
-        public DefaultOpeningVfx(BackGroundBase backGround) { }
+        public DefaultOpeningVfx(BackGroundBase backGround) : base(backGround) { }
         public override void RegisterOpeningVfx(ClassBattleCardBase playerClass, ClassBattleCardBase enemyClass) { }
 }
 }