feat(battlenode): attack resolves on engine state via view-untangle (M-HC-4a)

Drive ATTACK frames through the headless receive conductor and assert on engine
board state (node-native harness). Two cases: follower -> enemy leader (leader
life drops by atk, attacker spent) and a lethal follower-vs-follower trade (both
removed). ATTACK opcode confirmed = 10 (NetworkBattleDefine.PlayActionType).

Headless view-untangle (no Engine logic edits; drift clean):
- IBattlePlayerView.AttackSelectControl -> non-null HeadlessAttackSelectControl
  (no-op RegisterAttackPair/ResetCardAfterAttack); IsCardTranslatable left to base.
- IBattleCardView.CardInfo -> backing card via BuildInfo (so IsCardTranslatable
  reads authentic IsClass); class/null view ctors now chain : base(buildInfo).
- IBattleCardView._inPlayFrameEffect -> non-null no-op control.
- Seed Certification.viewer_id headless so the IsRecovery target parse
  (vid != UserViewerID) does not throw inside SavedataManager and silently drop
  the parsed targetList.

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

SVSim.BattleEngine/Shim/View/ViewUiTouchStubs.cs

@@ -14,7 +14,19 @@ namespace Wizard.Battle.View
         // Parameterless ctor lets the no-op subclass hand stubs (ClassBattleCardViewBase,
         // NullBattleCardView) and any non-chaining stub satisfy their implicit base() call.
         public BattleCardView() { }
-        public BattleCardView(BuildInfo buildInfo) { }
+        public BattleCardView(BuildInfo buildInfo) { _buildInfo = buildInfo; }
+
+        // HEADLESS-FIX (M-HC-4a): the receive ATTACK path reads BattleCardView.CardInfo (the backing
+        // card) and BattleCardView._inPlayFrameEffect on the resolve path (InPlayCardReflection /
+        // ActionProcessor.Attack). The interface getters in Generated/_IfaceImpl.g.cs surface these two
+        // fields. CardInfo comes from the stored BuildInfo (cardInfo == the card, IReadOnlyBattleCardInfo,
+        // so IsClass etc. are authentic); _inPlayFrameEffect is a non-null no-op frame-effect control
+        // whose HideFrameEffect/UpdateCanAttackEffect are empty (Generated/InPlayCardFrameEffectControl.g.cs).
+        internal BuildInfo _buildInfo;
+        internal IReadOnlyBattleCardInfo HeadlessCardInfo => _buildInfo?.cardInfo;
+        internal InPlayCardFrameEffectControl _headlessInPlayFrameEffect =
+            new InPlayCardFrameEffectControl(null, null, null);
+
         // AttackTargetSelectInfo provided by Generated/BattleCardView_AttackTargetSelectInfo.g.cs
         public virtual UnityEngine.GameObject GameObject { get; protected set; }
         public HandCardFrameEffectControl HandFrameEffect { get; private set; }