feat(battle-engine): full Unity/VFX/god-object shims + expanded copy closure (2570 files)

Authored Unity primitive/object-model shim, VFX layer (control-flow-preserving, InstantVfx never invokes its action -- headless suppression), god-object stubs (GameMgr/EffectMgr/UIManager with faithfully-extracted nested enums), View/UI/Touch tree, LitJson+BetterList+Tuple copied, third-party stubs. Discovered Roslyn header-error masking: fixing class-header type errors unmasks body references, so the true copy closure is ~2570 files (was 782 under masking). Errors: masked-25720 -> 268; our shim files compile clean. Remaining: ~50 residual shim/external types, 24 NGUI UI-base overrides, static-type fixes, plus likely 1-2 more unmask waves.

SVSim.BattleEngine/Shim/GodObjects/GodObjects.cs

@@ -0,0 +1,61 @@
+// AUTHORED SHIM (not copied). The god-object singletons the engine reaches for
+// presentation/scene/effects. These are the M0 "stop the bleed" types: copying
+// them would re-explode the closure into the whole app (audio, scene, UI, net),
+// so we shim a minimal surface. The nested enums below are presentation
+// classifiers used only inside never-run VFX actions (IsForecast suppresses VFX),
+// so their VALUES are immaterial to game state -- but the symbols the engine
+// references must exist to compile. Members listed are exactly those the compiler
+// demanded (extracted from the copied engine, not guessed).
+// (Global namespace: the decomp root files declare no namespace.)
+
+public class EffectMgr
+{
+    public enum EffectType
+    {
+        NONE,
+        CMN_CARD_ACCELERATE_1, CMN_CARD_CRYSTALLIZE_1, CMN_CARD_SELECT_3,
+        CMN_CARD_SET_1, CMN_CARD_SET_2, CMN_CARD_SET_3,
+        CMN_CARD_TARGET_1, CMN_CARD_TARGET_2,
+        CMN_CRAFT_CARD_1, CMN_CRAFT_CARD_2, CMN_CRAFT_ICON_1,
+        CMN_CRAFT_SPLASH_1, CMN_CRAFT_SPLASH_2, CMN_CRAFT_SPLASH_3, CMN_CRAFT_SPLASH_4,
+        CMN_CRAFT_TRACK_1, CMN_FRAME_BTN_1, CMN_FRAME_BTN_2,
+        CMN_GACHA_CURSOR_1, CMN_GACHA_OPEN_2, CMN_GACHA_OPEN_3, CMN_GACHA_OPEN_4,
+        CMN_INPUT_DRAG_1, CMN_INPUT_TOUCH_1, CMN_INPUT_TOUCH_2,
+        CMN_RESULT_BACK_1, CMN_RESULT_BACK_2, CMN_RESULT_BACK_3,
+        CMN_RESULT_FAILED_1, CMN_RESULT_GAUGE_1, CMN_RESULT_GAUGE_2,
+        CMN_RESULT_LVUP_1, CMN_RESULT_MATCH_1, CMN_RESULT_ORB_1, CMN_RESULT_ORB_2,
+        CMN_RESULT_RANKDOWN_1, CMN_RESULT_RANKUP_1, CMN_RESULT_TIERUP_1,
+        CMN_START_CARD_1, CMN_START_VS_1, CMN_START_VS_ST2,
+        CMN_UI_TURN_1, CMN_UI_TURN_5, CMN_UI_TURN_6,
+    }
+    public enum MoveType { NONE, DIRECT, DIRECT_HAND, DIRECT_LEADER }
+    public enum TargetType { NONE, NONE_WAIT, SINGLE, SINGLE_ONLY_OPPONENT, AREA_ALL, AREA_OPPONENT, AREA_SELF }
+    public enum EngineType { NONE, SHURIKEN, SOLID }
+}
+
+public class UIManager
+{
+    public static UIManager GetIns() => _ins ??= new UIManager();
+    private static UIManager _ins;
+
+    public enum ViewScene
+    {
+        None, Battle, Bingo, BuildDeckPurchasePage, CardAllList, CardSleevePurchasePage,
+        ClassSkinPurchasePage, Colosseum, CrossoverPortal, DeckList, Gacha, Gathering,
+        LeaderPopularityVote, LoginBonus, LotteryPage, Mission, MyPage,
+        NeutralPopularityVote, Profile, QuestSelectionPage, RankMatch, Room,
+        StorySelectPage, StorySelectionWorld, TwoPick,
+    }
+    public class ChangeViewSceneParam { }
+}
+
+public class GameMgr
+{
+    public static GameMgr GetIns() => _ins ??= new GameMgr();
+    private static GameMgr _ins;
+    public bool IsAdminWatch => false;
+    public bool IsWatchBattle => false;
+    public bool IsReplayBattle => false;
+    public EffectMgr GetEffectMgr() => _effect ??= new EffectMgr();
+    private EffectMgr _effect;
+}