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/Engine/DepthBlurAndBloom.cs

@@ -0,0 +1,46 @@
+public class DepthBlurAndBloom
+{
+	public enum DofFocalType
+	{
+		Transform,
+		Position,
+		Point
+	}
+
+	public enum DofBlur
+	{
+		Horizon,
+		Mixed,
+		Disc,
+		BallBlur
+	}
+
+	public enum DofQuality
+	{
+		OnlyBackground = 1,
+		BackgroundAndForeground = 5
+	}
+
+	public enum DofTransformTarget
+	{
+		Character0,
+		Character1,
+		Character2,
+		Character3,
+		Character4,
+		Character5,
+		Character6,
+		Character7,
+		Character8,
+		Character9,
+		Character10,
+		Character11,
+		Character12,
+		Character13,
+		Character14,
+		Character15,
+		Character16,
+		Character17,
+		Character18
+	}
+}