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/Wizard/SpeedChallengeInfo.cs

@@ -0,0 +1,43 @@
+using System;
+using LitJson;
+
+namespace Wizard;
+
+public class SpeedChallengeInfo
+{
+	public DateTime Begin { get; private set; }
+
+	public DateTime ApplyEnd { get; private set; }
+
+	public DateTime Announce { get; private set; }
+
+	public DateTime End { get; private set; }
+
+	public string Message { get; private set; }
+
+	public string ApplyUrl { get; private set; }
+
+	public SpeedChallengeInfo(JsonData data)
+	{
+		Parse(data);
+	}
+
+	private void Parse(JsonData data)
+	{
+		if (data.TryGetValue("schedule", out var value))
+		{
+			Begin = DateTime.Parse(value["begin_time"].ToString());
+			ApplyEnd = DateTime.Parse(value["apply_end_time"].ToString());
+			Announce = DateTime.Parse(value["announce_time"].ToString());
+			End = DateTime.Parse(value["end_time"].ToString());
+		}
+		if (data.TryGetValue("dialog_message", out var value2))
+		{
+			Message = value2.ToString().Replace("\\n", "\n");
+		}
+		if (data.TryGetValue("apply_url", out var value3))
+		{
+			ApplyUrl = value3.ToString();
+		}
+	}
+}