feat(battle-engine): M1 auto-copy closure (782 battle-logic files)

Compile-driven bulk-copy loop (tools/engine-port/m1_copy_loop.py) pulled the precise reference closure of the battle-core roots, stopping at the classify god-object/View-VFX-UI boundary. 782 files; no re-explosion (M0 had estimated ~order 1000). Residual frontier = 52 shim-classified + 80 external (Unity/BCL) types to author next.

SVSim.BattleEngine/Engine/Wizard/SecretBossInfo.cs

@@ -0,0 +1,27 @@
+using LitJson;
+
+namespace Wizard;
+
+public class SecretBossInfo
+{
+	public bool IsEnable { get; }
+
+	public int CharaId { get; }
+
+	public bool IsCleared { get; }
+
+	public SecretBossInfo(JsonData data)
+	{
+		if (!data.TryGetValue("bossrush_info", out var value))
+		{
+			IsEnable = false;
+			return;
+		}
+		if (value.TryGetValue("hidden_boss_character_info", out var value2))
+		{
+			CharaId = value2["texture_id"].ToInt();
+		}
+		IsEnable = value.GetValueOrDefault("is_hidden_boss_playable", defaultValue: false);
+		IsCleared = value.GetValueOrDefault("is_win_hidden_boss", 0) != 0;
+	}
+}