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/BossRushSpecialSkill.cs

@@ -0,0 +1,40 @@
+using LitJson;
+
+namespace Wizard;
+
+public class BossRushSpecialSkill
+{
+	public int OriginalCardId;
+
+	public string Name;
+
+	public string SkillText;
+
+	public string SkillDescText;
+
+	public bool IsEnemySkill => OriginalCardId == -1;
+
+	public bool IsFoil { get; set; }
+
+	public BossRushSpecialSkill()
+	{
+	}
+
+	public BossRushSpecialSkill(int cardId, string name, string skillText, string skillDescText, bool isFoil)
+	{
+		OriginalCardId = cardId;
+		Name = name;
+		SkillText = skillText;
+		SkillDescText = skillDescText;
+		IsFoil = isFoil;
+	}
+
+	public BossRushSpecialSkill(JsonData jsonData)
+	{
+		OriginalCardId = jsonData["original_card_id"].ToInt();
+		Name = jsonData["name"].ToString();
+		SkillText = jsonData["skill_text"].ToString();
+		SkillDescText = jsonData["skill_desc_text"].ToString();
+		IsFoil = jsonData["is_foil"].ToBoolean();
+	}
+}