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/Timer.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections;
+using UnityEngine;
+
+public class Timer
+{
+	public delegate void OnEndDelegate();
+
+	public float RemainTimeSec;
+
+	public bool IsEnd { get; protected set; }
+
+	public event OnEndDelegate onEndEvent;
+
+	public Timer(float time, OnEndDelegate onEndEvent)
+	{
+		RemainTimeSec = time;
+		this.onEndEvent = onEndEvent;
+		IsEnd = false;
+	}
+
+	public virtual void Update()
+	{
+		if (!IsEnd)
+		{
+			RemainTimeSec -= Time.deltaTime;
+			if (!(RemainTimeSec > 0f))
+			{
+				IsEnd = true;
+				CallEvent();
+			}
+		}
+	}
+
+	public void CallEvent()
+	{
+		this.onEndEvent();
+	}
+
+	public void Cancel()
+	{
+		IsEnd = true;
+	}
+
+	public static IEnumerator DelayMethod(float waitTime, Action process)
+	{
+		yield return new WaitForSeconds(waitTime);
+		process?.Invoke();
+	}
+}