refactor 5:

- MapData.cs 现在会携带战斗初始上下文：
    - InitialCoin
    - 建塔 TowerStatsData 快照
    - TryConsumeCoin / AddCoin 运行时回调
- CombatLoadingState.cs 负责从 CombatInRunResourceManager 读取 coin 和 build stats 快照，组装 MapData 后再交给加载链。
- CombatLoadSession.cs 改成接收外部构造好的 MapData，不再自己只塞一个 LevelId。
- CombatScheduler.cs 不再在 Start() 里直接发起地图加载，加载细节回到 CombatLoadingState。
- MapEntity.cs 已经不再直接读 GameEntry.CombatNode 的 coin / build count / build stats，也不再通过它做 coin 读写：
    - 初始 coin 和 build stats 从 MapData 读取
    - 后续 coin 通过 CombatCoinChangedEventArgs 同步
    - 建塔/升级/拆塔时的 coin 变更通过 MapData 注入回调执行

Assets/GameMain/Scripts/CustomComponent/CombatNode/CombatScheduler/CombatLoadSession.cs

@@ -45,7 +45,7 @@ namespace GeometryTD.CustomComponent
             _currentMap = null;
         }
 
-        public bool StartLoading(DRLevel level, out string errorMessage)
+        public bool StartLoading(DRLevel level, MapData mapData, out string errorMessage)
         {
             errorMessage = null;
             if (_entity == null)
@@ -54,7 +54,7 @@ namespace GeometryTD.CustomComponent
                 return false;
             }
 
-            if (!TryShowMap(level, out errorMessage))
+            if (!TryShowMap(level, mapData, out errorMessage))
             {
                 return false;
             }
@@ -224,7 +224,7 @@ namespace GeometryTD.CustomComponent
             }
         }
 
-        private bool TryShowMap(DRLevel level, out string errorMessage)
+        private bool TryShowMap(DRLevel level, MapData mapData, out string errorMessage)
         {
             errorMessage = null;
             if (level == null)
@@ -242,7 +242,10 @@ namespace GeometryTD.CustomComponent
             }
 
             _loadingMapEntityId = _entity.GenerateSerialId();
-            _entity.ShowMap(new MapData(_loadingMapEntityId, level.Id, Vector3.zero), mapAssetName);
+            MapData resolvedMapData = mapData != null
+                ? mapData.CloneForEntity(_loadingMapEntityId, Vector3.zero)
+                : new MapData(_loadingMapEntityId, level.Id, Vector3.zero);
+            _entity.ShowMap(resolvedMapData, mapAssetName);
             return true;
         }
 
@@ -274,4 +277,4 @@ namespace GeometryTD.CustomComponent
             _isCombatInfoFormReady = false;
         }
     }
-}
+}

Assets/GameMain/Scripts/CustomComponent/CombatNode/CombatScheduler/CombatScheduler.cs

@@ -120,11 +120,6 @@ namespace GeometryTD.CustomComponent
                 return HandleStartFailure($"CombatScheduler start failed. Level '{level.Id}' has no phase data.");
             }
 
-            if (!_loadSession.StartLoading(level, out string loadError))
-            {
-                return HandleStartFailure($"CombatScheduler start failed. {loadError}");
-            }
-
             ChangeState(new CombatLoadingState(this));
             Log.Info(
                 "CombatScheduler started. Level={0}, PhaseCount={1}.",

Assets/GameMain/Scripts/CustomComponent/CombatNode/CombatStates/CombatLoadingState.cs

@@ -1,3 +1,8 @@
+using System.Collections.Generic;
+using GeometryTD.Definition;
+using GeometryTD.Entity.EntityData;
+using UnityEngine;
+
 namespace GeometryTD.CustomComponent
 {
     public partial class CombatScheduler
@@ -8,6 +13,21 @@ namespace GeometryTD.CustomComponent
             {
             }
 
+            public override void OnEnter()
+            {
+                if (Scheduler._currentLevel == null)
+                {
+                    Scheduler.EnterFailureFallback("Combat loading failed. Current level is null.");
+                    return;
+                }
+
+                MapData mapData = BuildMapData();
+                if (!Scheduler._loadSession.StartLoading(Scheduler._currentLevel, mapData, out string errorMessage))
+                {
+                    Scheduler.EnterFailureFallback($"Combat loading failed. {errorMessage}");
+                }
+            }
+
             public override void OnUpdate(float elapseSeconds, float realElapseSeconds)
             {
                 _ = elapseSeconds;
@@ -20,6 +40,29 @@ namespace GeometryTD.CustomComponent
 
                 Scheduler.TryBeginNextPhase();
             }
+
+            private MapData BuildMapData()
+            {
+                List<TowerStatsData> buildTowerStatsSnapshot = new();
+                for (int i = 0; i < Scheduler._combatInRunResourceManager.CurrentBuildTowerCount; i++)
+                {
+                    if (Scheduler._combatInRunResourceManager.TryGetBuildTowerStats(i, out TowerStatsData stats) &&
+                        stats != null)
+                    {
+                        buildTowerStatsSnapshot.Add(stats);
+                    }
+                }
+
+                return new MapData(
+                    entityId: 0,
+                    typeId: 0,
+                    levelId: Scheduler._currentLevel.Id,
+                    position: Vector3.zero,
+                    initialCoin: Scheduler._combatInRunResourceManager.CurrentCoin,
+                    buildTowerStatsSnapshot: buildTowerStatsSnapshot,
+                    tryConsumeCoin: Scheduler.TryConsumeCoin,
+                    addCoin: Scheduler.AddCoin);
+            }
         }
     }
 }