refactor 6:

- CombatInfoFormUseCase.cs 改成回调驱动：
    - 不再直接读 GameEntry.CombatNode
    - 由 CombatLoadSession.cs 在打开 CombatInfoForm 前注入 modelProvider 和 TryEndCombat 回调
- CombatSelectFormUseCase.cs 的默认 coin provider 改成返回 0，不再偷偷 fallback 到 GameEntry.CombatNode
- CombatFinishFormUseCase.cs 去掉了未准备 summary 时对 GameEntry.CombatNode 的兜底读取
- MapData.cs 进一步补充了战斗初始快照：
    - InventorySnapshot
    - ParticipantTowerSnapshot
- CombatLoadingState.cs 现在会把这些背包/参战塔快照也一起打进 MapData
- MapEntity.cs 配置建塔面板时不再直接读 PlayerInventory，改为用 MapData 里的快照

Assets/GameMain/Scripts/Entity/EntityData/MapData.cs

@@ -12,6 +12,8 @@ namespace GeometryTD.Entity.EntityData
         [SerializeField] private int _levelId = 0;
         [SerializeField] private int _initialCoin = 0;
         [SerializeField] private TowerStatsData[] _buildTowerStatsSnapshot = Array.Empty<TowerStatsData>();
+        [SerializeField] private BackpackInventoryData _inventorySnapshot;
+        [SerializeField] private TowerItemData[] _participantTowerSnapshot = Array.Empty<TowerItemData>();
 
         [NonSerialized] private Func<int, bool> _tryConsumeCoin;
         [NonSerialized] private Action<int> _addCoin;
@@ -33,6 +35,8 @@ namespace GeometryTD.Entity.EntityData
             Vector3 position,
             int initialCoin,
             IReadOnlyList<TowerStatsData> buildTowerStatsSnapshot,
+            BackpackInventoryData inventorySnapshot,
+            IReadOnlyList<TowerItemData> participantTowerSnapshot,
             Func<int, bool> tryConsumeCoin,
             Action<int> addCoin) : base(entityId, typeId)
         {
@@ -40,6 +44,10 @@ namespace GeometryTD.Entity.EntityData
             Position = position;
             _initialCoin = Mathf.Max(0, initialCoin);
             SetBuildTowerStatsSnapshot(buildTowerStatsSnapshot);
+            _inventorySnapshot = inventorySnapshot != null
+                ? InventoryCloneUtility.CloneInventory(inventorySnapshot)
+                : null;
+            SetParticipantTowerSnapshot(participantTowerSnapshot);
             _tryConsumeCoin = tryConsumeCoin;
             _addCoin = addCoin;
         }
@@ -57,6 +65,10 @@ namespace GeometryTD.Entity.EntityData
         }
 
         public int CurrentBuildTowerCount => _buildTowerStatsSnapshot != null ? _buildTowerStatsSnapshot.Length : 0;
+        public BackpackInventoryData InventorySnapshot => _inventorySnapshot != null
+            ? InventoryCloneUtility.CloneInventory(_inventorySnapshot)
+            : null;
+        public IReadOnlyList<TowerItemData> ParticipantTowerSnapshot => _participantTowerSnapshot;
 
         public void BindCombatCallbacks(Func<int, bool> tryConsumeCoin, Action<int> addCoin)
         {
@@ -128,8 +140,25 @@ namespace GeometryTD.Entity.EntityData
                 position,
                 _initialCoin,
                 _buildTowerStatsSnapshot,
+                _inventorySnapshot,
+                _participantTowerSnapshot,
                 _tryConsumeCoin,
                 _addCoin);
         }
+
+        public void SetParticipantTowerSnapshot(IReadOnlyList<TowerItemData> participantTowerSnapshot)
+        {
+            if (participantTowerSnapshot == null || participantTowerSnapshot.Count <= 0)
+            {
+                _participantTowerSnapshot = Array.Empty<TowerItemData>();
+                return;
+            }
+
+            _participantTowerSnapshot = new TowerItemData[participantTowerSnapshot.Count];
+            for (int i = 0; i < participantTowerSnapshot.Count; i++)
+            {
+                _participantTowerSnapshot[i] = InventoryCloneUtility.CloneTower(participantTowerSnapshot[i]);
+            }
+        }
     }
 }