```

feat(player): 添加玩家阵型保存功能

新增savedFormation字段用于存储玩家的阵型配置，
包括角色ID列表和对应的格子索引位置信息。
```

Assets/Script/BattleFormationSpawner.cs

@@ -25,7 +25,19 @@ public class BattleFormationSpawner : MonoBehaviour
 
     private void SpawnHeroes()
     {
-        // 1. 玩家编排过的阵型
+        // 1. 优先从 PlayerData.json 读取保存的阵型
+        if (PlayerDataManager.Instance != null)
+        {
+            SavedFormationData formationData = PlayerDataManager.Instance.LoadFormation();
+            if (formationData != null && formationData.characterIds != null && formationData.characterIds.Length > 0)
+            {
+                Debug.Log($"从 PlayerData.json 加载阵型，共 {formationData.characterIds.Length} 个英雄");
+                SpawnFromSavedFormation(formationData);
+                return;
+            }
+        }
+
+        // 2. 回退到 FormationData（场景间临时传递的数据）
         if (FormationData.HasCustomFormation
             && FormationData.HeroPrefabs != null
             && FormationData.HeroPrefabs.Length > 0)
@@ -42,10 +54,54 @@ public class BattleFormationSpawner : MonoBehaviour
             return;
         }
 
-        // 2. 没有编排数据：默认阵型
+        // 3. 没有任何编排数据：使用默认阵型
         SpawnDefaultFormation();
     }
 
+    /// <summary>
+    /// 从保存的阵型数据生成英雄
+    /// </summary>
+    private void SpawnFromSavedFormation(SavedFormationData formationData)
+    {
+        for (int i = 0; i < formationData.characterIds.Length; i++)
+        {
+            string characterId = formationData.characterIds[i];
+            int cell = i < formationData.cellIndices.Length ? formationData.cellIndices[i] : -1;
+
+            if (string.IsNullOrEmpty(characterId) || !DeployGrid.IsValidIndex(cell))
+            {
+                continue;
+            }
+
+            // 根据 characterId 找到对应的 Prefab
+            GameObject prefab = FindPrefabByCharacterId(characterId);
+            if (prefab != null)
+            {
+                Spawn(prefab, cell);
+            }
+            else
+            {
+                Debug.LogWarning($"未找到 characterId={characterId} 对应的 Prefab");
+            }
+        }
+    }
+
+    /// <summary>
+    /// 根据 characterId 查找对应的 Prefab
+    /// </summary>
+    private GameObject FindPrefabByCharacterId(string characterId)
+    {
+        var allData = Resources.LoadAll<CharacterData>("Data");
+        foreach (var data in allData)
+        {
+            if (data.characterId == characterId)
+            {
+                return data.unitPrefab;
+            }
+        }
+        return null;
+    }
+
     private void SpawnDefaultFormation()
     {
         if (roster == null || roster.heroes == null) return;
@@ -89,7 +145,7 @@ public class BattleFormationSpawner : MonoBehaviour
         return -1;
     }
 
-    private static int spawnedHeroCount = 0; // 记录已生成英雄数量
+    private int spawnedHeroCount = 0; // 记录已生成英雄数量（改为实例变量）
 
     private void Spawn(GameObject prefab, int cell)
     {
@@ -141,25 +197,49 @@ public class BattleFormationSpawner : MonoBehaviour
 
     private void BindHeroToCard(GameObject heroUnit, CharacterData characterData, Vector3 spawnPos)
     {
-        if (spawnedHeroCount >= 5) return; // 最多5个英雄
+        if (spawnedHeroCount >= 5)
+        {
+            Debug.LogWarning($"已达到最大英雄数量5，跳过绑定 {heroUnit.name}");
+            return; // 最多5个英雄
+        }
 
-        // 查找对应的卡片
-        Canvas canvas = FindObjectOfType<Canvas>();
-        if (canvas == null) return;
+        // 查找 TowerDefenseCanvas
+        GameObject canvasObj = GameObject.Find("TowerDefenseCanvas");
+        if (canvasObj == null)
+        {
+            Debug.LogError("BindHeroToCard: 未找到 TowerDefenseCanvas");
+            return;
+        }
 
-        Transform heroPanel = canvas.transform.Find("BottomUI/HeroCardsPanel");
-        if (heroPanel == null) return;
+        Transform heroPanel = canvasObj.transform.Find("BottomUI/HeroCardsPanel");
+        if (heroPanel == null)
+        {
+            Debug.LogError("BindHeroToCard: 未找到 BottomUI/HeroCardsPanel");
+            return;
+        }
 
         string cardName = $"HeroCard{spawnedHeroCount + 1}";
         Transform cardObj = heroPanel.Find(cardName);
-        if (cardObj == null) return;
+        if (cardObj == null)
+        {
+            Debug.LogError($"BindHeroToCard: 未找到 {cardName}");
+            return;
+        }
 
         HeroCardUI heroCardUI = cardObj.GetComponent<HeroCardUI>();
-        if (heroCardUI == null) return;
+        if (heroCardUI == null)
+        {
+            Debug.LogError($"BindHeroToCard: {cardName} 缺少 HeroCardUI 组件");
+            return;
+        }
 
         // 获取英雄单位组件
         UnitBase unitBase = heroUnit.GetComponent<UnitBase>();
-        if (unitBase == null) return;
+        if (unitBase == null)
+        {
+            Debug.LogError($"BindHeroToCard: {heroUnit.name} 缺少 UnitBase 组件");
+            return;
+        }
 
         // 加载对应的头像
         UnityEngine.Sprite icon = characterData != null ? characterData.cardIcon : null;
@@ -169,7 +249,7 @@ public class BattleFormationSpawner : MonoBehaviour
         
         spawnedHeroCount++;
         
-        Debug.Log($"英雄 {heroUnit.name} 已绑定到 {cardName}");
+        Debug.Log($"✅ {cardName} 已绑定英雄: {heroUnit.name}（第 {spawnedHeroCount} 个）");
     }
 
     private CharacterData FindCharacterDataForPrefab(GameObject prefab)