feat(combat): 弹反投射物伤害目标层改为显式配置

ProjectileConfigSO 新增 ReflectedTargetLayers：弹反后写入 HitBox.TargetLayers 的目标层显式配置；留空(Nothing)有明确缺省语义=自动翻转（PlayerHurtBox 位换 EnemyHurtBox 位、其余位保留）。Projectile/ParryableProjectile 两条弹反路径统一走 ApplyReflectedTargetLayers。现有 6 个投射物配置资产已显式配为 EnemyHurtBox。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Assets/_Game/Data/Combat/Projectiles/PROJ_Boomerang_Config.asset

@@ -13,6 +13,7 @@ MonoBehaviour:
   m_Name: PROJ_Boomerang_Config
   m_EditorClassIdentifier: 
   DamageSource: {fileID: 11400000, guid: caae9c7600281fe4e8d8637fa3fd2ca1, type: 2}
+  MaxHits: 1
   Speed: 10
   Lifetime: 6
   LaunchAngleDeg: 0
@@ -21,3 +22,6 @@ MonoBehaviour:
   PoolKey: PROJ_Boomerang
   ParrySpeedMultiplier: 1.2
   ParryDamageMultiplier: 2
+  ReflectedTargetLayers:
+    serializedVersion: 2
+    m_Bits: 134217728

Assets/_Game/Data/Combat/Projectiles/PROJ_FeiZhi_Acid_Config.asset

@@ -13,6 +13,7 @@ MonoBehaviour:
   m_Name: PROJ_FeiZhi_Acid_Config
   m_EditorClassIdentifier: 
   DamageSource: {fileID: 11400000, guid: caae9c7600281fe4e8d8637fa3fd2ca1, type: 2}
+  MaxHits: 1
   Speed: 9
   Lifetime: 4
   LaunchAngleDeg: 45
@@ -21,3 +22,6 @@ MonoBehaviour:
   PoolKey: PROJ_FeiZhi_Acid
   ParrySpeedMultiplier: 1.2
   ParryDamageMultiplier: 2
+  ReflectedTargetLayers:
+    serializedVersion: 2
+    m_Bits: 134217728

Assets/_Game/Data/Combat/Projectiles/PROJ_TornadoLarge_Config.asset

@@ -13,6 +13,7 @@ MonoBehaviour:
   m_Name: PROJ_TornadoLarge_Config
   m_EditorClassIdentifier: 
   DamageSource: {fileID: 11400000, guid: caae9c7600281fe4e8d8637fa3fd2ca1, type: 2}
+  MaxHits: 1
   Speed: 0
   Lifetime: 5
   LaunchAngleDeg: 0
@@ -21,3 +22,6 @@ MonoBehaviour:
   PoolKey: PROJ_TornadoLarge
   ParrySpeedMultiplier: 1.2
   ParryDamageMultiplier: 2
+  ReflectedTargetLayers:
+    serializedVersion: 2
+    m_Bits: 134217728

Assets/_Game/Data/Combat/Projectiles/PROJ_TornadoSmall_Config.asset

@@ -13,6 +13,7 @@ MonoBehaviour:
   m_Name: PROJ_TornadoSmall_Config
   m_EditorClassIdentifier: 
   DamageSource: {fileID: 11400000, guid: caae9c7600281fe4e8d8637fa3fd2ca1, type: 2}
+  MaxHits: 1
   Speed: 7
   Lifetime: 4
   LaunchAngleDeg: 0
@@ -21,3 +22,6 @@ MonoBehaviour:
   PoolKey: PROJ_TornadoSmall
   ParrySpeedMultiplier: 1.2
   ParryDamageMultiplier: 2
+  ReflectedTargetLayers:
+    serializedVersion: 2
+    m_Bits: 134217728

Assets/_Game/Data/Combat/Projectiles/PROJ_WindStone_Config.asset

@@ -13,6 +13,7 @@ MonoBehaviour:
   m_Name: PROJ_WindStone_Config
   m_EditorClassIdentifier: 
   DamageSource: {fileID: 11400000, guid: caae9c7600281fe4e8d8637fa3fd2ca1, type: 2}
+  MaxHits: 1
   Speed: 6
   Lifetime: 4
   LaunchAngleDeg: -90
@@ -21,3 +22,6 @@ MonoBehaviour:
   PoolKey: PROJ_WindStone
   ParrySpeedMultiplier: 1.2
   ParryDamageMultiplier: 2
+  ReflectedTargetLayers:
+    serializedVersion: 2
+    m_Bits: 134217728

Assets/_Game/Data/Combat/Projectiles/PROJ_ZhiMu_Acid_Config.asset

@@ -13,6 +13,7 @@ MonoBehaviour:
   m_Name: PROJ_ZhiMu_Acid_Config
   m_EditorClassIdentifier: 
   DamageSource: {fileID: 11400000, guid: caae9c7600281fe4e8d8637fa3fd2ca1, type: 2}
+  MaxHits: 1
   Speed: 9
   Lifetime: 4
   LaunchAngleDeg: 45
@@ -21,3 +22,6 @@ MonoBehaviour:
   PoolKey: PROJ_ZhiMu_Acid
   ParrySpeedMultiplier: 1.2
   ParryDamageMultiplier: 2
+  ReflectedTargetLayers:
+    serializedVersion: 2
+    m_Bits: 134217728

Assets/_Game/Scripts/Combat/ParryableProjectile.cs

@@ -36,10 +36,10 @@ namespace BaseGames.Combat
 
                     // 阵营随弹反翻转：切到 PlayerProjectile 层（否则碰撞矩阵
                     // EnemyProjectile↔EnemyHurtBox 不碰撞，反射后永远打不中敌人），
-                    // 伤害目标层同步从玩家侧切到敌人侧。
+                    // 伤害目标层同步切换（优先取配置的 ReflectedTargetLayers）。
                     int playerProjLayer = LayerMask.NameToLayer("PlayerProjectile");
                     if (playerProjLayer >= 0) gameObject.layer = playerProjLayer;
-                    RetargetToEnemyFaction();
+                    ApplyReflectedTargetLayers();
 
                     if (_reflectSource != null)
                         DamageInfo = DamageInfo.From(_reflectSource);

Assets/_Game/Scripts/Combat/Projectile.cs

@@ -87,8 +87,8 @@ namespace BaseGames.Combat
             // 重置 HitBox 命中记录，确保反射后可命中新目标
             _hitBox.Deactivate();
             _hitBox.Activate(_config?.DamageSource);
-            // 伤害目标随阵营翻转：玩家侧 → 敌人侧
-            RetargetToEnemyFaction();
+            // 伤害目标随阵营切换（优先取配置的显式目标层）
+            ApplyReflectedTargetLayers();
 
             // 反射后重置命中预算，并跳过本次（弹反）命中的扣减，避免反射后立即被回收
             _hitsRemaining = _maxHits;
@@ -96,11 +96,18 @@ namespace BaseGames.Combat
         }
 
         /// <summary>
-        /// 弹反换阵营后，把伤害目标从玩家侧切到敌人侧
-        /// （仅交换 PlayerHurtBox→EnemyHurtBox 位，保留可破坏物等其他目标层）。
+        /// 弹反换阵营后应用伤害目标层：
+        /// 优先使用 <see cref="ProjectileConfigSO.ReflectedTargetLayers"/> 的显式配置；
+        /// 未配置（Nothing）时自动翻转——仅交换 PlayerHurtBox→EnemyHurtBox 位，
+        /// 保留可破坏物等其他目标层。
         /// </summary>
-        protected void RetargetToEnemyFaction()
+        protected void ApplyReflectedTargetLayers()
         {
+            if (_config != null && _config.ReflectedTargetLayers.value != 0)
+            {
+                _hitBox.TargetLayers = _config.ReflectedTargetLayers;
+                return;
+            }
             int playerHurt = LayerMask.NameToLayer("PlayerHurtBox");
             int enemyHurt  = LayerMask.NameToLayer("EnemyHurtBox");
             if (playerHurt < 0 || enemyHurt < 0) return; // Layer 尚未创建，保留现有掩码

Assets/_Game/Scripts/Combat/ProjectileConfigSO.cs

@@ -26,5 +26,8 @@ namespace BaseGames.Combat
         [Header("弹反")]
         public float ParrySpeedMultiplier  = 1.2f;
         public float ParryDamageMultiplier = 2.0f;
+        [Tooltip("弹反后本投射物可造成伤害判定的 Layer（显式配置，写入 HitBox.TargetLayers）。" +
+                 "留空(Nothing) = 自动翻转：在原目标层基础上 PlayerHurtBox 位换为 EnemyHurtBox 位、其余位保留。")]
+        public LayerMask ReflectedTargetLayers;
     }
 }