补全 CombatNode 逻辑 + 重构 EnemyManager

- 添加了关卡内的难度系数与掉落
    - 难度系数：每循环一轮波次敌人血量翻倍
    - 道具掉落：按照掉落概率曲线根据波次计算当前爆率，并从新增的道具池里选择道具
    - `CombatResourceManager`：统一维护关卡内资源状态（硬币/金币/道具掉落）
- 重构 `EnemyManager`：
    - `EnemyManager`：编排子服务，不承载具体业务细节
    - `EnemySpawnDirector`：管理刷怪时序
    - `SpawnerResolver`：管理出生点与路径
    - `EnemyLifecycleTracker`：追踪敌人生命周期
    - `EnemyConfigService`：管理敌人配置与倍率

Assets/GameMain/Scripts/UI/Combat/Controller/CombatInfoFormController.cs

@@ -23,6 +23,7 @@ namespace GeometryTD.UI
             GameEntry.Event.Subscribe(CombatProcessEventArgs.EventId, OnCombatProcessChanged);
             GameEntry.Event.Subscribe(CombatCoinChangedEventArgs.EventId, OnCombatCoinChanged);
             GameEntry.Event.Subscribe(CombatBaseHpChangedEventArgs.EventId, OnCombatBaseHpChanged);
+            GameEntry.Event.Subscribe(CombatEnemyHpRateChangedEventArgs.EventId, OnCombatEnemyHpRateChanged);
         }
 
         protected override void UnsubscribeCustomEvents()
@@ -32,6 +33,7 @@ namespace GeometryTD.UI
             GameEntry.Event.Unsubscribe(CombatProcessEventArgs.EventId, OnCombatProcessChanged);
             GameEntry.Event.Unsubscribe(CombatCoinChangedEventArgs.EventId, OnCombatCoinChanged);
             GameEntry.Event.Unsubscribe(CombatBaseHpChangedEventArgs.EventId, OnCombatBaseHpChanged);
+            GameEntry.Event.Unsubscribe(CombatEnemyHpRateChangedEventArgs.EventId, OnCombatEnemyHpRateChanged);
         }
 
         public int? OpenUI(CombatInfoFormRawData rawData)
@@ -92,6 +94,7 @@ namespace GeometryTD.UI
                 LevelPhaseText = BuildPhaseText(rawData.CurrentPhaseIndex, rawData.TotalPhaseCount),
                 CoinText = BuildCoinText(rawData.Coin),
                 BaseHpText = BuildBaseHpText(rawData.BaseHp, rawData.BaseHpMax),
+                EnemyHpRateText = BuildEnemyHpRateText(rawData.EnemyHpRateMultiplier),
                 CanPause = rawData.CanPause,
                 CanEnd = rawData.CanEnd
             };
@@ -140,6 +143,12 @@ namespace GeometryTD.UI
             return $"\u57FA\u5730\uFF1A{percent}%";
         }
 
+        private static string BuildEnemyHpRateText(int enemyHpRateMultiplier)
+        {
+            int resolvedMultiplier = enemyHpRateMultiplier > 0 ? enemyHpRateMultiplier : 1;
+            return $"\u96BE\u5EA6\uFF1A{resolvedMultiplier}x";
+        }
+
         private void OnCombatPauseButtonClicked(object sender, GameEventArgs e)
         {
             if (!(sender is CombatInfoForm) || !(e is CombatPauseEventArgs))
@@ -197,6 +206,16 @@ namespace GeometryTD.UI
             RefreshFromUseCase();
         }
 
+        private void OnCombatEnemyHpRateChanged(object sender, GameEventArgs e)
+        {
+            if (!(e is CombatEnemyHpRateChangedEventArgs))
+            {
+                return;
+            }
+
+            RefreshFromUseCase();
+        }
+
         private void RefreshFromUseCase()
         {
             if (_useCase == null)