refactor 5:

- CombatSettlementFlowService.cs 负责结算上下文构建、基地血量奖励修正、奖励选择准备、奖励追加、结算背包提交、FinishForm 摘要准备。
- CombatSettlementContext.cs 变成独立共享上下文，不再作为 CombatScheduler 内部私有类。
- 状态链改成各司其职：
    - CombatSettlementState.cs 负责结束战斗现场并构建结算上下文。
    - CombatRewardSelectionState.cs 只负责进入奖励选择流程。
    - CombatFinishFormState.cs 只负责提交结算背包并打开 FinishForm。
- CombatScheduler.cs 删除了大块结算/奖励构建细节，保留状态切换、共享运行时和少量桥接回调。

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

@@ -1,5 +1,3 @@
-using UnityEngine;
-
 namespace GeometryTD.CustomComponent
 {
     public partial class CombatScheduler
@@ -18,9 +16,12 @@ namespace GeometryTD.CustomComponent
                     return;
                 }
 
-                Scheduler.CommitSettlementInventory(Scheduler._settlementContext);
-                Scheduler._settlementContext.GainedGold = Mathf.Max(0, Scheduler._combatInRunResourceManager.GainedGold);
-                Scheduler.OpenCombatFinishForm(Scheduler._settlementContext);
+                Scheduler._settlementFlowService.CommitSettlementInventory(Scheduler._settlementContext);
+                Scheduler.EnsureCombatFinishFormUseCaseBound();
+                Scheduler._settlementFlowService.OpenCombatFinishForm(
+                    Scheduler._settlementContext,
+                    Scheduler._combatInRunResourceManager,
+                    Scheduler._combatFinishFormUseCase);
                 Scheduler.ChangeState(new CombatWaitingForReturnState(Scheduler));
             }
         }

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

@@ -16,7 +16,15 @@ namespace GeometryTD.CustomComponent
                     return;
                 }
 
-                if (!Scheduler.TryPrepareRewardSelection(Scheduler._settlementContext))
+                Scheduler.EnsureRewardSelectFormUseCaseBound();
+                if (!Scheduler._settlementFlowService.TryPrepareRewardSelection(
+                        Scheduler._settlementContext,
+                        Scheduler._combatInRunResourceManager,
+                        Scheduler._phaseLoopRuntime.DisplayPhaseIndex,
+                        Scheduler.ResolveCurrentThemeType(),
+                        Scheduler._rewardSelectFormUseCase,
+                        Scheduler.OnFullBaseHpRewardSelected,
+                        Scheduler.OnFullBaseHpRewardGiveUp))
                 {
                     Scheduler.ChangeState(new CombatFinishFormState(Scheduler));
                 }

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

@@ -15,7 +15,15 @@ namespace GeometryTD.CustomComponent
 
             public override void OnEnter()
             {
-                Scheduler._settlementContext = Scheduler.BuildSettlementContext(_reason, _isVictory);
+                Scheduler._enemyManager.EndPhase();
+                Scheduler._enemyManager.CleanupTrackedEnemies();
+                Scheduler._isFinishAsVictory = _isVictory;
+                Scheduler._settlementContext = Scheduler._settlementFlowService.BuildSettlementContext(
+                    _reason,
+                    _isVictory,
+                    Scheduler._currentLevel,
+                    Scheduler._enemyManager.DefeatedEnemyCount,
+                    Scheduler._combatInRunResourceManager);
                 if (Scheduler._settlementContext.ShouldOpenRewardSelection)
                 {
                     Scheduler.ChangeState(new CombatRewardSelectionState(Scheduler));