MapData + Event 解耦已完成一轮收口

- `MapData` 已收口为纯初始化快照，不再承载 coin 写接口委托
- 已新增 `MapEntityLoadContext`
  - 用于把 `MapData` 快照与 coin 命令通道拆开传给地图加载
- `CombatLoadingState` 现在会组装：
  - `MapData`
  - `MapEntityLoadContext`
- `CombatLoadSession` / `EntityExtension.ShowMap(...)` 已切到 `MapEntityLoadContext`
- `MapEntity` 当前通过：
  - `MapEntityLoadContext` 获取初始快照与 coin 命令通道
  - `CombatCoinChangedEventArgs` 同步后续 coin 变化
- 已新增 `MapCombatRuntimeBridge`
  - 收口地图侧 coin 当前值、命令调用与事件订阅
- `MapEntity` 不再自己维护 `_currentCoin` 和 coin 事件订阅样板

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

@@ -20,7 +20,7 @@ namespace GeometryTD.CustomComponent
             Context.SettlementFlowService.OpenCombatFinishForm(
                 Context.SettlementContext,
                 Context.CombatFinishFormUseCase);
-            Flow.Scheduler.ChangeState(new CombatWaitingForReturnState(Context, Flow));
+            Flow.ChangeState(new CombatWaitingForReturnState(Context, Flow));
         }
     }
 }

Assets/GameMain/Scripts/CustomComponent/CombatNode/CombatScheduler/CombatStates/CombatLoadingState.cs

@@ -22,7 +22,7 @@ namespace GeometryTD.CustomComponent
             }
 
             MapEntityLoadContext mapLoadContext = BuildMapLoadContext();
-            if (!Context.LoadSession.StartLoading(Context.CurrentLevel, mapLoadContext, Flow.Scheduler, out string errorMessage))
+            if (!Context.LoadSession.StartLoading(Context.CurrentLevel, mapLoadContext, Flow.Host, out string errorMessage))
             {
                 Flow.EnterFailureFallback($"Combat loading failed. {errorMessage}");
             }
@@ -66,7 +66,7 @@ namespace GeometryTD.CustomComponent
                 participantTowerSnapshot: GameEntry.PlayerInventory != null
                     ? GameEntry.PlayerInventory.GetParticipantTowerSnapshot()
                     : null);
-            return new MapEntityLoadContext(mapData, Flow.Scheduler.TryConsumeCoin, Flow.Scheduler.AddCoin);
+            return new MapEntityLoadContext(mapData, Flow.TryConsumeCoin, Flow.AddCoin);
         }
     }
 }

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

@@ -25,7 +25,7 @@ namespace GeometryTD.CustomComponent
                     Flow.OnFullBaseHpRewardSelected,
                     Flow.OnFullBaseHpRewardGiveUp))
             {
-                Flow.Scheduler.ChangeState(new CombatFinishFormState(Context, Flow));
+                Flow.ChangeState(new CombatFinishFormState(Context, Flow));
             }
         }
 

Assets/GameMain/Scripts/CustomComponent/CombatNode/CombatScheduler/CombatStates/CombatRunningPhaseState.cs

@@ -62,7 +62,7 @@ namespace GeometryTD.CustomComponent
 
             if (Flow.ShouldEnterSettlementFromActiveState(out string reason, out bool isVictory))
             {
-                Flow.Scheduler.ChangeState(new CombatSettlementState(Context, Flow, reason, isVictory));
+                Flow.ChangeState(new CombatSettlementState(Context, Flow, reason, isVictory));
                 return;
             }
 

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

@@ -26,13 +26,13 @@ namespace GeometryTD.CustomComponent
                 Context.CurrentLevel,
                 Context.EnemyManager.DefeatedEnemyCount,
                 Context.CombatInRunResourceManager);
-            if (Context.SettlementContext.ShouldOpenRewardSelection)
+            if (Context.SettlementContext.Flow.ShouldOpenRewardSelection)
             {
-                Flow.Scheduler.ChangeState(new CombatRewardSelectionState(Context, Flow));
+                Flow.ChangeState(new CombatRewardSelectionState(Context, Flow));
                 return;
             }
 
-            Flow.Scheduler.ChangeState(new CombatFinishFormState(Context, Flow));
+            Flow.ChangeState(new CombatFinishFormState(Context, Flow));
         }
     }
 }

Assets/GameMain/Scripts/CustomComponent/CombatNode/CombatScheduler/CombatStates/CombatWaitingForPhaseEndState.cs

@@ -24,7 +24,7 @@ namespace GeometryTD.CustomComponent
 
             if (Flow.ShouldEnterSettlementFromActiveState(out string reason, out bool isVictory))
             {
-                Flow.Scheduler.ChangeState(new CombatSettlementState(Context, Flow, reason, isVictory));
+                Flow.ChangeState(new CombatSettlementState(Context, Flow, reason, isVictory));
                 return;
             }
 
@@ -43,4 +43,4 @@ namespace GeometryTD.CustomComponent
             Flow.CompleteCurrentPhase();
         }
     }
-}
+}