diff --git a/Assets/_Game/Scripts/Core/AutoSaveService.cs b/Assets/_Game/Scripts/Core/AutoSaveService.cs
index bf26d9d..e7b98cd 100644
--- a/Assets/_Game/Scripts/Core/AutoSaveService.cs
+++ b/Assets/_Game/Scripts/Core/AutoSaveService.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Collections;
 using UnityEngine;
 using BaseGames.Core.Events;
@@ -105,12 +106,20 @@ namespace BaseGames.Core
 #if UNITY_EDITOR || DEVELOPMENT_BUILD
                 Debug.Log($"[AutoSave] 触发：{reason}");
 #endif
-                // 与手动存档使用相同槽位，fire-and-forget
-                _ = svc.SaveAsync(svc.ActiveSlot);
+                RunFireAndForget(svc.SaveAsync(svc.ActiveSlot), reason);
             }
 
             yield return new WaitForSecondsRealtime(_cooldownSeconds);
             _onCooldown = false;
         }
+
+        private static async void RunFireAndForget(System.Threading.Tasks.Task task, string context)
+        {
+            try { await task; }
+            catch (Exception e)
+            {
+                Debug.LogError($"[AutoSave] {context} 存档失败: {e.Message}\n{e.StackTrace}");
+            }
+        }
     }
 }
diff --git a/Assets/_Game/Scripts/Core/GameServiceRegistrar.cs b/Assets/_Game/Scripts/Core/GameServiceRegistrar.cs
index c1272b0..15076a1 100644
--- a/Assets/_Game/Scripts/Core/GameServiceRegistrar.cs
+++ b/Assets/_Game/Scripts/Core/GameServiceRegistrar.cs
@@ -232,5 +232,10 @@ namespace BaseGames.Core
         public System.Collections.Generic.IEnumerable<string> GetCompletedChains() => _save.GetCompletedChains();
         public void   SetChainCompleted(string chainId)             => _save.SetChainCompleted(chainId);
         public void   MarkBossDefeated(string bossId)               => _save.MarkBossDefeated(bossId);
+
+        // ── 存档槽管理（主菜单 UI 用）─────────────────────────────────────────
+        public System.Threading.Tasks.Task<BaseGames.Core.Save.SlotSummary> GetSlotSummaryAsync(int slotIndex)
+            => _save.GetSlotSummaryAsync(slotIndex);
+        public void CreateSlot(int slotIndex) => _save.CreateSlot(slotIndex);
     }
 }
diff --git a/Assets/_Game/Scripts/Core/ISaveService.cs b/Assets/_Game/Scripts/Core/ISaveService.cs
index 228b078..031b43b 100644
--- a/Assets/_Game/Scripts/Core/ISaveService.cs
+++ b/Assets/_Game/Scripts/Core/ISaveService.cs
@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
+using BaseGames.Core.Save;
 
 namespace BaseGames.Core
 {
@@ -76,5 +77,13 @@ namespace BaseGames.Core
 
         /// <summary>标记某个 Boss 已被击败，立即写入当前 SaveData（无需等待下次存档）。</summary>
         void MarkBossDefeated(string bossId);
+
+        // ── 存档槽管理（主菜单 UI 用）────────────────────────────────────────
+
+        /// <summary>读取指定存档槽摘要数据用于 UI 展示；槽不存在时返回 null。</summary>
+        Task<SlotSummary> GetSlotSummaryAsync(int slotIndex);
+
+        /// <summary>新建存档槽（不写盘，仅初始化内存 SaveData 并设定活跃槽索引）。</summary>
+        void CreateSlot(int slotIndex);
     }
 }
diff --git a/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs b/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs
index 70cf6c5..a135abd 100644
--- a/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs
+++ b/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs
@@ -127,7 +127,7 @@ namespace BaseGames.Core.Save
                     return false;
                 }
 
-                if (!ValidateChecksum(loaded, json))
+                if (!ValidateChecksum(loaded))
                 {
                     if (loaded.Meta.IsSteelSoul)
                     {
@@ -278,7 +278,7 @@ namespace BaseGames.Core.Save
             return gameSecret;
         }
 
-        private bool ValidateChecksum(SaveData data, string rawJson)
+        private bool ValidateChecksum(SaveData data)
         {
             if (string.IsNullOrEmpty(data?.Meta?.Checksum)) return true;
             var saved = data.Meta.Checksum;
diff --git a/Assets/_Game/Scripts/Support/Speedrun/SpeedrunTimer.cs b/Assets/_Game/Scripts/Support/Speedrun/SpeedrunTimer.cs
index 2ecfdd1..123d41a 100644
--- a/Assets/_Game/Scripts/Support/Speedrun/SpeedrunTimer.cs
+++ b/Assets/_Game/Scripts/Support/Speedrun/SpeedrunTimer.cs
@@ -28,6 +28,16 @@ public class SpeedrunTimer : MonoBehaviour, ISaveable
     /// <summary>上一帧已显示的整秒值，展示内容未变化时跳过字符串重建。</summary>
     private int  _lastDisplayedSecond = -1;
 
+    private void OnEnable()
+    {
+        ServiceLocator.GetOrDefault<ISaveableRegistry>()?.Register(this);
+    }
+
+    private void OnDisable()
+    {
+        ServiceLocator.GetOrDefault<ISaveableRegistry>()?.Unregister(this);
+    }
+
     private void Start()
     {
         bool show = _settings != null && _settings.ShowSpeedrunTimer;
diff --git a/Assets/_Game/Scripts/UI/Menus/SaveSlotController.cs b/Assets/_Game/Scripts/UI/Menus/SaveSlotController.cs
index b7d33d8..370a355 100644
--- a/Assets/_Game/Scripts/UI/Menus/SaveSlotController.cs
+++ b/Assets/_Game/Scripts/UI/Menus/SaveSlotController.cs
@@ -3,6 +3,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using UnityEngine.UI;
 using TMPro;
+using BaseGames.Core;
 using BaseGames.Core.Events;
 using BaseGames.Core.Save;
 
@@ -14,7 +15,6 @@ namespace BaseGames.UI.Menus
     public class SaveSlotController : MonoBehaviour
     {
         [SerializeField] private SaveSlotUI[]      _slotUIs;        // 存档槽 UI（数量由 Inspector 决定）
-        [SerializeField] private GameSaveManager       _saveManager;
 
         [Header("Event Channels")]
         [SerializeField] private IntEventChannelSO _onSlotConfirmed; // 携带槽索引，供 GameManager 监听
@@ -22,7 +22,6 @@ namespace BaseGames.UI.Menus
         private void OnEnable()
         {
             var task = RefreshAsync();
-            // 捕获 async Task 异常，避免 async void 吞掉未处理异常
             task.ContinueWith(t =>
             {
                 if (t.IsFaulted)
@@ -32,11 +31,12 @@ namespace BaseGames.UI.Menus
 
         private async Task RefreshAsync()
         {
-            if (_saveManager == null) return;
+            var svc = ServiceLocator.GetOrDefault<ISaveService>();
+            if (svc == null) return;
             for (int i = 0; i < _slotUIs.Length; i++)
             {
                 if (_slotUIs[i] == null) continue;
-                var summary = await _saveManager.GetSlotSummaryAsync(i);
+                var summary = await svc.GetSlotSummaryAsync(i);
                 _slotUIs[i].Refresh(summary);
             }
         }
@@ -44,16 +44,19 @@ namespace BaseGames.UI.Menus
         /// <summary>选中指定槽位（新局或继续）。由 SaveSlotUI 内部按钮调用。</summary>
         public void OnSlotSelected(int slotIndex)
         {
-            if (slotIndex < 0 || slotIndex >= _slotUIs.Length || _saveManager == null) return;
+            if (slotIndex < 0 || slotIndex >= _slotUIs.Length) return;
             _ = SelectSlotAsync(slotIndex);
         }
 
         private async Task SelectSlotAsync(int slotIndex)
         {
-            if (_saveManager.SlotExists(slotIndex))
-                await _saveManager.LoadAsync(slotIndex);
+            var svc = ServiceLocator.GetOrDefault<ISaveService>();
+            if (svc == null) return;
+
+            if (svc.HasSave(slotIndex))
+                await svc.LoadAsync(slotIndex);
             else
-                _saveManager.CreateSlot(slotIndex);
+                svc.CreateSlot(slotIndex);
 
             _onSlotConfirmed?.Raise(slotIndex);
         }
@@ -61,13 +64,15 @@ namespace BaseGames.UI.Menus
         /// <summary>删除指定槽位存档并刷新 UI。由 SaveSlotUI 内部按钮调用。</summary>
         public void OnSlotDeleteRequested(int slotIndex)
         {
-            if (slotIndex < 0 || slotIndex >= _slotUIs.Length || _saveManager == null) return;
+            if (slotIndex < 0 || slotIndex >= _slotUIs.Length) return;
             _ = DeleteAndRefreshAsync(slotIndex);
         }
 
         private async Task DeleteAndRefreshAsync(int slotIndex)
         {
-            await _saveManager.DeleteSlotAsync(slotIndex);
+            var svc = ServiceLocator.GetOrDefault<ISaveService>();
+            if (svc == null) return;
+            await svc.DeleteSlotAsync(slotIndex);
             await RefreshAsync();
         }
     }
diff --git a/Assets/_Game/Scripts/World/WorldStateRegistrySaver.cs b/Assets/_Game/Scripts/World/WorldStateRegistrySaver.cs
index 1abfb83..d20cd0e 100644
--- a/Assets/_Game/Scripts/World/WorldStateRegistrySaver.cs
+++ b/Assets/_Game/Scripts/World/WorldStateRegistrySaver.cs
@@ -8,8 +8,8 @@ namespace BaseGames.World
     /// 挂载位置：Persistent 场景的根 GameObject（与 GameServiceRegistrar 同级）。
     /// 需在 Inspector 中绑定场景中唯一的 WorldStateRegistry ScriptableObject 资源。
     ///
-    /// OnSave：从 Registry 读取 Collectible / Destroyed / Flag 三个分类，写入 SaveData。
-    ///         SavePoint 和 Door 两个分类由各自的 SaveableMonoBehaviour 独立写入，此处跳过。
+    /// OnSave：从 Registry 读取 Collectible / Destroyed / Door / Flag 四个分类，写入 SaveData。
+    ///         每个分类在写入前先 Clear，确保运行时删除的状态不会残留在存档里。
     /// OnLoad：将完整的 SaveData 传递给 Registry，恢复所有分类的运行时缓存。
     ///         这是 Registry 从空白变为"知道世界状态"的唯一时机。
     /// </summary>
@@ -29,6 +29,12 @@ namespace BaseGames.World
             foreach (var id in _registry.GetAllIds(WorldObjectCategory.Destroyed))
                 data.World.DestroyedObjectIds.Add(id);
 
+            data.World.OpenedDoors.Clear();
+            foreach (var id in _registry.GetAllIds(WorldObjectCategory.Door))
+                data.World.OpenedDoors.Add(id);
+
+            // 清除所有 Flag 后重写，确保运行时 ClearFlag() 的变更能正确落盘
+            data.EventChains.WorldFlags.Clear();
             foreach (var id in _registry.GetAllIds(WorldObjectCategory.Flag))
                 data.EventChains.WorldFlags[id] = true;
         }