feat: 优化存档管理，添加异步加载槽位摘要功能，减少主菜单等待时间

Assets/_Game/Scripts/UI/Menus/SaveSlotController.cs

@@ -33,11 +33,18 @@ namespace BaseGames.UI.Menus
         {
             var svc = ServiceLocator.GetOrDefault<ISaveService>();
             if (svc == null) return;
+
+            // 并行加载所有槽位摘要，减少主菜单等待时间
+            var tasks = new Task<SlotSummary>[_slotUIs.Length];
+            for (int i = 0; i < _slotUIs.Length; i++)
+                tasks[i] = svc.GetSlotSummaryAsync(i);
+
+            var summaries = await Task.WhenAll(tasks);
+
             for (int i = 0; i < _slotUIs.Length; i++)
             {
                 if (_slotUIs[i] == null) continue;
-                var summary = await svc.GetSlotSummaryAsync(i);
-                _slotUIs[i].Refresh(summary);
+                _slotUIs[i].Refresh(summaries[i]);
             }
         }