improve:PPT自动播放及记忆上次播放页码

改进弹窗出现时机

Ink Canvas/MainWindow_cs/MW_PPT.cs

@@ -524,6 +524,8 @@ namespace Ink_Canvas
         {
             try
             {
+                bool isInSlideShowWhenOpened = _pptManager?.IsInSlideShow == true;
+
                 Application.Current.Dispatcher.InvokeAsync(() =>
                 {
                     // 在初始化墨迹管理器之前，先清理画布上的所有墨迹
@@ -546,8 +548,7 @@ namespace Ink_Canvas
                         CheckAndNotifyHiddenSlides(pres);
                     }
 
-                    // 检查自动播放设置
-                    if (Settings.PowerPointSettings.IsNotifyAutoPlayPresentation)
+                    if (Settings.PowerPointSettings.IsNotifyAutoPlayPresentation && !isInSlideShowWhenOpened)
                     {
                         CheckAndNotifyAutoPlaySettings(pres);
                     }
@@ -1021,10 +1022,13 @@ namespace Ink_Canvas
                     _pptManager?.TryNavigateToSlide(1);
                 }
                 else if (Settings.PowerPointSettings.IsNotifyPreviousPage)
+                {
+                    if (_pptManager?.IsInSlideShow != true)
                     {
                         ShowPreviousPageNotification(pres);
                     }
                 }
+            }
             catch (Exception ex)
             {
                 LogHelper.WriteLogToFile($"处理演示文稿导航失败: {ex}", LogHelper.LogType.Error);
@@ -1134,7 +1138,7 @@ namespace Ink_Canvas
         {
             try
             {
-                if (BtnPPTSlideShowEnd.Visibility == Visibility.Visible) return;
+                if (_pptManager?.IsInSlideShow == true) return;
 
                 bool hasSlideTimings = false;
                 if (pres?.Slides != null)