improve:PPT及自动更新

Ink Canvas/MainWindow_cs/MW_PPT.cs

@@ -585,6 +585,9 @@ namespace Ink_Canvas
                     {
                         LogHelper.WriteLogToFile("PPT放映状态变化：退出放映模式", LogHelper.LogType.Trace);
                     }
+
+                    // 检查主窗口可见性（用于仅PPT模式）
+                    CheckMainWindowVisibility();
                 });
             }
             catch (Exception ex)

Ink Canvas/MainWindow_cs/MW_SettingsToLoad.cs

@@ -786,6 +786,17 @@ namespace Ink_Canvas
                 ToggleSwitchDirectCallCiRand.IsOn = Settings.RandSettings.DirectCallCiRand;
             }
 
+            // ModeSettings
+            if (Settings.ModeSettings != null)
+            {
+                ToggleSwitchMode.IsOn = Settings.ModeSettings.IsPPTOnlyMode;
+            }
+            else
+            {
+                Settings.ModeSettings = new ModeSettings();
+                ToggleSwitchMode.IsOn = false;
+            }
+
             // Automation
             if (Settings.Automation != null)
             {