improve:安全面板

Ink Canvas/Windows/SettingsViews/SettingsViews/SecurityPanel.xaml

@@ -66,7 +66,6 @@
                         </StackPanel>
                         <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Center" Margin="0,0,15,0">
                             <Button x:Name="BtnSetOrChangePassword" Width="120" Height="32" Click="BtnSetOrChangePassword_Click" Content="设置/修改密码"/>
-                            <Button x:Name="BtnDisablePassword" Width="90" Height="32" Margin="8,0,0,0" Click="BtnDisablePassword_Click" Content="关闭密码"/>
                         </StackPanel>
                     </Grid>
 

Ink Canvas/Windows/SettingsViews/SettingsViews/SecurityPanel.xaml.cs

@@ -43,7 +43,6 @@ namespace Ink_Canvas.Windows.SettingsViews
             var enabled = sec != null && sec.PasswordEnabled;
 
             if (BtnSetOrChangePassword != null) BtnSetOrChangePassword.IsEnabled = enabled;
-            if (BtnDisablePassword != null) BtnDisablePassword.IsEnabled = enabled;
 
             // 用途开关：仅在启用密码功能时可操作
             var usageEnabled = enabled;
@@ -155,21 +154,6 @@ namespace Ink_Canvas.Windows.SettingsViews
             }
         }
 
-        private void BtnDisablePassword_Click(object sender, RoutedEventArgs e)
-        {
-            // 触发和开关一致的逻辑
-            if (FindToggleSwitch("ToggleSwitchPasswordEnabled") is Border b)
-            {
-                // 模拟点击到 off
-                if (MainWindow.Settings?.Security?.PasswordEnabled == true)
-                {
-                    _isLoaded = true;
-                    SetToggleSwitchState(b, false);
-                    HandleToggleSwitchChange("PasswordEnabled", false);
-                }
-            }
-        }
-
         public event EventHandler<RoutedEventArgs> IsTopBarNeedShadowEffect;
         public event EventHandler<RoutedEventArgs> IsTopBarNeedNoShadowEffect;