improve:计时器UI

Ink Canvas/MainWindow.xaml.cs

@@ -2459,6 +2459,7 @@ namespace Ink_Canvas
                     SideControlMinimumAutomationSlider,
                     RandWindowOnceCloseLatencySlider,
                     RandWindowOnceMaxStudentsSlider,
+                    TimerVolumeSlider,
                     BoardInkWidthSlider,
                     BoardInkAlphaSlider,
                     BoardHighlighterWidthSlider,

Ink Canvas/Windows/MinimizedTimerWindow.xaml

@@ -19,7 +19,7 @@
         </ResourceDictionary>
     </Window.Resources>
 
-    <Border Background="{DynamicResource SeewoTimerWindowBackground}" 
+    <Border x:Name="MainBorder" Background="{DynamicResource SeewoTimerWindowBackground}" 
             CornerRadius="15" 
             BorderThickness="1" 
             BorderBrush="{DynamicResource SeewoTimerWindowBorderBrush}" 

Ink Canvas/Windows/MinimizedTimerWindow.xaml.cs

@@ -93,6 +93,12 @@ namespace Ink_Canvas
         {
             try
             {
+
+                bool isLightTheme = IsLightTheme();
+                if (!isLightTheme)
+                {
+                    SetDarkThemeBorder();
+                }
             }
             catch (Exception ex)
             {
@@ -123,6 +129,23 @@ namespace Ink_Canvas
             return true;
         }
 
+        // 设置深色主题下的灰色边框
+        private void SetDarkThemeBorder()
+        {
+            try
+            {
+                // 找到Border元素并设置灰色边框
+                var border = this.FindName("MainBorder") as Border;
+                if (border != null)
+                {
+                    border.BorderBrush = new SolidColorBrush(Color.FromRgb(64, 64, 64));
+                }
+            }
+            catch
+            {
+            }
+        }
+
         private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
         {
             // 记录点击时间