improve:计时器UI

Ink Canvas/Windows/MinimizedTimerWindow.xaml

@@ -5,7 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:Ink_Canvas"
         xmlns:ui="http://schemas.inkore.net/lib/ui/wpf/modern"
-        Topmost="True" Background="{DynamicResource SeewoTimerWindowBackground}"
+        Topmost="True" Background="Transparent"
         mc:Ignorable="d" WindowStyle="None" AllowsTransparency="True"
         WindowStartupLocation="Manual" Title="计时器" Height="200" Width="600"
         MouseLeftButtonDown="Window_MouseLeftButtonDown" MouseLeftButtonUp="Window_MouseLeftButtonUp"

Ink Canvas/Windows/MinimizedTimerWindow.xaml.cs

@@ -93,22 +93,6 @@ namespace Ink_Canvas
         {
             try
             {
-                // 应用主题设置
-                var mainWindow = Application.Current.MainWindow as MainWindow;
-                if (mainWindow != null)
-                {
-                    bool isLightTheme = IsLightTheme();
-                    if (isLightTheme)
-                    {
-                        // 应用浅色主题
-                        this.Background = new SolidColorBrush(Color.FromRgb(255, 255, 255));
-                    }
-                    else
-                    {
-                        // 应用深色主题
-                        this.Background = new SolidColorBrush(Color.FromRgb(30, 30, 30));
-                    }
-                }
             }
             catch (Exception ex)
             {