A: 添加任务栏窗口界面 (TaskbarWindow.xaml) 以显示实时网络流量；新增工具类 TaskbarHelper 获取任务栏位置

A: README 更新，详述功能清单及说明
A: 添加图片资源(img.png, img_1.png, img_2.png, img_3.png)
D: 移除 MainWindow.xaml.cs 中无用引用

Shell/MainWindow.xaml.cs

@@ -1,14 +1,4 @@
-using System.Text;
-using System.Text.Json;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
+using System.Windows;
 
 namespace Shell;