feat: intro page.

demo/Ursa.Demo/ViewModels/IntroductionDemoViewModel.cs

@@ -0,0 +1,44 @@
+using System.Collections.ObjectModel;
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace Ursa.Demo.ViewModels;
+
+public class IntroductionDemoViewModel: ObservableObject
+{
+    public string Greeting => "hello Intro";
+    public ObservableCollection<MenuItemViewModel> MenuItems { get; set; } = new()
+    {
+        new MenuItemViewModel()
+        {
+            MenuHeader = "任务管理",
+            MenuIconName = "User",
+            Children = new ObservableCollection<MenuItemViewModel>()
+            {
+                new (){
+                    MenuHeader = "公告管理" , 
+                    MenuIconName = "Star",
+                    Children = new ObservableCollection<MenuItemViewModel>()
+                    {
+                        new () {MenuHeader = "公告设置"},
+                        new () {MenuHeader = "公告处理"}
+                    }},
+                new (){MenuHeader = "任务查询"}
+            }
+        },
+        new MenuItemViewModel()
+        {
+            MenuHeader = "附加功能",
+            IsSeparator = true,
+        },
+        new MenuItemViewModel()
+        {
+            MenuHeader = "任务平台",
+            MenuIconName = "Gear",
+            Children = new ObservableCollection<MenuItemViewModel>()
+            {
+                new (){MenuHeader = "任务管理"},
+                new (){MenuHeader = "用户任务查询"}
+            }
+        }
+    };
+}

demo/Ursa.Demo/ViewModels/MainViewViewModel.cs

@@ -24,6 +24,7 @@ public class MainViewViewModel : ViewModelBase
     {
         Content = s switch
         {
+            MenuKeys.MenuKeyIntroduction => new IntroductionDemoViewModel(),
             MenuKeys.MenuKeyBadge => new BadgeDemoViewModel(),
             MenuKeys.MenuKeyBanner => new BannerDemoViewModel(),
             MenuKeys.MenuKeyButtonGroup => new ButtonGroupDemoViewModel(),

demo/Ursa.Demo/ViewModels/MenuViewModel.cs

@@ -10,6 +10,7 @@ public class MenuViewModel: ViewModelBase
     {
         MenuItems = new ObservableCollection<MenuItemViewModel>()
         {
+            new() { MenuHeader = "Introduction", Key = MenuKeys.MenuKeyIntroduction, IsSeparator = false },
             new() { MenuHeader = "Controls", IsSeparator = true },
             new() { MenuHeader = "Badge", Key = MenuKeys.MenuKeyBadge },
             new() { MenuHeader = "Banner", Key = MenuKeys.MenuKeyBanner },