试试

LanMountainDesktop.Launcher/Views/SplashWindow.axaml

@@ -3,15 +3,38 @@
         x:Class="LanMountainDesktop.Launcher.Views.SplashWindow"
         Title="阑山桌面"
         Width="420"
-        Height="220"
+        Height="240"
         CanResize="False"
         WindowStartupLocation="CenterScreen"
         SystemDecorations="None">
-  <Grid Margin="24">
+  <Grid Margin="24" RowDefinitions="*,Auto,Auto,Auto">
     <TextBlock x:Name="AppNameText"
                Text="阑山桌面"
                FontSize="34"
                VerticalAlignment="Center"
-               HorizontalAlignment="Center" />
+               HorizontalAlignment="Center"
+               Grid.Row="0" />
+    <ProgressBar x:Name="ProgressIndicator"
+                 Grid.Row="1"
+                 Minimum="0"
+                 Maximum="100"
+                 Value="0"
+                 Height="4"
+                 Margin="0,12,0,0"
+                 IsIndeterminate="True" />
+    <TextBlock x:Name="StageText"
+               Grid.Row="2"
+               FontSize="12"
+               Foreground="#999999"
+               HorizontalAlignment="Center"
+               Margin="0,8,0,0"
+               Text="" />
+    <TextBlock x:Name="DetailText"
+               Grid.Row="3"
+               FontSize="11"
+               Foreground="#BBBBBB"
+               HorizontalAlignment="Center"
+               Margin="0,2,0,0"
+               Text="" />
   </Grid>
 </Window>

LanMountainDesktop.Launcher/Views/SplashWindow.axaml.cs

@@ -1,12 +1,48 @@
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
+using LanMountainDesktop.Launcher.Services;
 
 namespace LanMountainDesktop.Launcher.Views;
 
-internal partial class SplashWindow : Window
+internal partial class SplashWindow : Window, ISplashStageReporter
 {
+    private static readonly (string Stage, string Label, double Progress)[] StageMap =
+    [
+        ("bootstrap", "正在初始化...", 10),
+        ("silentUpdate", "正在应用更新...", 35),
+        ("pluginTasks", "正在处理插件...", 65),
+        ("launchHost", "正在启动...", 90),
+    ];
+
     public SplashWindow()
     {
         AvaloniaXamlLoader.Load(this);
     }
+
+    public void Report(string stage, string message)
+    {
+        var (label, progress) = ResolveStageInfo(stage);
+
+        var stageText = this.GetControl<TextBlock>("StageText");
+        var detailText = this.GetControl<TextBlock>("DetailText");
+        var progressIndicator = this.GetControl<ProgressBar>("ProgressIndicator");
+
+        stageText.Text = label;
+        detailText.Text = message;
+        progressIndicator.IsIndeterminate = false;
+        progressIndicator.Value = progress;
+    }
+
+    private static (string Label, double Progress) ResolveStageInfo(string stage)
+    {
+        foreach (var (s, label, progress) in StageMap)
+        {
+            if (string.Equals(s, stage, StringComparison.OrdinalIgnoreCase))
+            {
+                return (label, progress);
+            }
+        }
+
+        return (stage, 0);
+    }
 }