- add: DotNet runtime download

Nebula.Launcher/LauncherConVar.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using Nebula.Launcher.Models;
 using Nebula.Launcher.ViewModels.Pages;
 using Nebula.Shared.Services;
@@ -32,4 +33,6 @@ public static class LauncherConVar
     public static readonly ConVar<string> CurrentLang = ConVarBuilder.Build<string>("launcher.language", "en-US");
     public static readonly ConVar<string> ILSpyUrl = ConVarBuilder.Build<string>("decompiler.url",
     "https://github.com/icsharpcode/ILSpy/releases/download/v9.0/ILSpy_binaries_9.0.0.7889-x64.zip");
+    
+    
 }

Nebula.Launcher/ViewModels/Pages/ContentBrowserViewModel.cs

@@ -39,6 +39,11 @@ public sealed partial class ContentBrowserViewModel : ViewModelBase, IContentHol
 
     public void OnBackEnter()
     {
+        if (CurrentEntry.Parent is null)
+        {
+            SetHubRoot();
+            return;
+        }
         CurrentEntry.Parent?.GoCurrent();
     }
 
@@ -116,6 +121,8 @@ public sealed partial class ContentBrowserViewModel : ViewModelBase, IContentHol
 
     public void SetHubRoot()
     {
+        ServerText = string.Empty;
+        SearchText = string.Empty;
         var root = ViewHelperService.GetViewModel<ServerListContentEntry>();
         root.InitHubList(this);
         CurrentEntry = root;

Nebula.Launcher/ViewModels/ServerEntryModelView.cs

@@ -55,6 +55,7 @@ public partial class ServerEntryModelView : ViewModelBase, IFilterConsumer
     [GenerateProperty] private RestService RestService { get; } = default!;
     [GenerateProperty] private MainViewModel MainViewModel { get; } = default!;
     [GenerateProperty] private FavoriteServerListProvider FavoriteServerListProvider { get; } = default!;
+    [GenerateProperty] private DotnetResolverService DotnetResolverService { get; } = default!;
 
     public ServerStatus Status { get; private set; } =
         new(
@@ -210,10 +211,10 @@ public partial class ServerEntryModelView : ViewModelBase, IFilterConsumer
                 await RunnerService.PrepareRun(buildInfo, loadingContext, CancellationService.Token);
 
                 var path = Path.GetDirectoryName(Assembly.GetEntryAssembly()?.Location);
-
+                
                 Process = Process.Start(new ProcessStartInfo
                 {
-                    FileName = "dotnet.exe",
+                    FileName = await DotnetResolverService.EnsureDotnet(),
                     Arguments = Path.Join(path, "Nebula.Runner.dll"),
                     Environment =
                     {