fix: missing font (#332)

## Branch
- [x] I branched off beta (not master) to develop this feature/fix

## Description

Cannot run without the font missing.
```
Unhandled exception. System.InvalidOperationException: Default font family name can't be null or empty.
   at Avalonia.Media.FontManager.GetDefaultFontFamilyName(FontManagerOptions options)
   at Avalonia.Media.FontManager..ctor(IFontManagerImpl platformImpl)
   at Avalonia.Media.FontManager.get_Current()
   at Avalonia.AppBuilder.<>c__DisplayClass71_0.<ConfigureFonts>b__0(AppBuilder appBuilder)
   at Avalonia.AppBuilder.SetupUnsafe()
   at Avalonia.AppBuilder.Setup()
   at Avalonia.AppBuilder.SetupWithLifetime(IApplicationLifetime lifetime)
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime(AppBuilder builder, String[] args, Action`1 lifetimeBuilder)
   at Jellyfin2Samsung.Program.Main(String[] args) in Samsung-Jellyfin-Installer/Jellyfin2Samsung-CrossOS/Program.cs:line 25
```

## Fixes
Adds missing packages to the nix shell.

---

## Type of Change

- [x] Bug fix (non-breaking change)
- [ ] New feature (non-breaking change)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [ ] Other (please describe):

---

## Checklist

- [x] My code follows the existing project structure and style  
- [x] I have tested my changes manually  
- [x] I have added necessary documentation (if applicable)  
- [x] I have verified that the installer still works with the underlying
CLI

Jellyfin2Samsung-CrossOS/Helpers/AppSettings.cs

@@ -85,7 +85,7 @@ namespace Jellyfin2Samsung.Helpers
         // ----- Application-scoped settings (readonly at runtime) -----
         public string ReleasesUrl { get; set; } = "https://api.github.com/repos/jeppevinkel/jellyfin-tizen-builds/releases";
         public string AuthorEndpoint { get; set; } = "https://dev.tizen.samsung.com/apis/v2/authors";
-        public string AppVersion { get; set; } = "v2.2.0.8";
+        public string AppVersion { get; set; } = "v2.2.0.9";
         public string TizenSdb { get; set; } = "https://api.github.com/repos/PatrickSt1991/tizen-sdb/releases";
         public string JellyfinAvRelease { get; set; } = "https://api.github.com/repos/PatrickSt1991/tizen-jellyfin-avplay/releases";
         public string JellyfinAvReleaseFork { get; set; } = "https://api.github.com/repos/asamahy/tizen-jellyfin-avplay/releases";

Jellyfin2Samsung-CrossOS/Helpers/Core/GitHubAuthHandler.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Net;
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Threading;
@@ -17,7 +18,7 @@ namespace Jellyfin2Samsung.Helpers.Core
             _token = token;
         }
 
-        protected override Task<HttpResponseMessage> SendAsync(
+        protected override async Task<HttpResponseMessage> SendAsync(
             HttpRequestMessage request,
             CancellationToken cancellationToken)
         {
@@ -26,7 +27,23 @@ namespace Jellyfin2Samsung.Helpers.Core
                 request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", _token);
             }
 
-            return base.SendAsync(request, cancellationToken);
+            var response = await base.SendAsync(request, cancellationToken);
+
+            // Token is expired or revoked — retry unauthenticated for public endpoints
+            if (response.StatusCode == HttpStatusCode.Unauthorized &&
+                request.Headers.Authorization != null)
+            {
+                Trace.TraceWarning("[GitHubAuth] Token rejected (401) — retrying without authorization");
+                var retry = new HttpRequestMessage(request.Method, request.RequestUri);
+                foreach (var header in request.Headers)
+                {
+                    if (!string.Equals(header.Key, "Authorization", StringComparison.OrdinalIgnoreCase))
+                        retry.Headers.TryAddWithoutValidation(header.Key, header.Value);
+                }
+                response = await base.SendAsync(retry, cancellationToken);
+            }
+
+            return response;
         }
 
         private static bool IsGitHubRequest(Uri? uri)

README.md

@@ -31,8 +31,8 @@
 
 | Channel    | Version                                                             | Notes                        |
 |------------|---------------------------------------------------------------------|------------------------------|
-| **Stable** | [v2.2.0.7](https://github.com/Jellyfin2Samsung/Samsung-Jellyfin-Installer/releases/tag/v2.2.0.7)                                        | Recommended for most users   |
-| **Beta**   | [v2.2.0.8-beta](https://github.com/Jellyfin2Samsung/Samsung-Jellyfin-Installer/releases/tag/v2.2.0.8-beta)                                            | Includes new features        |
+| **Stable** | [v2.2.0.8](https://github.com/Jellyfin2Samsung/Samsung-Jellyfin-Installer/releases/tag/v2.2.0.8)                                        | Recommended for most users   |
+| **Beta**   | [v2.2.0.9-beta](https://github.com/Jellyfin2Samsung/Samsung-Jellyfin-Installer/releases/tag/v2.2.0.9-beta)                                            | Includes new features        |
 
 <!-- versions:end -->
 

shell.nix

@@ -28,6 +28,8 @@ let
       fontconfig
       freetype
       libGL
+      dejavu_fonts
+      freefont_ttf
 
       # X11 tools 
       xorg.libX11