Recreated solution with web app template. Improved theme. Switched to ShadcnBlazor library

Moonlight.Frontend/Startup/IAppStartup.cs

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+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+
+namespace Moonlight.Frontend.Startup;
+
+public interface IAppStartup
+{
+    public void PreBuild(WebAssemblyHostBuilder builder);
+    public void PostBuild(WebAssemblyHost application);
+}

Moonlight.Frontend/Startup/Startup.Auth.cs

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+using Microsoft.AspNetCore.Components.Authorization;
+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+using Microsoft.Extensions.DependencyInjection;
+using Moonlight.Frontend.Services;
+
+namespace Moonlight.Frontend.Startup;
+
+public partial class Startup
+{
+    public void AddAuth(WebAssemblyHostBuilder builder)
+    {
+        builder.Services.AddScoped<AuthenticationStateProvider, RemoteAuthProvider>();
+        builder.Services.AddAuthorizationCore();
+        builder.Services.AddCascadingAuthenticationState();
+    }
+}

Moonlight.Frontend/Startup/Startup.Base.cs

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+using Microsoft.AspNetCore.Components.Web;
+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+using Microsoft.Extensions.DependencyInjection;
+using Moonlight.Frontend.UI;
+using ShadcnBlazor;
+using ShadcnBlazor.Extras;
+
+namespace Moonlight.Frontend.Startup;
+
+public partial class Startup
+{
+    public void AddBase(WebAssemblyHostBuilder builder)
+    {
+        builder.RootComponents.Add<App>("#app");
+        builder.RootComponents.Add<HeadOutlet>("head::after");
+
+        builder.Services.AddScoped(_ => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
+
+        builder.Services.AddShadcnBlazor();
+        builder.Services.AddShadcnBlazorExtras();
+    }
+}

Moonlight.Frontend/Startup/Startup.cs

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+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+
+namespace Moonlight.Frontend.Startup;
+
+public partial class Startup : IAppStartup
+{
+    public void PreBuild(WebAssemblyHostBuilder builder)
+    {
+        AddBase(builder);
+        AddAuth(builder);
+    }
+
+    public void PostBuild(WebAssemblyHost application)
+    {
+        
+    }
+}