added auth with a simple UI

api/OED.Api/Infrastructure/Esi/EsiAuthHandler.cs

@@ -0,0 +1,36 @@
+using System.Net.Http.Headers;
+using OED.Api.Core.Interfaces.Services;
+
+namespace OED.Api.Infrastructure.Esi;
+
+public class EsiAuthHandler(
+    ITokenStore tokenStore,
+    IEsiTokenRefreshService refreshService,
+    IHttpContextAccessor httpContextAccessor
+) : DelegatingHandler
+{
+    protected override async Task<HttpResponseMessage> SendAsync(
+        HttpRequestMessage request,
+        CancellationToken cancellationToken)
+    {
+        var characterId = GetCharacterIdFromSession();
+        if (characterId is null)
+            return await base.SendAsync(request, cancellationToken);
+
+        var accessToken = await tokenStore.GetAccessTokenAsync(characterId.Value);
+
+        if (accessToken is null)
+            accessToken = await refreshService.RefreshAsync(characterId.Value);
+
+        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
+
+        return await base.SendAsync(request, cancellationToken);
+    }
+
+    private long? GetCharacterIdFromSession()
+    {
+        var context = httpContextAccessor.HttpContext;
+        // CharacterId is set on the HttpContext by session middleware
+        return context?.Items["CharacterId"] as long?;
+    }
+}