Added authenication/authorization. Refactored api startup.

JSMR.UI.Blazor/Services/JwtAuthorizationMessageHandler.cs

@@ -0,0 +1,21 @@
+using System.Net.Http.Headers;
+
+namespace JSMR.UI.Blazor.Services;
+
+public sealed class JwtAuthorizationMessageHandler(TokenStore tokens) : DelegatingHandler
+{
+    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken ct)
+    {
+        if (!string.IsNullOrWhiteSpace(tokens.AccessToken))
+        {
+            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", tokens.AccessToken);
+        }
+
+        return base.SendAsync(request, ct);
+    }
+}
+
+public sealed class TokenStore
+{
+    public string? AccessToken { get; set; }
+}