Standardize service errors with ProblemDetails envelope

Infrastructure/PlayerIdentityExtensions.cs

@@ -3,6 +3,7 @@ using GameList.Domain;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Diagnostics;
+using Microsoft.AspNetCore.Mvc;
 
 namespace GameList.Infrastructure;
 
@@ -44,7 +45,14 @@ public static class PlayerIdentityExtensions
 
                 context.Response.StatusCode = StatusCodes.Status500InternalServerError;
                 context.Response.ContentType = "application/json";
-                await context.Response.WriteAsJsonAsync(new { error = "Unexpected server error" });
+                var problem = new ProblemDetails
+                {
+                    Status = StatusCodes.Status500InternalServerError,
+                    Title = "Internal Server Error",
+                    Detail = "Unexpected server error"
+                };
+                problem.Extensions["error"] = "Unexpected server error";
+                await context.Response.WriteAsJsonAsync(problem);
             });
         });
         return app;