Implemented handling of server side issues using the rfc for problem detasils in the frontend

Moonlight.Frontend/Helpers/ProblemDetailsHelper.cs

@@ -0,0 +1,30 @@
+using System.Net.Http.Json;
+using Microsoft.AspNetCore.Components.Forms;
+using Moonlight.Shared.Http.Responses;
+
+namespace Moonlight.Frontend.Helpers;
+
+public static class ProblemDetailsHelper
+{
+    public static async Task HandleProblemDetailsAsync(HttpResponseMessage response, object model, ValidationMessageStore validationMessageStore)
+    {
+        var problemDetails = await response.Content.ReadFromJsonAsync<ProblemDetails>();
+
+        if (problemDetails == null)
+            response.EnsureSuccessStatusCode(); // Trigger exception when unable to parse
+        else
+        {
+            if(!string.IsNullOrEmpty(problemDetails.Detail))
+                validationMessageStore.Add(new FieldIdentifier(model, string.Empty), problemDetails.Detail);
+
+            if (problemDetails.Errors != null)
+            {
+                foreach (var error in problemDetails.Errors)
+                {
+                    foreach (var message in error.Value)
+                        validationMessageStore.Add(new FieldIdentifier(model, error.Key), message);
+                }
+            }
+        }
+    }
+}