Try to do a better job of handling aspnet errors

Client/app/context/AuthContext.tsx

@@ -2,15 +2,30 @@ import { createContext, useContext, useEffect, useState } from "react";
 import { jwtDecode } from "jwt-decode";
 import { API } from "~/api/api";
 
-export function getApiErrorMessage(error: any): string {
-  if (error && Array.isArray(error.errors) && error.errors.length > 0) {
-    return error.errors.map((e: any) => e.description).join('\n');
+export const getApiErrorMessage = (error: any): string => {
+  if (error && error.errors && typeof error.errors === 'object') {
+    // Handles ASP.NET Core validation problem details
+    // e.g., {"errors":{"Email":["The Email field is required."]}}
+    const messages = Object.values(error.errors).flat();
+    if (messages.length > 0) {
+      return (messages as string[]).join(' ');
+    }
   }
-  if (error && error.detail) {
-    return error.detail;
+
+  if (error && error.title) {
+    return error.title;
   }
-  return "An unexpected error occurred.";
-}
+
+  if (error && error.message) {
+    return error.message;
+  }
+
+  if (typeof error === 'string') {
+    return error;
+  }
+  
+  return 'An unexpected error occurred.';
+};
 
 export interface User {
   id: string;