complete story 1.3 with qa test & added future recommendations to the dev

app/Http/Middleware/EnsureUserIsAdmin.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureUserIsAdmin
+{
+    public function handle(Request $request, Closure $next): Response
+    {
+        if (! $request->user()?->isAdmin()) {
+            abort(403, __('messages.unauthorized'));
+        }
+
+        return $next($request);
+    }
+}