Migrate backend to Porto architecture and fix minor bugs

- Fully transitioned the backend to the Porto architectural pattern
- Improved code organization and maintainability
- Fixed minor bugs and inconsistencies

app/Ship/Middleware/EnsureUserIsSuperadmin.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Ship\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Inertia\Inertia;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureUserIsSuperadmin
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next)
+    {
+        if (!Auth::check() || !Auth::user()->hasRole('super_admin')) {
+            return Inertia::render('Error', ['status' => 403])
+                ->toResponse($request)
+                ->setStatusCode(403);
+        }
+
+        return $next($request);
+    }
+}