onboard/app/Http/Middleware/HandleInertiaRequests.php

<?php

namespace App\Http\Middleware;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Session;
use Inertia\Middleware;

class HandleInertiaRequests extends Middleware
{
    /**
     * The root template that's loaded on the first page visit.
     *
     * @see https://inertiajs.com/server-side-setup#root-template
     *
     * @var string
     */
    protected $rootView = 'app';

    /**
     * Determines the current asset version.
     *
     * @see https://inertiajs.com/asset-versioning
     */
    public function version(Request $request): ?string
    {
        return parent::version($request);
    }

    /**
     * Define the props that are shared by default.
     *
     * @see https://inertiajs.com/shared-data
     *
     * @return array<string, mixed>
     */
    public function share(Request $request): array
    {
        $user = $request->user() ?? Auth::guard('sanctum')->user();
        return [
            ...parent::share($request),
            'user' => $user ? [
                'name' => $user->name,
                'token' => Session::get('token'),
                'permissions' => $user->permissions(),
                'role' => $user->currentRole(),
                'available_roles' => $user->roles,
                'available_departments' => $user->availableDepartments(),
                'current_department' => $user->department
            ] : null,
        ];
    }
}