<?php
// 3. kernel/Kernel.php – routeur 5 lignes, sécurisé
namespace Kernel;
class Kernel {
    public function handle(string $uri): void {
        $uri = strtok($uri, '?');
        $map = ['/' => 'Home@index', '/clients' => 'CRM\ClientController@list'];
        [$ctrl, $act] = explode('@', $map[$uri] ?? 'Home@notFound');
        $class = "Controllers\\$ctrl";
        (new $class)->$act();
    }
}