big restructure

pages/admin/users/theme().php

@@ -3,7 +3,7 @@
 use MintyPHP\Http\Request;
 use MintyPHP\Router;
 use MintyPHP\Session;
-use MintyPHP\Service\UserService;
+use MintyPHP\Service\User\UserService;
 use MintyPHP\Support\Guard;
 
 Guard::requireLogin();
@@ -34,8 +34,9 @@ if ($userId <= 0) {
     return;
 }
 
-$theme = trim((string) ($_POST['theme'] ?? ''));
-if (!in_array($theme, ['light', 'dark'], true)) {
+$theme = strtolower(trim((string) ($_POST['theme'] ?? '')));
+$themes = appThemes();
+if ($theme === '' || !isset($themes[$theme])) {
     http_response_code(400);
     if (Request::wantsJson()) {
         Router::json(['ok' => false, 'error' => 'invalid_theme']);