优化代码 for #1834

src/Admin.php

@@ -540,14 +540,9 @@ class Admin
 
         $pjaxId = static::getPjaxContainerId();
 
-        $lang = __('admin.client') ?: [];
-        if (isset($jsVariables['lang'])) {
-            $lang = array_merge($lang, $jsVariables['lang']);
-        }
-
         $jsVariables['pjax_container_selector'] = $pjaxId ? ('#'.$pjaxId) : '';
         $jsVariables['token'] = csrf_token();
-        $jsVariables['lang'] = $lang;
+        $jsVariables['lang'] = ($lang = __('admin.client')) ? array_merge($lang, $jsVariables['lang'] ?? []) : [];
         $jsVariables['colors'] = static::color()->all();
         $jsVariables['dark_mode'] = static::isDarkMode();
         $jsVariables['sidebar_dark'] = config('admin.layout.sidebar_dark') || ($sidebarStyle === 'dark');