助手函数helpers.php 中locale方法在设置 $locale时应该是无返回的

/**
* Locale
* @param string|null $locale
* @return void
*/
function locale(string $locale = null)
{
if (!$locale) {
return Translation::getLocale();
}
Translation::setLocale($locale);
}

The issue points to helpers.php and the locale() helper; inspect its current getter and setter behavior first, along with any related tests or call sites. Confirm the setter path has no return value while the getter still returns the current locale, and verify the expected behavior with the relevant test suite.

Written by the indexing model from the issue text.