What happened?

Description

When using craft\fieldlayoutelements\Template in the admin panel ID like to use {% import "_includes/forms" as forms %}, but because it's rendered in SITE mode the CP templates are not loaded.

It works when I change vendor/craftcms/cms/src/fieldlayoutelements/Template.php:103 to TEMPLATE_MODE_CP, but I guess that could cause other issues.

Maybe there is a better way to accomplish this? My end-goal is to use the elementSelectField helper.

Alternatively template mode could be added as a config option:

new Template([
    'template' => '_myplugin/test.twig',
    'templateMode' => View::TEMPLATE_MODE_CP,
]),

Steps to reproduce

Event::on(
    FieldLayout::class,
    FieldLayout::EVENT_CREATE_FORM,
    function (CreateFieldLayoutFormEvent $e) {
        if ($e->element instanceof Course) {
            $e->tabs[] = new FieldLayoutTab([
                'name' => Craft::t('app', 'Test'),
                'layout' => $e->sender,
                'elements' => [
                    new Template([
                        'template' => '_myplugin/test.twig',
                    ]),
                ],
            ]);
        }
    }
);

// test.twig
{% import "_includes/forms" as forms %}

Expected behavior

Should load the helpers.

Actual behavior

Unable to find the template “_includes/forms”

Craft CMS version

5.4.71

PHP version

8.2

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions