Reading frontend typoscript settings with BackendConfigurationManager in LanguageRedirectMiddleware

[bigahuna]

Describe the bug

• TYPO3 v12.4.14
• php 8.2
• locate

Leuchtfeuer\Locate\Middleware\LanguageRedirectMiddleware reads typoscript settings like this
$typoScript = $this->backendConfigurationManager->getTypoScriptSetup();

Reading typoscript frontend settings with the backendConfigurationManager results in unexpected behaviour with typoscript like this:

[traverse(page, "uid") in [968,967,202,965,969]]
    config.tx_locate = 0
[ELSE]
    config.tx_locate = 1
[GLOBAL]

The condition
if (isset($typoScript['config.']['tx_locate']) && (int)$typoScript['config.']['tx_locate'] === 1) {}
in LanguageRedirectMiddleware always returns true (config.tx_locate will always be 1), no matter what typoscript settings are configured. Maybe the reson is a changed behaviour in BackendConfigurationManager for TYPO3 v12. I did not dig deeper into this because there is a better, working solution:

If the typoscript setting will be read with the normal ConfigurationManager like this, it works just fine again:

/** @var ConfigurationManager $configurationManager */
$configurationManager = GeneralUtility::makeInstance(ConfigurationManager::class);
$typoScript = $configurationManager->getConfiguration(
ConfigurationManagerInterface::CONFIGURATION_TYPE_FULL_TYPOSCRIPT,
    'sitepackage'
);

As far as I see, the BackendConfigurationManager is not really supposed to read frontend typoscript code anyway. See comment at the start of the class:

/*
* Load TypoScript of a page in backend mode.
*
* Extbase Backend modules can be configured with Frontend TypoScript. This is of course a very
* bad thing, but it is how it is ^^ (we'll get rid of this at some point, promised!)
*/

To Reproduce
Steps to reproduce the behavior:
Try to read fronten typoscript settings with the BackendConfigurationManager in Leuchtfeuer\Locate\Middleware\LanguageRedirectMiddleware

I hope I did not miss anything an will create a pull request.

Regards and thanks for a great and usefull extension!!
Mike