[BUGFIX] Use proper response file name paths

[kosimas]

The backend module is currently not functional and generates this error:

TYPO3Fluid\Fluid\View\Exception\InvalidTemplateResourceException

Tried resolving a template file for controller action "Default->Index" in format ".html", but none of the paths contained the expected template file (Default/Index.html). The following paths were checked: /var/www/html/vendor/typo3/cms-backend/Resources/Private/Templates/, /var/www/html/vendor/t3docs/blog-example/Resources/Private/Templates/ 

I tested the module in Typo3 13.4.

[froemken]

Hi @kosimas

Thank you very much for your patch and for your effort to improve blog_example. I really appreciate your contribution!

However, after reviewing the issue more closely, I believe the underlying problem is broader and shouldn't be addressed with a quick patch. Specifically, defining template paths in ext_typoscript_setup.typoscript is no longer supported, and having a Backend subfolder in all three folders (Templates, Partials, Layouts) isn't ideal either — especially since TYPO3 v12 introduced a much better way to override backend module template paths.

To address this properly, I’ve submitted a separate PR: #162 that aims to restructure the entire templating setup. That change still needs discussion and review before it can be merged, but I believe it's the more sustainable direction.

Thanks again for your help and understanding!

Stefan