chore(Application.php): conditionally load files search script in sim…

[tanyaka]

Fix context menu language not depending on Setting > Language

The simplesettings app was loading files/search script on every page load (due to being globally enabled), which interfered with language detection causing browser language to override user configured language.

Run test via:

../d-n-t/container/dev bash -c "cd apps-custom/simplesettings/ && phpunit -c tests/phpunit.xml --colors=always --fail-on-warning --fail-on-risky"

[Copilot]

Pull Request Overview

This PR fixes a language detection issue in the simplesettings app where the files search script was being loaded globally, causing browser language to override user-configured language settings.

• Moved files search script loading from global Application constructor to specific page controller
• Added test isolation utilities to reset script and style state between tests
• Added test to verify files search script injection behavior

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
lib/AppInfo/Application.php	Removed global files search script loading from constructor
lib/Controller/PageController.php	Added conditional files search script loading in index method
tests/Controller/PageControllerTest.php	Added test isolation utilities and test for script injection behavior

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[printminion-co]

review ok
if changes accepted.

lets ensure that script addition happens in proper context

inspired by https://github.com/IONOS-Productivity/nc-server/blob/e68ddae1e3c1e4532043f07bbc1bd9d1c96aa8a1/apps/files/lib/Controller/ViewController.php#L188