Move languages to site

[giuscris]

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[Copilot]

Pull Request Overview

This PR moves language configuration from the global system level to per‐site control, updates various services and controllers to use the new site‐level API, and migrates translation keys accordingly.

• Switch panel UI and routing to use Site::languages() instead of system config
• Introduce LanguagesFactory, Site::setLanguages(), and remove the old loader
• Migrate translation keys from panel.options.system.languages.* to panel.site.languages.*

Reviewed Changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
panel/views/pages/editor.php	Update dropdown display check to use site languages
panel/translations/*.yaml	Remove old panel.options.system.languages.* and add panel.site.languages.*
formwork/src/Services/Loaders/TranslationsServiceLoader.php	Remove unused Languages import and setter call
formwork/src/Panel/Controllers/PagesController.php	Use site languages availability and validation
formwork/src/Languages/LanguagesFactory.php	Create LanguagesFactory to build language instances
formwork/src/Languages/Languages.php	Add hasMultiple() method
formwork/src/Cms/Site.php	Inject LanguagesFactory, implement setLanguages()
formwork/src/Cms/App.php	Register LanguagesFactory, remove old LanguagesServiceLoader
formwork/routes.php	Update language route action to use Site::languages()
formwork/config/system.yaml	Remove deprecated languages block
formwork/config/site.yaml	Add new languages configuration block

Comments suppressed due to low confidence (4)

formwork/src/Languages/LanguagesFactory.php:18

• Docblock incorrectly marks default as bool; it should be a string code. Update the type to string|null or similar.

*     @param array{available: list<string>, httpPreferred: bool, default?: bool} $config

panel/views/pages/editor.php:33

• The method language() does not exist on Site; this should be languages()->hasMultiple().

<?php if ($site->language()->hasMultiple()) : ?>

formwork/routes.php:3

• Str is used later but not imported. Add use Formwork\Utils\Str; at the top of the file.

use Formwork\Cms\Site;

panel/translations/en.yaml:263

• Typo in translation: 'prefered' should be spelled 'preferred'.

panel.site.languages.preferredLanguage: Use browser prefered language