ver. 0.280: Articles frontend migration, class.Article removal, Settings facade cleanup

- Add 8 frontend methods to ArticleRepository (with Redis cache)
- Create front\Views\Articles (rendering + utility methods)
- Rewire front\view\Site::show() and front\controls\Site::route() to repo + Views
- Update 5 article templates to use \front\Views\Articles::
- Convert front\factory\Articles and front\view\Articles to facades
- Remove class.Article (entity + static methods migrated to repo + Views)
- Remove front\factory\Settings facade (already migrated)
- Fix: eliminate global $lang from articleNoindex(), inline page sort query
- Tests: 450 OK, 1431 assertions (+13 new)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

index.php

@@ -75,7 +75,7 @@ if ( !$lang = \S::get_session( 'lang-' . $lang_id ) )
   \S::set_session( 'lang-' . $lang_id, $lang );
 }
 
-$settings = \front\factory\Settings::settings_details();
+$settings = ( new \Domain\Settings\SettingsRepository( $mdb ) )->allSettings();
 $client = \S::get_session( 'client' );
 
 if ( \S::get( 'action' ) == 'htaccess' )