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>

docs/PROJECT_STRUCTURE.md

@@ -101,7 +101,11 @@ shopPRO/
 │   │   └── factory/            # Fabryki/helpery
 │   ├── Domain/                 # Repozytoria/logika domenowa
 │   ├── front/                  # Klasy frontendu
-│   │   └── factory/            # Fabryki/helpery
+│   │   ├── Controllers/        # Nowe kontrolery DI (Newsletter)
+│   │   ├── Views/              # Nowe widoki (Newsletter, Articles, Languages)
+│   │   ├── controls/           # Kontrolery legacy (Site, ShopBasket, ...)
+│   │   ├── view/               # Widoki legacy (Site, ...)
+│   │   └── factory/            # Fabryki/helpery (fasady)
 │   └── shop/                   # Klasy sklepu
 ├── docs/                       # Dokumentacja techniczna
 ├── libraries/                  # Biblioteki zewnętrzne