ver. 0.288: BasketCalculator + ShopBasketController migration, cms\Layout removal

- Migrate front\factory\ShopBasket → Domain\Basket\BasketCalculator (4 static methods, 18 callers updated)
- Migrate front\controls\ShopBasket → front\Controllers\ShopBasketController (camelCase, instance methods)
- Add snake_case→camelCase action dispatch for new controllers in Site::route()
- Update title()/page_title() to check front\Controllers\ before fallback
- Remove cms\Layout class (replaced by $layoutsRepo->find())
- Add 8 tests for BasketCalculator (484 tests, 1528 assertions)

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

docs/PROJECT_STRUCTURE.md

@@ -108,9 +108,9 @@ shopPRO/
 │   │   ├── Helpers/            # Helpers (ex class.S.php)
 │   │   └── Tpl/                # Tpl (silnik szablonow)
 │   ├── front/                  # Klasy frontendu
-│   │   ├── Controllers/        # Nowe kontrolery DI (Newsletter)
+│   │   ├── Controllers/        # Nowe kontrolery DI (Newsletter, ShopBasket)
 │   │   ├── Views/              # Nowe widoki (Newsletter, Articles, Languages, Banners, Menu, Scontainers)
-│   │   ├── controls/           # Kontrolery legacy (Site, ShopBasket, ...)
+│   │   ├── controls/           # Kontrolery legacy (Site, ...)
 │   │   ├── view/               # Widoki legacy (Site, ...)
 │   │   └── factory/            # Fabryki/helpery (fasady)
 │   └── shop/                   # Klasy sklepu