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>

templates/shop-basket/basket-mini.php

@@ -7,7 +7,7 @@
     <div class="basket-details">
       <div class="title">Twój koszyk</div>
       <div class="details">
-        <b><?= ucfirst( $lang['ilosc'] );?></b>: <span id="products-count"><?= $count = \front\factory\ShopBasket::count_products( $this -> basket );?>
+        <b><?= ucfirst( $lang['ilosc'] );?></b>: <span id="products-count"><?= $count = \Domain\Basket\BasketCalculator::countProducts( $this -> basket );?>
         <?
           switch ( true )
           {
@@ -17,7 +17,7 @@
             case ( $count >= 5 ): echo 'produktów'; break;
           }
         ?></span><br />
-        <b><?= ucfirst( $lang['suma'] );?></b>: <span id="basket-value"><?= \Shared\Helpers\Helpers::decimal( \front\factory\ShopBasket::summary_price( $this -> basket, $this -> coupon ) );?></span> zł
+        <b><?= ucfirst( $lang['suma'] );?></b>: <span id="basket-value"><?= \Shared\Helpers\Helpers::decimal( \Domain\Basket\BasketCalculator::summaryPrice( $this -> basket, $this -> coupon ) );?></span> zł
       </div>
     </div>
   </a>