ver. 0.293: Code review fixes — 6 repositories, 16 fixes

- ArticleRepository: SQL injection fix (addslashes→parameterized), DRY refactor topArticles/newsListArticles
- AttributeRepository: dead class_exists('\S') blocking cache/temp clear
- CategoryRepository: dead class_exists('\S') blocking SEO link generation (critical)
- BannerRepository: parameterize $today in SQL + null guard on query()
- BasketCalculator: null guard checkProductQuantityInStock + optional DI params
- PromotionRepository: null guard on $basket (production fatal)
- OrderRepository/ShopBasketController/ajax.php: explicit DI in BasketCalculator callers

614 tests, 1821 assertions (+4 new)

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

autoload/Domain/Category/CategoryRepository.php

@@ -668,18 +668,12 @@ class CategoryRepository
 
     private function refreshCategoryArtifacts(): void
     {
-        if (class_exists('\\S')) {
-            \Shared\Helpers\Helpers::htacces();
-            \Shared\Helpers\Helpers::delete_dir('../temp/');
-        }
+        \Shared\Helpers\Helpers::htacces();
+        \Shared\Helpers\Helpers::delete_dir('../temp/');
     }
 
     private function normalizeSeoLink($value): ?string
     {
-        if (!class_exists('\\S')) {
-            return $this->toNullableString($value);
-        }
-
         $seo = \Shared\Helpers\Helpers::seo((string)$value);
         $seo = trim((string)$seo);