ver. 0.294: Code review complete — 96/96 classes, 27 fixes across all layers

Full codebase review of autoload/ directory (96 classes, ~1144 methods).
Fixes: null safety (query/find guards), redundant DI bypass, undefined
variables, missing globals, and Imagick WebP mime type bug in Helpers.

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

autoload/Domain/Category/CategoryRepository.php

@@ -769,31 +769,4 @@ class CategoryRepository
         return is_array($result) ? $result : [];
     }
 
-    public function subcategoriesLangCached(int $categoryId): array
-    {
-        $cacheHandler = new \Shared\Cache\CacheHandler();
-        $cacheKey = "subcategories_lang:{$categoryId}";
-        $cached = $cacheHandler->get($cacheKey);
-
-        if ($cached) {
-            return unserialize($cached);
-        }
-
-        $categories = $this->db->select('pp_shop_categories', '*', ['parent_id' => $categoryId]);
-        if (!is_array($categories)) {
-            return [];
-        }
-
-        $result = [];
-        foreach ($categories as $cat) {
-            $lang = $this->db->get('pp_shop_categories_langs', '*', ['category_id' => $cat['id']]);
-            if (is_array($lang)) {
-                $result[] = $lang;
-            }
-        }
-
-        $cacheHandler->set($cacheKey, $result);
-
-        return $result;
-    }
 }