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/front/Controllers/ShopBasketController.php

@@ -116,6 +116,7 @@ class ShopBasketController
 
   public function basketAddProduct()
   {
+    global $lang_id;
     $basket = \Domain\Basket\BasketCalculator::validateBasket( \Shared\Helpers\Helpers::get_session( 'basket' ) );
     $values_tmp = json_decode( \Shared\Helpers\Helpers::get( 'values' ), true );
     $values = [];