Optimize product retrieval by department categories and improve filtering in productsRoute

- Refactored `getAllProductInDepartmentCategories` in `departments_o` using `array_reduce` for cleaner and more efficient category loop.
- Enhanced `productsRoute` to filter department-specific products using IDs for stricter matching.

services/nginx/app/objects/departments_o.php

@@ -382,26 +382,21 @@ class departments_o extends db
     }
 
     /**
-     * @throws Exception
      * @return products_o[] An array of all products in the department's categories
+     * @throws Exception
      */
     public function getAllProductInDepartmentCategories(): array
     {
         self::requireSelected();
+
         // Get all the categories associated
         $department_categories = (new department_categories_o())->getDepartmentCategoryObjects($this->id);
-        $categories = [];
-        /** @var products_o[] $products */
-        $products = [];
-        foreach ( $department_categories as $department_category ) {
-            $categories[] = $department_category->getCategory();
-        }
-        foreach ( $categories as $category ) {
-            $cat_products = $category->getProducts();
-            foreach ($cat_products as $cat_product) {
-                $products[] = $cat_product;
-            }
-        }
+
+        // Use array_reduce to combine both loops into a single operation
+        $products = array_reduce($department_categories, function ($products, $department_category) {
+            return array_merge($products, $department_category->getCategory()->getProducts());
+        }, []);
+
         // Remove duplicate products
         return array_unique($products, SORT_REGULAR);
     }