ver. 0.277: ShopProduct factory, Dashboard, Update migration, legacy cleanup, admin\App

- ShopProduct factory: full migration (~40 ProductRepository methods, ~30 controller actions)
- Dashboard: Domain+DI migration (DashboardRepository + DashboardController)
- Update: Domain+DI migration (UpdateRepository + UpdateController, template rewrite)
- Renamed admin\Site to admin\App, removed dead fallback routing
- Removed all legacy folders: admin/controls, admin/factory, admin/view
- Newsletter: switched from admin\factory\Articles to ArticleRepository
- 414 tests, 1335 assertions passing

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

admin/templates/shop-product/mass-edit-custom-script.php

@@ -68,8 +68,8 @@
         $.ajax({
           type: 'POST',
           cache: false,
-          url: '/admin/ajax.php',
-          data: { a: 'cookie_categories', category_id: category_id }
+          url: '/admin/shop_category/cookie_categories/',
+          data: { category_id: category_id }
         });
       }
     });