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>

libraries/grid/config.php

@@ -16,7 +16,6 @@ require_once dirname( __FILE__ ) . '/../../autoload/class.S.php';
 $legacyFactoryFiles = [
   '/../../autoload/admin/factory/class.Articles.php',
   '/../../autoload/admin/factory/class.Pages.php',
-  '/../../autoload/admin/factory/class.ShopProduct.php',
 ];
 
 foreach ( $legacyFactoryFiles as $legacyFactoryFile )