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/index.php

@@ -89,8 +89,8 @@ $mdb = new medoo( [
 
 $user = \S::get_session( 'user', true );
 
-\admin\Site::update();
-\admin\Site::special_actions();
+\admin\App::update();
+\admin\App::special_actions();
 
 $domain       = preg_replace( '/^www\./', '', $_SERVER['SERVER_NAME'] );
 $cookie_name  = 'admin_remember_' . str_replace( '.', '-', $domain );
@@ -102,7 +102,7 @@ if ( isset( $_COOKIE[$cookie_name] ) && !isset( $_SESSION['user'] ) )
   if ($payload !== false && strpos($payload, '.') !== false)
   {
     list($json, $sig) = explode('.', $payload, 2);
-    $expected_sig = hash_hmac('sha256', $json, \admin\Site::APP_SECRET_KEY);
+    $expected_sig = hash_hmac('sha256', $json, \admin\App::APP_SECRET_KEY);
 
     if (hash_equals($expected_sig, $sig))
     {
@@ -135,5 +135,5 @@ if ( isset( $_COOKIE[$cookie_name] ) && !isset( $_SESSION['user'] ) )
   ]);
 }
 
-echo \admin\view\Page::show();
+echo \admin\App::render();
 ?>