ver. 0.286: Layouts, Menu, Pages frontend migration to Domain

- Add 6 frontend methods to LayoutsRepository (Redis cache, 3-level fallback)
- Add 6 frontend methods to PagesRepository (Redis cache, recursive pages)
- Create front\Views\Menu (clean VIEW replacing front\view\Menu)
- Delete front\factory\Layouts, Menu, Pages + front\view\Menu + dead submenu.php
- Fix null $lang_id TypeError in check_url_params() (remove string type hint + ?? '')
- Optimize Helpers::htacces() from 3 layout calls to 1
- Tests: 470 OK, 1484 assertions (+16 new)

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

updates/0.20/ver_0.286_files.txt

@@ -0,0 +1,5 @@
+F: ../autoload/front/factory/class.Layouts.php
+F: ../autoload/front/factory/class.Menu.php
+F: ../autoload/front/factory/class.Pages.php
+F: ../autoload/front/view/class.Menu.php
+F: ../templates/menu/submenu.php