Add isHidden to Category, category CRUD tests, coverage improvements

- Add isHidden field to Category entity with migration (DEFAULT false for existing rows)
- Add isHidden checkbox to edit category template and "Masquee" badge on category list
- Save isHidden in editCategory controller method
- Fix Category.isActive() indentation
- Create CategoryTest with full coverage (14 tests): defaults, setters, setEvent logic, isActive, isHidden
- Add category CRUD tests to AccountControllerTest: add/edit/delete/reorder categories with access control
- Add cookie-consent tests for dev env early return and Cloudflare tunnel script
- Exclude PayoutPdfService from phpunit coverage and SonarQube analysis

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Controller/AccountController.php

@@ -462,6 +462,8 @@ class AccountController extends AbstractController
                 $category->setEndAt($category->getStartAt()->modify('+30 days'));
             }
 
+            $category->setIsHidden($request->request->getBoolean('is_hidden'));
+
             $em->flush();
 
             $this->addFlash('success', 'Categorie modifiee.');