fix(notifications) : pagination réelle côté provider pour ne plus tronquer à 30 (LST-52)

NotificationProvider retournait findBy(..., 30) : limite codée en dur,
paramètre page ignoré et tableau brut (pas un Paginator). hydra:totalItems
valait donc 30 → fetchAllHydra s'arrêtait à la 1re page et les notifications
restaient tronquées à 30 malgré le correctif front.

- NotificationProvider : vraie pagination Doctrine (Pagination + DoctrinePaginator
  + TraversablePaginator), totalItems réel et hydra:view.next exposés
- NotificationRepository : createUserNotificationsQueryBuilder (filtre user + tri)
- fetchAllHydra : ne retronque plus silencieusement quand hydra:totalItems est
  absent, pagine jusqu'à une page non pleine

src/Repository/NotificationRepository.php

@@ -7,7 +7,9 @@ namespace App\Repository;
 use App\Entity\Notification;
 use App\Entity\User;
 use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\ORM\QueryBuilder;
 use Doctrine\Persistence\ManagerRegistry;
+use Symfony\Component\Security\Core\User\UserInterface;
 
 /**
  * @extends ServiceEntityRepository<Notification>
@@ -19,6 +21,15 @@ class NotificationRepository extends ServiceEntityRepository
         parent::__construct($registry, Notification::class);
     }
 
+    public function createUserNotificationsQueryBuilder(UserInterface $user): QueryBuilder
+    {
+        return $this->createQueryBuilder('n')
+            ->where('n.user = :user')
+            ->setParameter('user', $user)
+            ->orderBy('n.createdAt', 'DESC')
+        ;
+    }
+
     public function countUnreadByUser(User $user): int
     {
         return (int) $this->createQueryBuilder('n')

src/State/NotificationProvider.php

@@ -5,11 +5,17 @@ declare(strict_types=1);
 namespace App\State;
 
 use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\Pagination\Pagination;
+use ApiPlatform\State\Pagination\TraversablePaginator;
 use ApiPlatform\State\ProviderInterface;
 use App\Entity\Notification;
 use App\Repository\NotificationRepository;
+use ArrayIterator;
+use Doctrine\ORM\Tools\Pagination\Paginator as DoctrinePaginator;
 use Symfony\Bundle\SecurityBundle\Security;
 
+use function count;
+
 /**
  * @implements ProviderInterface<Notification>
  */
@@ -18,16 +24,28 @@ final readonly class NotificationProvider implements ProviderInterface
     public function __construct(
         private Security $security,
         private NotificationRepository $notificationRepository,
+        private Pagination $pagination,
     ) {}
 
-    public function provide(Operation $operation, array $uriVariables = [], array $context = []): array|object
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): object
     {
         $user = $this->security->getUser();
 
-        return $this->notificationRepository->findBy(
-            ['user' => $user],
-            ['createdAt' => 'DESC'],
-            30,
+        [$page, $offset, $limit] = $this->pagination->getPagination($operation, $context);
+
+        $queryBuilder = $this->notificationRepository
+            ->createUserNotificationsQueryBuilder($user)
+            ->setFirstResult($offset)
+            ->setMaxResults($limit)
+        ;
+
+        $doctrinePaginator = new DoctrinePaginator($queryBuilder);
+
+        return new TraversablePaginator(
+            new ArrayIterator(iterator_to_array($doctrinePaginator, false)),
+            $page,
+            $limit,
+            (float) count($doctrinePaginator),
         );
     }
 }