feat(manga): implémenter la page Découvrir avec recommandations MangaDex

- Endpoint GET /api/manga-discover via DiscoverMangaStateProvider + DiscoverMangaHandler
- Algorithme : top 5 manga de la collection → appel /manga/{id}/recommendation
  par source → agrégation avec système de votes (multi-sources = plus pertinent)
- Filtrage : tags exclus (Oneshot, Doujinshi, Self-Published), contentRating,
  et suppression des manga déjà en bibliothèque
- Page Vue DiscoverPage.vue : chargement auto au montage, bouton Actualiser,
  modal détail, ajout à la bibliothèque
- Adapteurs InMemory de test mis à jour (discover + getMangaRecommendations)

src/Domain/Manga/Infrastructure/ApiPlatform/Resource/MangaDiscoverResource.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Domain\Manga\Infrastructure\ApiPlatform\Resource;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Get;
+use App\Domain\Manga\Infrastructure\ApiPlatform\Dto\MangaSearchCollection;
+use App\Domain\Manga\Infrastructure\ApiPlatform\State\Provider\DiscoverMangaStateProvider;
+
+#[ApiResource(
+    shortName: 'Mangadex',
+    operations: [
+        new Get(
+            uriTemplate: '/manga-discover',
+            output: MangaSearchCollection::class,
+            provider: DiscoverMangaStateProvider::class
+        )
+    ]
+)]
+class MangaDiscoverResource
+{
+}

src/Domain/Manga/Infrastructure/ApiPlatform/State/Provider/DiscoverMangaStateProvider.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Domain\Manga\Infrastructure\ApiPlatform\State\Provider;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProviderInterface;
+use App\Domain\Manga\Application\Query\DiscoverManga;
+use App\Domain\Manga\Application\QueryHandler\DiscoverMangaHandler;
+use App\Domain\Manga\Infrastructure\ApiPlatform\Dto\MangaSearchCollection;
+use App\Domain\Manga\Infrastructure\ApiPlatform\Dto\MangaSearchItem;
+
+readonly class DiscoverMangaStateProvider implements ProviderInterface
+{
+    public function __construct(private DiscoverMangaHandler $handler)
+    {
+    }
+
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): MangaSearchCollection
+    {
+        $response = $this->handler->handle(new DiscoverManga());
+
+        return new MangaSearchCollection(
+            items: array_map(
+                fn ($item) => new MangaSearchItem(
+                    externalId: $item->externalId,
+                    title: $item->title,
+                    slug: $item->slug,
+                    description: $item->description,
+                    author: $item->author,
+                    publicationYear: $item->publicationYear,
+                    genres: $item->genres,
+                    status: $item->status,
+                    imageUrl: $item->imageUrl,
+                    thumbnailUrl: $item->thumbnailUrl,
+                    rating: $item->rating
+                ),
+                $response->items
+            )
+        );
+    }
+}