fix(project) : permet de choisir un workflow à la création + filet par défaut

La création de projet échouait : `Project.workflow` est obligatoire mais
n'était jamais fourni (formulaire frontend, MCP create-project), tout POST
/api/projects partait en erreur de validation/contrainte NOT NULL.

- ProjectDefaultWorkflowListener (prePersist) : assigne le workflow par
  défaut quand aucun n'est fourni, couvrant API Platform, API brute et MCP.
- retrait de l'Assert\NotNull sur Project::workflow (la validation tournait
  avant le flush et empêchait le filet) ; la contrainte DB reste le garde-fou.
- CreateProjectTool (MCP) : paramètre optionnel workflowId.
- ProjectDrawer : sélecteur Workflow en création, pré-rempli sur le défaut,
  IRI envoyée dans le payload.
- tests fonctionnels : création avec et sans workflow.

src/Module/ProjectManagement/Domain/Entity/Project.php

@@ -92,10 +92,11 @@ class Project implements ProjectInterface, TimestampableInterface, BlamableInter
     #[Groups(['project:read', 'project:write'])]
     private ?ClientInterface $client = null;
 
+    // workflow_id reste NOT NULL en base ; quand l'appelant n'en fournit pas,
+    // ProjectDefaultWorkflowListener assigne le workflow par défaut au prePersist.
     #[ORM\ManyToOne(targetEntity: Workflow::class)]
     #[ORM\JoinColumn(nullable: false, onDelete: 'RESTRICT')]
     #[Groups(['project:read', 'project:write', 'task:read'])]
-    #[Assert\NotNull(message: 'Un projet doit avoir un workflow.')]
     private ?Workflow $workflow = null;
 
     #[ORM\Column(length: 255, nullable: true)]

src/Module/ProjectManagement/Infrastructure/EventListener/ProjectDefaultWorkflowListener.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\ProjectManagement\Infrastructure\EventListener;
+
+use App\Module\ProjectManagement\Domain\Entity\Project;
+use App\Module\ProjectManagement\Domain\Repository\WorkflowRepositoryInterface;
+use Doctrine\ORM\Event\PrePersistEventArgs;
+
+/**
+ * Assigns the default workflow to a project when none was provided.
+ * Guarantees the NOT NULL workflow_id constraint across every persistence
+ * path (API Platform, raw API, MCP) without forcing the caller to supply one.
+ */
+final readonly class ProjectDefaultWorkflowListener
+{
+    public function __construct(private WorkflowRepositoryInterface $workflowRepository) {}
+
+    public function prePersist(Project $project, PrePersistEventArgs $args): void
+    {
+        if (null !== $project->getWorkflow()) {
+            return;
+        }
+
+        $default = $this->workflowRepository->findDefault()
+            ?? ($this->workflowRepository->findBy([], ['position' => 'ASC'], 1)[0] ?? null);
+
+        if (null !== $default) {
+            $project->setWorkflow($default);
+        }
+    }
+}

src/Module/ProjectManagement/Infrastructure/Mcp/Tool/Project/CreateProjectTool.php

@@ -6,6 +6,7 @@ namespace App\Module\ProjectManagement\Infrastructure\Mcp\Tool\Project;
 
 use App\Module\Directory\Domain\Repository\ClientRepositoryInterface;
 use App\Module\ProjectManagement\Domain\Entity\Project;
+use App\Module\ProjectManagement\Domain\Repository\WorkflowRepositoryInterface;
 use App\Shared\Infrastructure\Mcp\Serializer;
 use Doctrine\ORM\EntityManagerInterface;
 use InvalidArgumentException;
@@ -15,12 +16,13 @@ use Symfony\Component\Security\Core\Exception\AccessDeniedException;
 
 use function sprintf;
 
-#[McpTool(name: 'create-project', description: 'Create a new project. Code must be 2-10 uppercase letters.')]
+#[McpTool(name: 'create-project', description: 'Create a new project. Code must be 2-10 uppercase letters. Optional workflowId selects the kanban workflow; the default workflow is used when omitted.')]
 class CreateProjectTool
 {
     public function __construct(
         private readonly EntityManagerInterface $entityManager,
         private readonly ClientRepositoryInterface $clientRepository,
+        private readonly WorkflowRepositoryInterface $workflowRepository,
         private readonly Security $security,
     ) {}
 
@@ -30,6 +32,7 @@ class CreateProjectTool
         ?string $description = null,
         ?string $color = null,
         ?int $clientId = null,
+        ?int $workflowId = null,
     ): string {
         if (!$this->security->isGranted('ROLE_USER')) {
             throw new AccessDeniedException('Access denied: ROLE_USER required.');
@@ -52,6 +55,14 @@ class CreateProjectTool
             }
             $project->setClient($client);
         }
+        if (null !== $workflowId) {
+            $workflow = $this->workflowRepository->findById($workflowId);
+            if (null === $workflow) {
+                throw new InvalidArgumentException(sprintf('Workflow with ID %d not found.', $workflowId));
+            }
+            $project->setWorkflow($workflow);
+        }
+        // When no workflow is supplied, ProjectDefaultWorkflowListener assigns the default at prePersist.
 
         $this->entityManager->persist($project);
         $this->entityManager->flush();