feat(permissions) : add role-based access control system

Backend:
- Add role hierarchy (ADMIN > GESTIONNAIRE > VIEWER > USER) in security.yaml
- Add password authentication on profile activation (SessionProfileController)
- Add SessionProfileAuthenticator with stateless API firewall
- Add ProfilePasswordHasher state processor for API Platform
- Add security annotations on all 18 API Platform entities
- Add denyAccessUnlessGranted on all 13 custom controllers
- Add AdminProfileController for profile/role management (/api/admin/profiles)
- Add InitProfilePasswordsCommand for initial admin setup
- Simplify SessionProfilesController to list-only (removed create/delete)

Frontend (submodule update):
- Add usePermissions composable (isAdmin, canEdit, canView, isGranted)
- Add password login modal on profiles page
- Add admin backoffice page for profile management
- Disable all form fields for ROLE_VIEWER across all edit/create pages
- Show navigation buttons for all roles, hide destructive actions for viewers
- Add readonly mode to ModelTypeForm and site/constructeur modals
- Guard /admin routes in middleware
- Configure Vite proxy for API requests

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

src/State/ProfilePasswordHasher.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\State;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Entity\Profile;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Symfony\Component\PasswordHasher\Hasher\UserPasswordHasherInterface;
+
+final class ProfilePasswordHasher implements ProcessorInterface
+{
+    public function __construct(
+        #[Autowire(service: 'api_platform.doctrine.orm.state.persist_processor')]
+        private readonly ProcessorInterface $decorated,
+        private readonly UserPasswordHasherInterface $passwordHasher,
+    ) {}
+
+    /**
+     * @param array<string, mixed> $uriVariables
+     * @param array<string, mixed> $context
+     */
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): mixed
+    {
+        if ($data instanceof Profile && $data->getPlainPassword()) {
+            $data->setPassword(
+                $this->passwordHasher->hashPassword($data, $data->getPlainPassword())
+            );
+            $data->eraseCredentials();
+        }
+
+        return $this->decorated->process($data, $operation, $uriVariables, $context);
+    }
+}