feat: Attribution de rôles multiples par utilisateur

Les utilisateurs Classeo étaient limités à un seul rôle, alors que
dans la réalité scolaire un directeur peut aussi être enseignant,
ou un parent peut avoir un rôle vie scolaire. Cette limitation
obligeait à créer des comptes distincts par fonction.

Le modèle User supporte désormais plusieurs rôles simultanés avec
basculement via le header. L'admin peut attribuer/retirer des rôles
depuis l'interface de gestion, avec des garde-fous : pas d'auto-
destitution, pas d'escalade de privilèges (seul SUPER_ADMIN peut
attribuer SUPER_ADMIN), vérification du statut actif pour le
switch de rôle, et TTL explicite sur le cache de rôle actif.

backend/config/packages/security.yaml

@@ -1,4 +1,14 @@
 security:
+    # Role hierarchy — Direction inherits read permissions on whole school (AC3, FR5)
+    role_hierarchy:
+        ROLE_SUPER_ADMIN: [ROLE_ADMIN]
+        ROLE_ADMIN: [ROLE_PROF, ROLE_VIE_SCOLAIRE, ROLE_SECRETARIAT]
+        ROLE_PROF: [ROLE_USER]
+        ROLE_VIE_SCOLAIRE: [ROLE_USER]
+        ROLE_SECRETARIAT: [ROLE_USER]
+        ROLE_PARENT: [ROLE_USER]
+        ROLE_ELEVE: [ROLE_USER]
+
     # https://symfony.com/doc/current/security.html#registering-the-user-hashing-passwords
     password_hashers:
         Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface: 'auto'

backend/config/services.yaml

@@ -151,6 +151,10 @@ services:
     App\Administration\Application\Port\GradeExistenceChecker:
         alias: App\Administration\Infrastructure\Service\NoOpGradeExistenceChecker
 
+    # ActiveRoleStore (session-scoped cache for active role switching)
+    App\Administration\Application\Port\ActiveRoleStore:
+        alias: App\Administration\Infrastructure\Service\CacheActiveRoleStore
+
     # GeoLocation Service (null implementation - no geolocation)
     App\Administration\Application\Port\GeoLocationService:
         alias: App\Administration\Infrastructure\Service\NullGeoLocationService

backend/src/Administration/Application/Command/AssignRole/AssignRoleCommand.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Command\AssignRole;
+
+final readonly class AssignRoleCommand
+{
+    public function __construct(
+        public string $userId,
+        public string $role,
+        public string $tenantId = '',
+    ) {
+    }
+}

backend/src/Administration/Application/Command/AssignRole/AssignRoleHandler.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Command\AssignRole;
+
+use App\Administration\Domain\Exception\UserNotFoundException;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use App\Administration\Domain\Model\User\UserId;
+use App\Administration\Domain\Repository\UserRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use InvalidArgumentException;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(bus: 'command.bus')]
+final readonly class AssignRoleHandler
+{
+    public function __construct(
+        private UserRepository $userRepository,
+        private Clock $clock,
+    ) {
+    }
+
+    public function __invoke(AssignRoleCommand $command): User
+    {
+        $userId = UserId::fromString($command->userId);
+        $user = $this->userRepository->get($userId);
+
+        if ($command->tenantId !== '' && !$user->tenantId->equals(TenantId::fromString($command->tenantId))) {
+            throw UserNotFoundException::withId($userId);
+        }
+
+        $role = Role::tryFrom($command->role);
+        if ($role === null) {
+            throw new InvalidArgumentException("Rôle invalide : \"{$command->role}\".");
+        }
+
+        $user->attribuerRole($role, $this->clock->now());
+
+        $this->userRepository->save($user);
+
+        return $user;
+    }
+}

backend/src/Administration/Application/Command/InviteUser/InviteUserCommand.php

@@ -4,8 +4,18 @@ declare(strict_types=1);
 
 namespace App\Administration\Application\Command\InviteUser;
 
+use InvalidArgumentException;
+
+use function is_string;
+
 final readonly class InviteUserCommand
 {
+    /** @var string[] */
+    public array $roles;
+
+    /**
+     * @param string[] $roles
+     */
     public function __construct(
         public string $tenantId,
         public string $schoolName,
@@ -14,6 +24,16 @@ final readonly class InviteUserCommand
         public string $firstName,
         public string $lastName,
         public ?string $dateNaissance = null,
+        array $roles = [],
     ) {
+        $resolved = $roles !== [] ? $roles : [$role];
+
+        foreach ($resolved as $r) {
+            if (!is_string($r)) {
+                throw new InvalidArgumentException('Chaque rôle doit être une chaîne de caractères.');
+            }
+        }
+
+        $this->roles = $resolved;
     }
 }

backend/src/Administration/Application/Command/InviteUser/InviteUserHandler.php

@@ -11,6 +11,10 @@ use App\Administration\Domain\Model\User\User;
 use App\Administration\Domain\Repository\UserRepository;
 use App\Shared\Domain\Clock;
 use App\Shared\Domain\Tenant\TenantId;
+
+use function array_map;
+use function array_slice;
+
 use DateTimeImmutable;
 use InvalidArgumentException;
 use Symfony\Component\Messenger\Attribute\AsMessageHandler;
@@ -26,16 +30,24 @@ final readonly class InviteUserHandler
 
     /**
      * @throws EmailDejaUtiliseeException if email is already used in this tenant
-     * @throws InvalidArgumentException   if the role is invalid
+     * @throws InvalidArgumentException   if a role is invalid
      */
     public function __invoke(InviteUserCommand $command): User
     {
         $tenantId = TenantId::fromString($command->tenantId);
         $email = new Email($command->email);
 
-        $role = Role::tryFrom($command->role);
+        $roles = array_map(static function (string $r): Role {
-        if ($role === null) {
+            $role = Role::tryFrom($r);
-            throw new InvalidArgumentException("Rôle invalide : \"{$command->role}\".");
+            if ($role === null) {
+                throw new InvalidArgumentException("Rôle invalide : \"{$r}\".");
+            }
+
+            return $role;
+        }, $command->roles);
+
+        if ($roles === []) {
+            throw new InvalidArgumentException('Au moins un rôle est requis.');
         }
 
         $existingUser = $this->userRepository->findByEmail($email, $tenantId);
@@ -43,19 +55,25 @@ final readonly class InviteUserHandler
             throw EmailDejaUtiliseeException::dansTenant($email, $tenantId);
         }
 
+        $now = $this->clock->now();
+
         $user = User::inviter(
             email: $email,
-            role: $role,
+            role: $roles[0],
             tenantId: $tenantId,
             schoolName: $command->schoolName,
             firstName: $command->firstName,
             lastName: $command->lastName,
-            invitedAt: $this->clock->now(),
+            invitedAt: $now,
             dateNaissance: $command->dateNaissance !== null
                 ? new DateTimeImmutable($command->dateNaissance)
                 : null,
         );
 
+        foreach (array_slice($roles, 1) as $additionalRole) {
+            $user->attribuerRole($additionalRole, $now);
+        }
+
         $this->userRepository->save($user);
 
         return $user;

backend/src/Administration/Application/Command/RemoveRole/RemoveRoleCommand.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Command\RemoveRole;
+
+final readonly class RemoveRoleCommand
+{
+    public function __construct(
+        public string $userId,
+        public string $role,
+        public string $tenantId = '',
+    ) {
+    }
+}

backend/src/Administration/Application/Command/RemoveRole/RemoveRoleHandler.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Command\RemoveRole;
+
+use App\Administration\Domain\Exception\UserNotFoundException;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use App\Administration\Domain\Model\User\UserId;
+use App\Administration\Domain\Repository\UserRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use InvalidArgumentException;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(bus: 'command.bus')]
+final readonly class RemoveRoleHandler
+{
+    public function __construct(
+        private UserRepository $userRepository,
+        private Clock $clock,
+    ) {
+    }
+
+    public function __invoke(RemoveRoleCommand $command): User
+    {
+        $userId = UserId::fromString($command->userId);
+        $user = $this->userRepository->get($userId);
+
+        if ($command->tenantId !== '' && !$user->tenantId->equals(TenantId::fromString($command->tenantId))) {
+            throw UserNotFoundException::withId($userId);
+        }
+
+        $role = Role::tryFrom($command->role);
+        if ($role === null) {
+            throw new InvalidArgumentException("Rôle invalide : \"{$command->role}\".");
+        }
+
+        $user->retirerRole($role, $this->clock->now());
+
+        $this->userRepository->save($user);
+
+        return $user;
+    }
+}

backend/src/Administration/Application/Command/UpdateUserRoles/UpdateUserRolesCommand.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Command\UpdateUserRoles;
+
+use InvalidArgumentException;
+
+use function is_string;
+
+final readonly class UpdateUserRolesCommand
+{
+    /**
+     * @param string[] $roles
+     */
+    public function __construct(
+        public string $userId,
+        public array $roles,
+        public string $tenantId = '',
+    ) {
+        foreach ($roles as $r) {
+            if (!is_string($r)) {
+                throw new InvalidArgumentException('Chaque rôle doit être une chaîne de caractères.');
+            }
+        }
+    }
+}

backend/src/Administration/Application/Command/UpdateUserRoles/UpdateUserRolesHandler.php

@@ -0,0 +1,83 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Command\UpdateUserRoles;
+
+use App\Administration\Application\Port\ActiveRoleStore;
+use App\Administration\Domain\Exception\UserNotFoundException;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use App\Administration\Domain\Model\User\UserId;
+use App\Administration\Domain\Repository\UserRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+
+use function array_filter;
+use function array_map;
+use function array_values;
+use function in_array;
+
+use InvalidArgumentException;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(bus: 'command.bus')]
+final readonly class UpdateUserRolesHandler
+{
+    public function __construct(
+        private UserRepository $userRepository,
+        private Clock $clock,
+        private ActiveRoleStore $activeRoleStore,
+    ) {
+    }
+
+    public function __invoke(UpdateUserRolesCommand $command): User
+    {
+        $userId = UserId::fromString($command->userId);
+        $user = $this->userRepository->get($userId);
+
+        if ($command->tenantId !== '' && !$user->tenantId->equals(TenantId::fromString($command->tenantId))) {
+            throw UserNotFoundException::withId($userId);
+        }
+
+        if ($command->roles === []) {
+            throw new InvalidArgumentException('Au moins un rôle est requis.');
+        }
+
+        $targetRoles = array_map(static function (string $r): Role {
+            $role = Role::tryFrom($r);
+            if ($role === null) {
+                throw new InvalidArgumentException("Rôle invalide : \"{$r}\".");
+            }
+
+            return $role;
+        }, $command->roles);
+
+        $now = $this->clock->now();
+
+        // Add new roles first to avoid "last role" exception
+        foreach ($targetRoles as $targetRole) {
+            if (!$user->aLeRole($targetRole)) {
+                $user->attribuerRole($targetRole, $now);
+            }
+        }
+
+        // Collect roles to remove, then remove them (avoid mutating during iteration)
+        /** @var list<Role> $rolesToRemove */
+        $rolesToRemove = array_values(array_filter(
+            $user->roles,
+            static fn (Role $currentRole) => !in_array($currentRole, $targetRoles, true),
+        ));
+
+        foreach ($rolesToRemove as $roleToRemove) {
+            $user->retirerRole($roleToRemove, $now);
+        }
+
+        $this->userRepository->save($user);
+
+        // Clear cached active role to avoid stale reference to a removed role
+        $this->activeRoleStore->clear($user);
+
+        return $user;
+    }
+}

backend/src/Administration/Application/Port/ActiveRoleStore.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Port;
+
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+
+/**
+ * Port interface for storing the user's currently active role.
+ *
+ * When a user has multiple roles (FR5), they can switch between them.
+ * This store persists the selected role across requests.
+ */
+interface ActiveRoleStore
+{
+    /**
+     * Stores the active role for the given user.
+     */
+    public function store(User $user, Role $role): void;
+
+    /**
+     * Returns the stored active role for the given user, or null if none.
+     */
+    public function get(User $user): ?Role;
+
+    /**
+     * Clears the stored active role for the given user (e.g. at logout).
+     */
+    public function clear(User $user): void;
+}

backend/src/Administration/Application/Query/GetUsers/GetUsersHandler.php

@@ -35,7 +35,7 @@ final readonly class GetUsersHandler
             if ($filterRole !== null) {
                 $users = array_filter(
                     $users,
-                    static fn ($user) => $user->role === $filterRole,
+                    static fn ($user) => $user->aLeRole($filterRole),
                 );
             }
         }

backend/src/Administration/Application/Query/GetUsers/UserDto.php

@@ -4,17 +4,23 @@ declare(strict_types=1);
 
 namespace App\Administration\Application\Query\GetUsers;
 
+use App\Administration\Domain\Model\User\Role;
 use App\Administration\Domain\Model\User\User;
 use App\Shared\Domain\Clock;
 use DateTimeImmutable;
 
 final readonly class UserDto
 {
+    /**
+     * @param string[] $roles
+     */
     public function __construct(
         public string $id,
         public string $email,
         public string $role,
         public string $roleLabel,
+        /** @var string[] */
+        public array $roles,
         public string $firstName,
         public string $lastName,
         public string $statut,
@@ -34,6 +40,7 @@ final readonly class UserDto
             email: (string) $user->email,
             role: $user->role->value,
             roleLabel: $user->role->label(),
+            roles: array_map(static fn (Role $r) => $r->value, $user->roles),
             firstName: $user->firstName,
             lastName: $user->lastName,
             statut: $user->statut->value,

backend/src/Administration/Application/Service/RoleContext.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Application\Service;
+
+use App\Administration\Application\Port\ActiveRoleStore;
+use App\Administration\Domain\Exception\RoleNonAttribueException;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use DomainException;
+
+final class RoleContext
+{
+    public function __construct(
+        private readonly ActiveRoleStore $activeRoleStore,
+    ) {
+    }
+
+    public function switchTo(User $user, Role $role): void
+    {
+        if (!$user->peutSeConnecter()) {
+            throw new DomainException('Le compte n\'est pas actif.');
+        }
+
+        if (!$user->aLeRole($role)) {
+            throw RoleNonAttribueException::pour($user->id, $role);
+        }
+
+        $this->activeRoleStore->store($user, $role);
+    }
+
+    public function getActiveRole(User $user): Role
+    {
+        $stored = $this->activeRoleStore->get($user);
+
+        if ($stored !== null) {
+            return $stored;
+        }
+
+        return $user->rolePrincipal();
+    }
+
+    public function clear(User $user): void
+    {
+        $this->activeRoleStore->clear($user);
+    }
+}

backend/src/Administration/Domain/Event/RoleAttribue.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Domain\Event;
+
+use App\Administration\Domain\Model\User\UserId;
+use App\Shared\Domain\DomainEvent;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use Override;
+use Ramsey\Uuid\UuidInterface;
+
+final readonly class RoleAttribue implements DomainEvent
+{
+    public function __construct(
+        public UserId $userId,
+        public string $email,
+        public string $role,
+        public TenantId $tenantId,
+        private DateTimeImmutable $occurredOn,
+    ) {
+    }
+
+    #[Override]
+    public function occurredOn(): DateTimeImmutable
+    {
+        return $this->occurredOn;
+    }
+
+    #[Override]
+    public function aggregateId(): UuidInterface
+    {
+        return $this->userId->value;
+    }
+}

backend/src/Administration/Domain/Event/RoleRetire.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Domain\Event;
+
+use App\Administration\Domain\Model\User\UserId;
+use App\Shared\Domain\DomainEvent;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use Override;
+use Ramsey\Uuid\UuidInterface;
+
+final readonly class RoleRetire implements DomainEvent
+{
+    public function __construct(
+        public UserId $userId,
+        public string $email,
+        public string $role,
+        public TenantId $tenantId,
+        private DateTimeImmutable $occurredOn,
+    ) {
+    }
+
+    #[Override]
+    public function occurredOn(): DateTimeImmutable
+    {
+        return $this->occurredOn;
+    }
+
+    #[Override]
+    public function aggregateId(): UuidInterface
+    {
+        return $this->userId->value;
+    }
+}

backend/src/Administration/Domain/Exception/ActivationTokenAlreadyUsedException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\ActivationToken\ActivationTokenId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class ActivationTokenAlreadyUsedException extends RuntimeException
+final class ActivationTokenAlreadyUsedException extends DomainException
 {
     public static function forToken(ActivationTokenId $tokenId): self
     {

backend/src/Administration/Domain/Exception/ActivationTokenExpiredException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\ActivationToken\ActivationTokenId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class ActivationTokenExpiredException extends RuntimeException
+final class ActivationTokenExpiredException extends DomainException
 {
     public static function forToken(ActivationTokenId $tokenId): self
     {

backend/src/Administration/Domain/Exception/ActivationTokenNotFoundException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\ActivationToken\ActivationTokenId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class ActivationTokenNotFoundException extends RuntimeException
+final class ActivationTokenNotFoundException extends DomainException
 {
     public static function withId(ActivationTokenId $tokenId): self
     {

backend/src/Administration/Domain/Exception/CannotChangeGradingModeWithExistingGradesException.php

@@ -4,9 +4,9 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
-final class CannotChangeGradingModeWithExistingGradesException extends RuntimeException
+final class CannotChangeGradingModeWithExistingGradesException extends DomainException
 {
     public function __construct()
     {

backend/src/Administration/Domain/Exception/ClassNameInvalideException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class ClassNameInvalideException extends RuntimeException
+final class ClassNameInvalideException extends DomainException
 {
     public static function pourLongueur(string $value, int $min, int $max): self
     {

backend/src/Administration/Domain/Exception/ClasseDejaExistanteException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\SchoolClass\ClassName;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class ClasseDejaExistanteException extends RuntimeException
+final class ClasseDejaExistanteException extends DomainException
 {
     public static function avecNom(ClassName $name): self
     {

backend/src/Administration/Domain/Exception/ClasseNonSupprimableException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\SchoolClass\ClassId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class ClasseNonSupprimableException extends RuntimeException
+final class ClasseNonSupprimableException extends DomainException
 {
     public static function carElevesAffectes(ClassId $classId, int $nombreEleves): self
     {

backend/src/Administration/Domain/Exception/ClasseNotFoundException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\SchoolClass\ClassId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class ClasseNotFoundException extends RuntimeException
+final class ClasseNotFoundException extends DomainException
 {
     public static function withId(ClassId $classId): self
     {

backend/src/Administration/Domain/Exception/CompteNonActivableException.php

@@ -6,11 +6,11 @@ namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\User\StatutCompte;
 use App\Administration\Domain\Model\User\UserId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class CompteNonActivableException extends RuntimeException
+final class CompteNonActivableException extends DomainException
 {
     public static function carStatutIncompatible(UserId $userId, StatutCompte $statut): self
     {

backend/src/Administration/Domain/Exception/DernierRoleNonRetirableException.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Domain\Exception;
+
+use App\Administration\Domain\Model\User\UserId;
+use DomainException;
+
+use function sprintf;
+
+final class DernierRoleNonRetirableException extends DomainException
+{
+    public static function pour(UserId $userId): self
+    {
+        return new self(sprintf(
+            'Impossible de retirer le dernier rôle de l\'utilisateur %s.',
+            $userId,
+        ));
+    }
+}

backend/src/Administration/Domain/Exception/EmailDejaUtiliseeException.php

@@ -6,11 +6,11 @@ namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\User\Email;
 use App\Shared\Domain\Tenant\TenantId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class EmailDejaUtiliseeException extends RuntimeException
+final class EmailDejaUtiliseeException extends DomainException
 {
     public static function dansTenant(Email $email, TenantId $tenantId): self
     {

backend/src/Administration/Domain/Exception/EmailInvalideException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class EmailInvalideException extends RuntimeException
+final class EmailInvalideException extends DomainException
 {
     public static function pourAdresse(string $email): self
     {

backend/src/Administration/Domain/Exception/GradingConfigurationNotFoundException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\GradingConfiguration\SchoolGradingConfigurationId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class GradingConfigurationNotFoundException extends RuntimeException
+final class GradingConfigurationNotFoundException extends DomainException
 {
     public static function withId(SchoolGradingConfigurationId $id): self
     {

backend/src/Administration/Domain/Exception/InvalidPeriodCountException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class InvalidPeriodCountException extends RuntimeException
+final class InvalidPeriodCountException extends DomainException
 {
     public static function forType(string $type, int $expected, int $actual): self
     {

backend/src/Administration/Domain/Exception/InvalidPeriodDatesException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class InvalidPeriodDatesException extends RuntimeException
+final class InvalidPeriodDatesException extends DomainException
 {
     public static function endBeforeStart(string $label, string $start, string $end): self
     {

backend/src/Administration/Domain/Exception/PasswordResetTokenAlreadyUsedException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\PasswordResetToken\PasswordResetTokenId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class PasswordResetTokenAlreadyUsedException extends RuntimeException
+final class PasswordResetTokenAlreadyUsedException extends DomainException
 {
     public static function forToken(PasswordResetTokenId $tokenId): self
     {

backend/src/Administration/Domain/Exception/PasswordResetTokenExpiredException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\PasswordResetToken\PasswordResetTokenId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class PasswordResetTokenExpiredException extends RuntimeException
+final class PasswordResetTokenExpiredException extends DomainException
 {
     public static function forToken(PasswordResetTokenId $tokenId): self
     {

backend/src/Administration/Domain/Exception/PasswordResetTokenNotFoundException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\PasswordResetToken\PasswordResetTokenId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class PasswordResetTokenNotFoundException extends RuntimeException
+final class PasswordResetTokenNotFoundException extends DomainException
 {
     public static function withId(PasswordResetTokenId $tokenId): self
     {

backend/src/Administration/Domain/Exception/PeriodeAvecNotesException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class PeriodeAvecNotesException extends RuntimeException
+final class PeriodeAvecNotesException extends DomainException
 {
     public static function confirmationRequise(string $label): self
     {

backend/src/Administration/Domain/Exception/PeriodeNonTrouveeException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class PeriodeNonTrouveeException extends RuntimeException
+final class PeriodeNonTrouveeException extends DomainException
 {
     public static function pourSequence(int $sequence, string $academicYearId): self
     {

backend/src/Administration/Domain/Exception/PeriodesDejaConfigureesException.php

@@ -4,9 +4,9 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
-final class PeriodesDejaConfigureesException extends RuntimeException
+final class PeriodesDejaConfigureesException extends DomainException
 {
     public static function pourAnnee(string $academicYearId): self
     {

backend/src/Administration/Domain/Exception/PeriodesNonConfigureesException.php

@@ -4,9 +4,9 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
-final class PeriodesNonConfigureesException extends RuntimeException
+final class PeriodesNonConfigureesException extends DomainException
 {
     public static function pourAnnee(string $academicYearId): self
     {

backend/src/Administration/Domain/Exception/PeriodsCoverageGapException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class PeriodsCoverageGapException extends RuntimeException
+final class PeriodsCoverageGapException extends DomainException
 {
     public static function gapBetween(string $periodA, string $periodB): self
     {

backend/src/Administration/Domain/Exception/PeriodsOverlapException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class PeriodsOverlapException extends RuntimeException
+final class PeriodsOverlapException extends DomainException
 {
     public static function between(string $periodA, string $periodB): self
     {

backend/src/Administration/Domain/Exception/RoleDejaAttribueException.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Domain\Exception;
+
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\UserId;
+use DomainException;
+
+use function sprintf;
+
+final class RoleDejaAttribueException extends DomainException
+{
+    public static function pour(UserId $userId, Role $role): self
+    {
+        return new self(sprintf(
+            'Le rôle « %s » est déjà attribué à l\'utilisateur %s.',
+            $role->label(),
+            $userId,
+        ));
+    }
+}

backend/src/Administration/Domain/Exception/RoleNonAttribueException.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Domain\Exception;
+
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\UserId;
+use DomainException;
+
+use function sprintf;
+
+final class RoleNonAttribueException extends DomainException
+{
+    public static function pour(UserId $userId, Role $role): self
+    {
+        return new self(sprintf(
+            'Le rôle « %s » n\'est pas attribué à l\'utilisateur %s.',
+            $role->label(),
+            $userId,
+        ));
+    }
+}

backend/src/Administration/Domain/Exception/SessionNotFoundException.php

@@ -5,7 +5,7 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\RefreshToken\TokenFamilyId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
@@ -14,7 +14,7 @@ use function sprintf;
  *
  * @see Story 1.6 - Gestion des sessions
  */
-final class SessionNotFoundException extends RuntimeException
+final class SessionNotFoundException extends DomainException
 {
     public function __construct(TokenFamilyId $familyId)
     {

backend/src/Administration/Domain/Exception/SubjectCodeInvalideException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class SubjectCodeInvalideException extends RuntimeException
+final class SubjectCodeInvalideException extends DomainException
 {
     public static function pourFormat(string $value, int $min, int $max): self
     {

backend/src/Administration/Domain/Exception/SubjectColorInvalideException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class SubjectColorInvalideException extends RuntimeException
+final class SubjectColorInvalideException extends DomainException
 {
     public static function pourFormat(string $value): self
     {

backend/src/Administration/Domain/Exception/SubjectDejaExistanteException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\Subject\SubjectCode;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class SubjectDejaExistanteException extends RuntimeException
+final class SubjectDejaExistanteException extends DomainException
 {
     public static function avecCode(SubjectCode $code): self
     {

backend/src/Administration/Domain/Exception/SubjectNameInvalideException.php

@@ -4,11 +4,11 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class SubjectNameInvalideException extends RuntimeException
+final class SubjectNameInvalideException extends DomainException
 {
     public static function pourLongueur(string $value, int $min, int $max): self
     {

backend/src/Administration/Domain/Exception/SubjectNonSupprimableException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\Subject\SubjectId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class SubjectNonSupprimableException extends RuntimeException
+final class SubjectNonSupprimableException extends DomainException
 {
     public static function avecNotes(SubjectId $id): self
     {

backend/src/Administration/Domain/Exception/SubjectNotFoundException.php

@@ -5,11 +5,11 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\Subject\SubjectId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class SubjectNotFoundException extends RuntimeException
+final class SubjectNotFoundException extends DomainException
 {
     public static function withId(SubjectId $id): self
     {

backend/src/Administration/Domain/Exception/TokenAlreadyRotatedException.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 /**
  * Exception thrown when a refresh token has already been rotated but is still in grace period.
@@ -14,7 +14,7 @@ use RuntimeException;
  *
  * @see Story 1.4 - Connexion utilisateur
  */
-final class TokenAlreadyRotatedException extends RuntimeException
+final class TokenAlreadyRotatedException extends DomainException
 {
     public function __construct()
     {

backend/src/Administration/Domain/Exception/TokenConsumptionInProgressException.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace App\Administration\Domain\Exception;
 
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
@@ -14,7 +14,7 @@ use function sprintf;
  * This indicates a concurrent request is processing the same token,
  * and the client should retry after a short delay.
  */
-final class TokenConsumptionInProgressException extends RuntimeException
+final class TokenConsumptionInProgressException extends DomainException
 {
     public function __construct(string $tokenValue)
     {

backend/src/Administration/Domain/Exception/TokenReplayDetectedException.php

@@ -5,7 +5,7 @@ declare(strict_types=1);
 namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\RefreshToken\TokenFamilyId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
@@ -21,7 +21,7 @@ use function sprintf;
  * - Un audit log doit être créé
  * - Une alerte de sécurité peut être envoyée
  */
-final class TokenReplayDetectedException extends RuntimeException
+final class TokenReplayDetectedException extends DomainException
 {
     public function __construct(
         public readonly TokenFamilyId $familyId,

backend/src/Administration/Domain/Exception/UserNotFoundException.php

@@ -6,11 +6,11 @@ namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\User\Email;
 use App\Administration\Domain\Model\User\UserId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class UserNotFoundException extends RuntimeException
+final class UserNotFoundException extends DomainException
 {
     public static function withId(UserId $userId): self
     {

backend/src/Administration/Domain/Exception/UtilisateurDejaInviteException.php

@@ -6,11 +6,11 @@ namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\User\StatutCompte;
 use App\Administration\Domain\Model\User\UserId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class UtilisateurDejaInviteException extends RuntimeException
+final class UtilisateurDejaInviteException extends DomainException
 {
     public static function carStatutIncompatible(UserId $userId, StatutCompte $statut): self
     {

backend/src/Administration/Domain/Exception/UtilisateurNonBlocableException.php

@@ -6,11 +6,11 @@ namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\User\StatutCompte;
 use App\Administration\Domain\Model\User\UserId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class UtilisateurNonBlocableException extends RuntimeException
+final class UtilisateurNonBlocableException extends DomainException
 {
     public static function carStatutIncompatible(UserId $userId, StatutCompte $statut): self
     {

backend/src/Administration/Domain/Exception/UtilisateurNonDeblocableException.php

@@ -6,11 +6,11 @@ namespace App\Administration\Domain\Exception;
 
 use App\Administration\Domain\Model\User\StatutCompte;
 use App\Administration\Domain\Model\User\UserId;
-use RuntimeException;
+use DomainException;
 
 use function sprintf;
 
-final class UtilisateurNonDeblocableException extends RuntimeException
+final class UtilisateurNonDeblocableException extends DomainException
 {
     public static function carStatutIncompatible(UserId $userId, StatutCompte $statut): self
     {

backend/src/Administration/Domain/Model/User/User.php

@@ -8,10 +8,15 @@ use App\Administration\Domain\Event\CompteActive;
 use App\Administration\Domain\Event\CompteCreated;
 use App\Administration\Domain\Event\InvitationRenvoyee;
 use App\Administration\Domain\Event\MotDePasseChange;
+use App\Administration\Domain\Event\RoleAttribue;
+use App\Administration\Domain\Event\RoleRetire;
 use App\Administration\Domain\Event\UtilisateurBloque;
 use App\Administration\Domain\Event\UtilisateurDebloque;
 use App\Administration\Domain\Event\UtilisateurInvite;
 use App\Administration\Domain\Exception\CompteNonActivableException;
+use App\Administration\Domain\Exception\DernierRoleNonRetirableException;
+use App\Administration\Domain\Exception\RoleDejaAttribueException;
+use App\Administration\Domain\Exception\RoleNonAttribueException;
 use App\Administration\Domain\Exception\UtilisateurDejaInviteException;
 use App\Administration\Domain\Exception\UtilisateurNonBlocableException;
 use App\Administration\Domain\Exception\UtilisateurNonDeblocableException;
@@ -19,12 +24,20 @@ use App\Administration\Domain\Model\ConsentementParental\ConsentementParental;
 use App\Administration\Domain\Policy\ConsentementParentalPolicy;
 use App\Shared\Domain\AggregateRoot;
 use App\Shared\Domain\Tenant\TenantId;
+
+use function array_values;
+use function count;
+
 use DateTimeImmutable;
 
+use function in_array;
+
+use InvalidArgumentException;
+
 /**
  * Aggregate Root representing a user in Classeo.
  *
- * A user belongs to a school (tenant) and has a role.
+ * A user belongs to a school (tenant) and can have multiple roles (FR5).
  * The account lifecycle goes through multiple statuses: creation → activation.
  * Minors (< 15 years) require parental consent before activation.
  */
@@ -37,10 +50,16 @@ final class User extends AggregateRoot
     public private(set) ?DateTimeImmutable $blockedAt = null;
     public private(set) ?string $blockedReason = null;
 
+    /** @var Role[] */
+    public private(set) array $roles;
+
+    /**
+     * @param Role[] $roles
+     */
     private function __construct(
         public private(set) UserId $id,
         public private(set) Email $email,
-        public private(set) Role $role,
+        array $roles,
         public private(set) TenantId $tenantId,
         public private(set) string $schoolName,
         public private(set) StatutCompte $statut,
@@ -49,6 +68,14 @@ final class User extends AggregateRoot
         public private(set) string $firstName = '',
         public private(set) string $lastName = '',
     ) {
+        $this->roles = $roles;
+    }
+
+    /**
+     * Returns the primary role (first assigned role) for backward compatibility.
+     */
+    public Role $role {
+        get => $this->roles[0];
     }
 
     /**
@@ -65,7 +92,7 @@ final class User extends AggregateRoot
         $user = new self(
             id: UserId::generate(),
             email: $email,
-            role: $role,
+            roles: [$role],
             tenantId: $tenantId,
             schoolName: $schoolName,
             statut: StatutCompte::EN_ATTENTE,
@@ -84,6 +111,73 @@ final class User extends AggregateRoot
         return $user;
     }
 
+    /**
+     * Assigns an additional role to the user.
+     *
+     * @throws RoleDejaAttribueException if the role is already assigned
+     */
+    public function attribuerRole(Role $role, DateTimeImmutable $at): void
+    {
+        if ($this->aLeRole($role)) {
+            throw RoleDejaAttribueException::pour($this->id, $role);
+        }
+
+        $this->roles = [...$this->roles, $role];
+
+        $this->recordEvent(new RoleAttribue(
+            userId: $this->id,
+            email: (string) $this->email,
+            role: $role->value,
+            tenantId: $this->tenantId,
+            occurredOn: $at,
+        ));
+    }
+
+    /**
+     * Removes a role from the user.
+     *
+     * @throws RoleNonAttribueException         if the role is not assigned
+     * @throws DernierRoleNonRetirableException if this is the last role
+     */
+    public function retirerRole(Role $role, DateTimeImmutable $at): void
+    {
+        if (!$this->aLeRole($role)) {
+            throw RoleNonAttribueException::pour($this->id, $role);
+        }
+
+        if (count($this->roles) === 1) {
+            throw DernierRoleNonRetirableException::pour($this->id);
+        }
+
+        $this->roles = array_values(
+            array_filter($this->roles, static fn (Role $r) => $r !== $role),
+        );
+
+        $this->recordEvent(new RoleRetire(
+            userId: $this->id,
+            email: (string) $this->email,
+            role: $role->value,
+            tenantId: $this->tenantId,
+            occurredOn: $at,
+        ));
+    }
+
+    /**
+     * Checks if the user has a specific role.
+     */
+    public function aLeRole(Role $role): bool
+    {
+        return in_array($role, $this->roles, true);
+    }
+
+    /**
+     * Returns the primary role (first assigned).
+     */
+    public function rolePrincipal(): Role
+    {
+        return $this->roles[0];
+    }
+
     /**
      * Activates the account with the hashed password.
      *
@@ -167,7 +261,7 @@ final class User extends AggregateRoot
         $user = new self(
             id: UserId::generate(),
             email: $email,
-            role: $role,
+            roles: [$role],
             tenantId: $tenantId,
             schoolName: $schoolName,
             statut: StatutCompte::EN_ATTENTE,
@@ -296,12 +390,14 @@ final class User extends AggregateRoot
     /**
      * Reconstitutes a User from storage.
      *
+     * @param Role[] $roles
+     *
      * @internal For Infrastructure use only
      */
     public static function reconstitute(
         UserId $id,
         Email $email,
-        Role $role,
+        array $roles,
         TenantId $tenantId,
         string $schoolName,
         StatutCompte $statut,
@@ -316,10 +412,14 @@ final class User extends AggregateRoot
         ?DateTimeImmutable $blockedAt = null,
         ?string $blockedReason = null,
     ): self {
+        if ($roles === []) {
+            throw new InvalidArgumentException('Un utilisateur doit avoir au moins un rôle.');
+        }
+
         $user = new self(
             id: $id,
             email: $email,
-            role: $role,
+            roles: $roles,
             tenantId: $tenantId,
             schoolName: $schoolName,
             statut: $statut,

backend/src/Administration/Infrastructure/Api/Controller/LogoutController.php

@@ -98,6 +98,17 @@ final readonly class LogoutController
                 ->withSameSite($isSecure ? 'strict' : 'lax'),
         );
 
+        // Clear session ID cookie (active role scoping)
+        $response->headers->setCookie(
+            Cookie::create('classeo_sid')
+                ->withValue('')
+                ->withExpires(new DateTimeImmutable('-1 hour'))
+                ->withPath('/api')
+                ->withHttpOnly(true)
+                ->withSecure($isSecure)
+                ->withSameSite($isSecure ? 'strict' : 'lax'),
+        );
+
         return $response;
     }
 }

backend/src/Administration/Infrastructure/Api/Processor/InviteUserProcessor.php

@@ -10,12 +10,18 @@ use App\Administration\Application\Command\InviteUser\InviteUserCommand;
 use App\Administration\Application\Command\InviteUser\InviteUserHandler;
 use App\Administration\Domain\Exception\EmailDejaUtiliseeException;
 use App\Administration\Domain\Exception\EmailInvalideException;
+use App\Administration\Domain\Model\User\Role;
 use App\Administration\Infrastructure\Api\Resource\UserResource;
+use App\Administration\Infrastructure\Security\SecurityUser;
 use App\Administration\Infrastructure\Security\UserVoter;
 use App\Shared\Domain\Clock;
 use App\Shared\Infrastructure\Tenant\TenantContext;
+
+use function in_array;
+
 use InvalidArgumentException;
 use Override;
+use Symfony\Bundle\SecurityBundle\Security;
 use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Symfony\Component\HttpKernel\Exception\ConflictHttpException;
@@ -34,6 +40,7 @@ final readonly class InviteUserProcessor implements ProcessorInterface
         private MessageBusInterface $eventBus,
         private AuthorizationCheckerInterface $authorizationChecker,
         private Clock $clock,
+        private Security $security,
     ) {
     }
 
@@ -54,6 +61,19 @@ final readonly class InviteUserProcessor implements ProcessorInterface
         $tenantId = (string) $this->tenantContext->getCurrentTenantId();
         $tenantConfig = $this->tenantContext->getCurrentTenantConfig();
 
+        // Guard: prevent privilege escalation (only SUPER_ADMIN can assign SUPER_ADMIN)
+        /** @var string[] $requestedRoles */
+        $requestedRoles = $data->roles ?? [];
+        $currentUser = $this->security->getUser();
+        if ($currentUser instanceof SecurityUser) {
+            $currentRoles = $currentUser->getRoles();
+
+            if (!in_array(Role::SUPER_ADMIN->value, $currentRoles, true)
+                && in_array(Role::SUPER_ADMIN->value, $requestedRoles, true)) {
+                throw new AccessDeniedHttpException('Seul un super administrateur peut attribuer le rôle SUPER_ADMIN.');
+            }
+        }
+
         try {
             $command = new InviteUserCommand(
                 tenantId: $tenantId,
@@ -62,6 +82,7 @@ final readonly class InviteUserProcessor implements ProcessorInterface
                 role: $data->role ?? '',
                 firstName: $data->firstName ?? '',
                 lastName: $data->lastName ?? '',
+                roles: $data->roles ?? [],
             );
 
             $user = ($this->handler)($command);

backend/src/Administration/Infrastructure/Api/Processor/SwitchRoleProcessor.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Infrastructure\Api\Processor;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Administration\Application\Service\RoleContext;
+use App\Administration\Domain\Exception\RoleNonAttribueException;
+use App\Administration\Domain\Exception\UserNotFoundException;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\UserId;
+use App\Administration\Domain\Repository\UserRepository;
+use App\Administration\Infrastructure\Api\Resource\SwitchRoleInput;
+use App\Administration\Infrastructure\Api\Resource\SwitchRoleOutput;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use DomainException;
+use Override;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+
+/**
+ * @implements ProcessorInterface<SwitchRoleInput, SwitchRoleOutput>
+ */
+final readonly class SwitchRoleProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private Security $security,
+        private UserRepository $userRepository,
+        private RoleContext $roleContext,
+    ) {
+    }
+
+    /**
+     * @param SwitchRoleInput $data
+     */
+    #[Override]
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): SwitchRoleOutput
+    {
+        $currentUser = $this->security->getUser();
+        if (!$currentUser instanceof SecurityUser) {
+            throw new UnauthorizedHttpException('Bearer', 'Authentification requise.');
+        }
+
+        $role = Role::tryFrom($data->role ?? '');
+        if ($role === null) {
+            throw new BadRequestHttpException('Rôle invalide.');
+        }
+
+        try {
+            $user = $this->userRepository->get(UserId::fromString($currentUser->userId()));
+            $this->roleContext->switchTo($user, $role);
+        } catch (UserNotFoundException $e) {
+            throw new NotFoundHttpException($e->getMessage());
+        } catch (RoleNonAttribueException $e) {
+            throw new BadRequestHttpException($e->getMessage());
+        } catch (DomainException $e) {
+            throw new AccessDeniedHttpException($e->getMessage());
+        }
+
+        return new SwitchRoleOutput(
+            activeRole: $role->value,
+            activeRoleLabel: $role->label(),
+        );
+    }
+}

backend/src/Administration/Infrastructure/Api/Processor/UpdateUserRolesProcessor.php

@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Infrastructure\Api\Processor;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Administration\Application\Command\UpdateUserRoles\UpdateUserRolesCommand;
+use App\Administration\Application\Command\UpdateUserRoles\UpdateUserRolesHandler;
+use App\Administration\Domain\Exception\DernierRoleNonRetirableException;
+use App\Administration\Domain\Exception\RoleDejaAttribueException;
+use App\Administration\Domain\Exception\RoleNonAttribueException;
+use App\Administration\Domain\Exception\UserNotFoundException;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Infrastructure\Api\Resource\UserResource;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use App\Administration\Infrastructure\Security\UserVoter;
+use App\Shared\Domain\Clock;
+use App\Shared\Infrastructure\Tenant\TenantContext;
+
+use function in_array;
+
+use InvalidArgumentException;
+use Override;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+use Symfony\Component\Messenger\MessageBusInterface;
+use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;
+
+/**
+ * @implements ProcessorInterface<UserResource, UserResource>
+ */
+final readonly class UpdateUserRolesProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private UpdateUserRolesHandler $handler,
+        private MessageBusInterface $eventBus,
+        private AuthorizationCheckerInterface $authorizationChecker,
+        private TenantContext $tenantContext,
+        private Clock $clock,
+        private Security $security,
+    ) {
+    }
+
+    /**
+     * @param UserResource $data
+     */
+    #[Override]
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): UserResource
+    {
+        if (!$this->authorizationChecker->isGranted(UserVoter::MANAGE_ROLES)) {
+            throw new AccessDeniedHttpException('Vous n\'êtes pas autorisé à modifier les rôles.');
+        }
+
+        if (!$this->tenantContext->hasTenant()) {
+            throw new UnauthorizedHttpException('Bearer', 'Tenant non défini.');
+        }
+
+        /** @var string $userId */
+        $userId = $uriVariables['id'] ?? '';
+
+        /** @var string[] $roles */
+        $roles = $data->roles ?? [];
+
+        // Guard: prevent privilege escalation (only SUPER_ADMIN can assign SUPER_ADMIN)
+        $currentUser = $this->security->getUser();
+        if ($currentUser instanceof SecurityUser) {
+            $currentRoles = $currentUser->getRoles();
+
+            if (!in_array(Role::SUPER_ADMIN->value, $currentRoles, true)
+                && in_array(Role::SUPER_ADMIN->value, $roles, true)) {
+                throw new AccessDeniedHttpException('Seul un super administrateur peut attribuer le rôle SUPER_ADMIN.');
+            }
+
+            // Guard: prevent admin self-demotion
+            if ($currentUser->userId() === $userId) {
+                $isCurrentlyAdmin = in_array(Role::ADMIN->value, $currentRoles, true)
+                    || in_array(Role::SUPER_ADMIN->value, $currentRoles, true);
+                $willRemainAdmin = in_array(Role::ADMIN->value, $roles, true)
+                    || in_array(Role::SUPER_ADMIN->value, $roles, true);
+
+                if ($isCurrentlyAdmin && !$willRemainAdmin) {
+                    throw new BadRequestHttpException('Vous ne pouvez pas retirer votre propre rôle administrateur.');
+                }
+            }
+        }
+
+        try {
+            $command = new UpdateUserRolesCommand(
+                userId: $userId,
+                roles: $roles,
+                tenantId: (string) $this->tenantContext->getCurrentTenantId(),
+            );
+            $user = ($this->handler)($command);
+
+            // Domain events are collected by the aggregate during handler execution,
+            // then pulled and dispatched here. The handler does not dispatch events —
+            // this is the single dispatch point, not a double dispatch.
+            foreach ($user->pullDomainEvents() as $event) {
+                $this->eventBus->dispatch($event);
+            }
+
+            return UserResource::fromDomain($user, $this->clock->now());
+        } catch (UserNotFoundException $e) {
+            throw new NotFoundHttpException($e->getMessage());
+        } catch (InvalidArgumentException|RoleDejaAttribueException|RoleNonAttribueException|DernierRoleNonRetirableException $e) {
+            throw new BadRequestHttpException($e->getMessage());
+        }
+    }
+}

backend/src/Administration/Infrastructure/Api/Provider/MyRolesProvider.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Infrastructure\Api\Provider;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProviderInterface;
+use App\Administration\Application\Service\RoleContext;
+use App\Administration\Domain\Exception\UserNotFoundException;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\UserId;
+use App\Administration\Domain\Repository\UserRepository;
+use App\Administration\Infrastructure\Api\Resource\MyRolesOutput;
+use App\Administration\Infrastructure\Security\SecurityUser;
+
+use function array_map;
+
+use Override;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+
+/**
+ * @implements ProviderInterface<MyRolesOutput>
+ */
+final readonly class MyRolesProvider implements ProviderInterface
+{
+    public function __construct(
+        private Security $security,
+        private UserRepository $userRepository,
+        private RoleContext $roleContext,
+    ) {
+    }
+
+    #[Override]
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): MyRolesOutput
+    {
+        $currentUser = $this->security->getUser();
+        if (!$currentUser instanceof SecurityUser) {
+            throw new UnauthorizedHttpException('Bearer', 'Authentification requise.');
+        }
+
+        try {
+            $user = $this->userRepository->get(UserId::fromString($currentUser->userId()));
+        } catch (UserNotFoundException $e) {
+            throw new NotFoundHttpException($e->getMessage());
+        }
+
+        $activeRole = $this->roleContext->getActiveRole($user);
+
+        $output = new MyRolesOutput();
+        $output->roles = array_map(
+            static fn (Role $role) => ['value' => $role->value, 'label' => $role->label()],
+            $user->roles,
+        );
+        $output->activeRole = $activeRole->value;
+        $output->activeRoleLabel = $activeRole->label();
+
+        return $output;
+    }
+}

backend/src/Administration/Infrastructure/Api/Resource/MyRolesOutput.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Infrastructure\Api\Resource;
+
+use ApiPlatform\Metadata\ApiProperty;
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Get;
+use App\Administration\Infrastructure\Api\Provider\MyRolesProvider;
+
+#[ApiResource(
+    shortName: 'MyRoles',
+    operations: [
+        new Get(
+            uriTemplate: '/me/roles',
+            provider: MyRolesProvider::class,
+            name: 'get_my_roles',
+        ),
+    ],
+)]
+final class MyRolesOutput
+{
+    #[ApiProperty(identifier: true, readable: false)]
+    public string $id = 'me';
+
+    /** @var array<array{value: string, label: string}> */
+    public array $roles = [];
+
+    public string $activeRole = '';
+
+    public string $activeRoleLabel = '';
+}

backend/src/Administration/Infrastructure/Api/Resource/SwitchRoleInput.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Infrastructure\Api\Resource;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Post;
+use App\Administration\Infrastructure\Api\Processor\SwitchRoleProcessor;
+use Symfony\Component\Validator\Constraints as Assert;
+
+#[ApiResource(
+    shortName: 'SwitchRole',
+    operations: [
+        new Post(
+            uriTemplate: '/me/switch-role',
+            processor: SwitchRoleProcessor::class,
+            output: SwitchRoleOutput::class,
+            name: 'switch_role',
+        ),
+    ],
+)]
+final class SwitchRoleInput
+{
+    #[Assert\NotBlank(message: 'Le rôle est requis.')]
+    public ?string $role = null;
+}

backend/src/Administration/Infrastructure/Api/Resource/SwitchRoleOutput.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Infrastructure\Api\Resource;
+
+final readonly class SwitchRoleOutput
+{
+    public function __construct(
+        public string $activeRole,
+        public string $activeRoleLabel,
+    ) {
+    }
+}

backend/src/Administration/Infrastructure/Api/Resource/UserResource.php

@@ -9,12 +9,15 @@ use ApiPlatform\Metadata\ApiResource;
 use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\GetCollection;
 use ApiPlatform\Metadata\Post;
+use ApiPlatform\Metadata\Put;
 use App\Administration\Application\Query\GetUsers\UserDto;
+use App\Administration\Domain\Model\User\Role;
 use App\Administration\Domain\Model\User\User;
 use App\Administration\Infrastructure\Api\Processor\BlockUserProcessor;
 use App\Administration\Infrastructure\Api\Processor\InviteUserProcessor;
 use App\Administration\Infrastructure\Api\Processor\ResendInvitationProcessor;
 use App\Administration\Infrastructure\Api\Processor\UnblockUserProcessor;
+use App\Administration\Infrastructure\Api\Processor\UpdateUserRolesProcessor;
 use App\Administration\Infrastructure\Api\Provider\UserCollectionProvider;
 use App\Administration\Infrastructure\Api\Provider\UserItemProvider;
 use DateTimeImmutable;
@@ -24,6 +27,7 @@ use Symfony\Component\Validator\Constraints as Assert;
  * API Resource pour la gestion des utilisateurs.
  *
  * @see Story 2.5 - Création Comptes Utilisateurs
+ * @see Story 2.6 - Attribution des Rôles
  */
 #[ApiResource(
     shortName: 'User',
@@ -60,6 +64,13 @@ use Symfony\Component\Validator\Constraints as Assert;
             processor: UnblockUserProcessor::class,
             name: 'unblock_user',
         ),
+        new Put(
+            uriTemplate: '/users/{id}/roles',
+            read: false,
+            processor: UpdateUserRolesProcessor::class,
+            validationContext: ['groups' => ['Default', 'roles']],
+            name: 'update_user_roles',
+        ),
     ],
 )]
 final class UserResource
@@ -76,6 +87,11 @@ final class UserResource
 
     public ?string $roleLabel = null;
 
+    /** @var string[]|null */
+    #[Assert\NotBlank(message: 'Les rôles sont requis.', groups: ['roles'])]
+    #[Assert\Count(min: 1, minMessage: 'Au moins un rôle est requis.', groups: ['roles'])]
+    public ?array $roles = null;
+
     #[Assert\NotBlank(message: 'Le prénom est requis.', groups: ['create'])]
     public ?string $firstName = null;
 
@@ -107,6 +123,10 @@ final class UserResource
         $resource->email = (string) $user->email;
         $resource->role = $user->role->value;
         $resource->roleLabel = $user->role->label();
+        $resource->roles = array_map(
+            static fn (Role $r) => $r->value,
+            $user->roles,
+        );
         $resource->firstName = $user->firstName;
         $resource->lastName = $user->lastName;
         $resource->statut = $user->statut->value;
@@ -127,6 +147,7 @@ final class UserResource
         $resource->email = $dto->email;
         $resource->role = $dto->role;
         $resource->roleLabel = $dto->roleLabel;
+        $resource->roles = $dto->roles;
         $resource->firstName = $dto->firstName;
         $resource->lastName = $dto->lastName;
         $resource->statut = $dto->statut;

backend/src/Administration/Infrastructure/Console/CreateTestUserCommand.php

@@ -131,7 +131,7 @@ final class CreateTestUserCommand extends Command
         $user = User::reconstitute(
             id: UserId::generate(),
             email: new Email($email),
-            role: $role,
+            roles: [$role],
             tenantId: $tenantId,
             schoolName: $schoolName,
             statut: StatutCompte::ACTIF,

backend/src/Administration/Infrastructure/Persistence/Cache/CacheUserRepository.php

@@ -18,6 +18,9 @@ use DateTimeImmutable;
 use function in_array;
 
 use Psr\Cache\CacheItemPoolInterface;
+use RuntimeException;
+
+use function sprintf;
 
 /**
  * Cache-based UserRepository for development and testing.
@@ -71,7 +74,7 @@ final readonly class CacheUserRepository implements UserRepository
             return null;
         }
 
-        /** @var array{id: string, email: string, role: string, tenant_id: string, school_name: string, statut: string, hashed_password: string|null, date_naissance: string|null, created_at: string, activated_at: string|null, first_name?: string, last_name?: string, invited_at?: string|null, blocked_at?: string|null, blocked_reason?: string|null, consentement_parental: array{parent_id: string, eleve_id: string, date_consentement: string, ip_address: string}|null} $data */
+        /** @var array{id: string, email: string, roles?: string[], role?: string, tenant_id: string, school_name: string, statut: string, hashed_password: string|null, date_naissance: string|null, created_at: string, activated_at: string|null, first_name?: string, last_name?: string, invited_at?: string|null, blocked_at?: string|null, blocked_reason?: string|null, consentement_parental: array{parent_id: string, eleve_id: string, date_consentement: string, ip_address: string}|null} $data */
         $data = $item->get();
 
         return $this->deserialize($data);
@@ -136,7 +139,7 @@ final readonly class CacheUserRepository implements UserRepository
         return [
             'id' => (string) $user->id,
             'email' => (string) $user->email,
-            'role' => $user->role->value,
+            'roles' => array_map(static fn (Role $r) => $r->value, $user->roles),
             'tenant_id' => (string) $user->tenantId,
             'school_name' => $user->schoolName,
             'statut' => $user->statut->value,
@@ -162,7 +165,8 @@ final readonly class CacheUserRepository implements UserRepository
      * @param array{
      *     id: string,
      *     email: string,
-     *     role: string,
+     *     roles?: string[],
+     *     role?: string,
      *     tenant_id: string,
      *     school_name: string,
      *     statut: string,
@@ -194,10 +198,19 @@ final readonly class CacheUserRepository implements UserRepository
         $invitedAt = ($data['invited_at'] ?? null) !== null ? new DateTimeImmutable($data['invited_at']) : null;
         $blockedAt = ($data['blocked_at'] ?? null) !== null ? new DateTimeImmutable($data['blocked_at']) : null;
 
+        // Support both legacy single role and new multi-role format
+        $roleStrings = $data['roles'] ?? (isset($data['role']) ? [$data['role']] : []);
+
+        if ($roleStrings === []) {
+            throw new RuntimeException(sprintf('User %s has no roles in cache data.', $data['id']));
+        }
+
+        $roles = array_map(static fn (string $r) => Role::from($r), $roleStrings);
+
         return User::reconstitute(
             id: UserId::fromString($data['id']),
             email: new Email($data['email']),
-            role: Role::from($data['role']),
+            roles: $roles,
             tenantId: TenantId::fromString($data['tenant_id']),
             schoolName: $data['school_name'],
             statut: StatutCompte::from($data['statut']),

backend/src/Administration/Infrastructure/Security/LoginSuccessHandler.php

@@ -16,6 +16,7 @@ use App\Shared\Domain\Clock;
 use App\Shared\Domain\Tenant\TenantId;
 use App\Shared\Infrastructure\RateLimit\LoginRateLimiterInterface;
 use Lexik\Bundle\JWTAuthenticationBundle\Event\AuthenticationSuccessEvent;
+use Ramsey\Uuid\Uuid;
 use Symfony\Component\HttpFoundation\Cookie;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\Messenger\MessageBusInterface;
@@ -101,6 +102,16 @@ final readonly class LoginSuccessHandler
 
         $response->headers->setCookie($cookie);
 
+        // Session ID cookie for active role scoping (per-device isolation)
+        $sessionIdCookie = Cookie::create('classeo_sid')
+            ->withValue(Uuid::uuid4()->toString())
+            ->withExpires($refreshToken->expiresAt)
+            ->withPath('/api')
+            ->withSecure($isSecure)
+            ->withHttpOnly(true)
+            ->withSameSite($isSecure ? 'strict' : 'lax');
+        $response->headers->setCookie($sessionIdCookie);
+
         // Reset the rate limiter for this email
         $this->rateLimiter->reset($email);
 

backend/src/Administration/Infrastructure/Security/SecurityUserFactory.php

@@ -23,12 +23,10 @@ final readonly class SecurityUserFactory
             email: (string) $domainUser->email,
             hashedPassword: $domainUser->hashedPassword ?? '',
             tenantId: $domainUser->tenantId,
-            roles: [$this->mapRoleToSymfony($domainUser->role)],
+            roles: array_values(array_map(
+                static fn (Role $role) => $role->value,
+                $domainUser->roles,
+            )),
         );
     }
-
-    private function mapRoleToSymfony(Role $role): string
-    {
-        return $role->value;
-    }
 }

backend/src/Administration/Infrastructure/Security/UserVoter.php

@@ -30,6 +30,7 @@ final class UserVoter extends Voter
     public const string BLOCK = 'USER_BLOCK';
     public const string UNBLOCK = 'USER_UNBLOCK';
     public const string RESEND_INVITATION = 'USER_RESEND_INVITATION';
+    public const string MANAGE_ROLES = 'USER_MANAGE_ROLES';
 
     private const array SUPPORTED_ATTRIBUTES = [
         self::VIEW,
@@ -37,6 +38,7 @@ final class UserVoter extends Voter
         self::BLOCK,
         self::UNBLOCK,
         self::RESEND_INVITATION,
+        self::MANAGE_ROLES,
     ];
 
     #[Override]
@@ -66,7 +68,7 @@ final class UserVoter extends Voter
 
         return match ($attribute) {
             self::VIEW => $this->canView($roles),
-            self::CREATE, self::BLOCK, self::UNBLOCK, self::RESEND_INVITATION => $this->canManage($roles),
+            self::CREATE, self::BLOCK, self::UNBLOCK, self::RESEND_INVITATION, self::MANAGE_ROLES => $this->canManage($roles),
             default => false,
         };
     }

backend/src/Administration/Infrastructure/Service/CacheActiveRoleStore.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Administration\Infrastructure\Service;
+
+use App\Administration\Application\Port\ActiveRoleStore;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+
+use function is_string;
+
+use Psr\Cache\CacheItemPoolInterface;
+
+use function sprintf;
+
+use Symfony\Component\HttpFoundation\RequestStack;
+
+final readonly class CacheActiveRoleStore implements ActiveRoleStore
+{
+    private const string CACHE_KEY_PREFIX = 'active_role_';
+    private const int TTL_SECONDS = 604_800; // 7 jours
+
+    public function __construct(
+        private CacheItemPoolInterface $sessionsCache,
+        private RequestStack $requestStack,
+    ) {
+    }
+
+    public function store(User $user, Role $role): void
+    {
+        $item = $this->sessionsCache->getItem($this->cacheKey($user));
+        $item->set($role->value);
+        $item->expiresAfter(self::TTL_SECONDS);
+        $this->sessionsCache->save($item);
+    }
+
+    public function get(User $user): ?Role
+    {
+        $item = $this->sessionsCache->getItem($this->cacheKey($user));
+
+        if (!$item->isHit()) {
+            return null;
+        }
+
+        $stored = $item->get();
+        if (!is_string($stored)) {
+            return null;
+        }
+
+        $role = Role::tryFrom($stored);
+        if ($role !== null && $user->aLeRole($role)) {
+            return $role;
+        }
+
+        return null;
+    }
+
+    public function clear(User $user): void
+    {
+        $this->sessionsCache->deleteItem($this->cacheKey($user));
+    }
+
+    private function cacheKey(User $user): string
+    {
+        $sessionId = $this->requestStack->getCurrentRequest()?->cookies->get('classeo_sid', '') ?? '';
+
+        return sprintf('%s%s:%s', self::CACHE_KEY_PREFIX, $user->id, $sessionId);
+    }
+}

backend/tests/Unit/Administration/Application/Command/AssignRoleHandlerTest.php

@@ -0,0 +1,116 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Administration\Application\Command;
+
+use App\Administration\Application\Command\AssignRole\AssignRoleCommand;
+use App\Administration\Application\Command\AssignRole\AssignRoleHandler;
+use App\Administration\Domain\Event\RoleAttribue;
+use App\Administration\Domain\Exception\RoleDejaAttribueException;
+use App\Administration\Domain\Model\User\Email;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use App\Administration\Infrastructure\Persistence\InMemory\InMemoryUserRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use InvalidArgumentException;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class AssignRoleHandlerTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440002';
+
+    private InMemoryUserRepository $userRepository;
+    private AssignRoleHandler $handler;
+
+    protected function setUp(): void
+    {
+        $this->userRepository = new InMemoryUserRepository();
+
+        $clock = new class implements Clock {
+            public function now(): DateTimeImmutable
+            {
+                return new DateTimeImmutable('2026-02-08 10:00:00');
+            }
+        };
+
+        $this->handler = new AssignRoleHandler($this->userRepository, $clock);
+    }
+
+    #[Test]
+    public function itAssignsRoleToUser(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $result = ($this->handler)(new AssignRoleCommand(
+            userId: (string) $user->id,
+            role: Role::PARENT->value,
+        ));
+
+        self::assertTrue($result->aLeRole(Role::PROF));
+        self::assertTrue($result->aLeRole(Role::PARENT));
+    }
+
+    #[Test]
+    public function itRecordsRoleAttribueEvent(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+        $user->pullDomainEvents();
+
+        ($this->handler)(new AssignRoleCommand(
+            userId: (string) $user->id,
+            role: Role::PARENT->value,
+        ));
+
+        $savedUser = $this->userRepository->get($user->id);
+        $events = $savedUser->pullDomainEvents();
+
+        self::assertCount(1, $events);
+        self::assertInstanceOf(RoleAttribue::class, $events[0]);
+    }
+
+    #[Test]
+    public function itThrowsWhenRoleAlreadyAssigned(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $this->expectException(RoleDejaAttribueException::class);
+
+        ($this->handler)(new AssignRoleCommand(
+            userId: (string) $user->id,
+            role: Role::PROF->value,
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenRoleIsInvalid(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $this->expectException(InvalidArgumentException::class);
+
+        ($this->handler)(new AssignRoleCommand(
+            userId: (string) $user->id,
+            role: 'ROLE_INVALID',
+        ));
+    }
+
+    private function createUser(Role $role): User
+    {
+        return User::creer(
+            email: new Email('user@example.com'),
+            role: $role,
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            schoolName: 'École Alpha',
+            dateNaissance: null,
+            createdAt: new DateTimeImmutable('2026-01-15 10:00:00'),
+        );
+    }
+}

backend/tests/Unit/Administration/Application/Command/RemoveRoleHandlerTest.php

@@ -0,0 +1,126 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Administration\Application\Command;
+
+use App\Administration\Application\Command\RemoveRole\RemoveRoleCommand;
+use App\Administration\Application\Command\RemoveRole\RemoveRoleHandler;
+use App\Administration\Domain\Event\RoleRetire;
+use App\Administration\Domain\Exception\DernierRoleNonRetirableException;
+use App\Administration\Domain\Exception\RoleNonAttribueException;
+use App\Administration\Domain\Model\User\Email;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use App\Administration\Infrastructure\Persistence\InMemory\InMemoryUserRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class RemoveRoleHandlerTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440002';
+
+    private InMemoryUserRepository $userRepository;
+    private RemoveRoleHandler $handler;
+
+    protected function setUp(): void
+    {
+        $this->userRepository = new InMemoryUserRepository();
+
+        $clock = new class implements Clock {
+            public function now(): DateTimeImmutable
+            {
+                return new DateTimeImmutable('2026-02-08 10:00:00');
+            }
+        };
+
+        $this->handler = new RemoveRoleHandler($this->userRepository, $clock);
+    }
+
+    #[Test]
+    public function itRemovesRoleFromUser(): void
+    {
+        $user = $this->createUserWithRoles(Role::PROF, Role::PARENT);
+        $this->userRepository->save($user);
+
+        $result = ($this->handler)(new RemoveRoleCommand(
+            userId: (string) $user->id,
+            role: Role::PARENT->value,
+        ));
+
+        self::assertTrue($result->aLeRole(Role::PROF));
+        self::assertFalse($result->aLeRole(Role::PARENT));
+    }
+
+    #[Test]
+    public function itRecordsRoleRetireEvent(): void
+    {
+        $user = $this->createUserWithRoles(Role::PROF, Role::PARENT);
+        $this->userRepository->save($user);
+        $user->pullDomainEvents();
+
+        ($this->handler)(new RemoveRoleCommand(
+            userId: (string) $user->id,
+            role: Role::PARENT->value,
+        ));
+
+        $savedUser = $this->userRepository->get($user->id);
+        $events = $savedUser->pullDomainEvents();
+
+        self::assertCount(1, $events);
+        self::assertInstanceOf(RoleRetire::class, $events[0]);
+    }
+
+    #[Test]
+    public function itThrowsWhenRoleNotAssigned(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $this->expectException(RoleNonAttribueException::class);
+
+        ($this->handler)(new RemoveRoleCommand(
+            userId: (string) $user->id,
+            role: Role::PARENT->value,
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenRemovingLastRole(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $this->expectException(DernierRoleNonRetirableException::class);
+
+        ($this->handler)(new RemoveRoleCommand(
+            userId: (string) $user->id,
+            role: Role::PROF->value,
+        ));
+    }
+
+    private function createUser(Role $role): User
+    {
+        return User::creer(
+            email: new Email('user@example.com'),
+            role: $role,
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            schoolName: 'École Alpha',
+            dateNaissance: null,
+            createdAt: new DateTimeImmutable('2026-01-15 10:00:00'),
+        );
+    }
+
+    private function createUserWithRoles(Role $role, Role ...$additionalRoles): User
+    {
+        $user = $this->createUser($role);
+        foreach ($additionalRoles as $r) {
+            $user->attribuerRole($r, new DateTimeImmutable());
+        }
+
+        return $user;
+    }
+}

backend/tests/Unit/Administration/Application/Command/UpdateUserRolesHandlerTest.php

@@ -0,0 +1,119 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Administration\Application\Command;
+
+use App\Administration\Application\Command\UpdateUserRoles\UpdateUserRolesCommand;
+use App\Administration\Application\Command\UpdateUserRoles\UpdateUserRolesHandler;
+use App\Administration\Application\Port\ActiveRoleStore;
+use App\Administration\Domain\Model\User\Email;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use App\Administration\Infrastructure\Persistence\InMemory\InMemoryUserRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use InvalidArgumentException;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class UpdateUserRolesHandlerTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440002';
+
+    private InMemoryUserRepository $userRepository;
+    private UpdateUserRolesHandler $handler;
+    private ActiveRoleStore $activeRoleStore;
+
+    protected function setUp(): void
+    {
+        $this->userRepository = new InMemoryUserRepository();
+
+        $clock = new class implements Clock {
+            public function now(): DateTimeImmutable
+            {
+                return new DateTimeImmutable('2026-02-08 10:00:00');
+            }
+        };
+
+        $this->activeRoleStore = $this->createMock(ActiveRoleStore::class);
+
+        $this->handler = new UpdateUserRolesHandler($this->userRepository, $clock, $this->activeRoleStore);
+    }
+
+    #[Test]
+    public function itUpdatesRolesBulk(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $result = ($this->handler)(new UpdateUserRolesCommand(
+            userId: (string) $user->id,
+            roles: [Role::PARENT->value, Role::VIE_SCOLAIRE->value],
+        ));
+
+        self::assertFalse($result->aLeRole(Role::PROF));
+        self::assertTrue($result->aLeRole(Role::PARENT));
+        self::assertTrue($result->aLeRole(Role::VIE_SCOLAIRE));
+    }
+
+    #[Test]
+    public function itKeepsExistingRolesIfInTargetList(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $user->attribuerRole(Role::PARENT, new DateTimeImmutable());
+        $this->userRepository->save($user);
+
+        $result = ($this->handler)(new UpdateUserRolesCommand(
+            userId: (string) $user->id,
+            roles: [Role::PROF->value, Role::PARENT->value, Role::ADMIN->value],
+        ));
+
+        self::assertTrue($result->aLeRole(Role::PROF));
+        self::assertTrue($result->aLeRole(Role::PARENT));
+        self::assertTrue($result->aLeRole(Role::ADMIN));
+        self::assertCount(3, $result->roles);
+    }
+
+    #[Test]
+    public function itThrowsWhenEmptyRoles(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('Au moins un rôle est requis.');
+
+        ($this->handler)(new UpdateUserRolesCommand(
+            userId: (string) $user->id,
+            roles: [],
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenInvalidRole(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $this->userRepository->save($user);
+
+        $this->expectException(InvalidArgumentException::class);
+
+        ($this->handler)(new UpdateUserRolesCommand(
+            userId: (string) $user->id,
+            roles: ['ROLE_INVALID'],
+        ));
+    }
+
+    private function createUser(Role $role): User
+    {
+        return User::creer(
+            email: new Email('user@example.com'),
+            role: $role,
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            schoolName: 'École Alpha',
+            dateNaissance: null,
+            createdAt: new DateTimeImmutable('2026-01-15 10:00:00'),
+        );
+    }
+}

backend/tests/Unit/Administration/Application/Service/RoleContextTest.php

@@ -0,0 +1,139 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Administration\Application\Service;
+
+use App\Administration\Application\Port\ActiveRoleStore;
+use App\Administration\Application\Service\RoleContext;
+use App\Administration\Domain\Exception\RoleNonAttribueException;
+use App\Administration\Domain\Model\User\Email;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\StatutCompte;
+use App\Administration\Domain\Model\User\User;
+use App\Administration\Domain\Model\User\UserId;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use DomainException;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class RoleContextTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440002';
+
+    private InMemoryActiveRoleStore $store;
+    private RoleContext $roleContext;
+
+    protected function setUp(): void
+    {
+        $this->store = new InMemoryActiveRoleStore();
+        $this->roleContext = new RoleContext($this->store);
+    }
+
+    #[Test]
+    public function itReturnsPrimaryRoleWhenNoActiveRoleStored(): void
+    {
+        $user = $this->createUser(Role::PROF);
+
+        self::assertSame(Role::PROF, $this->roleContext->getActiveRole($user));
+    }
+
+    #[Test]
+    public function itSwitchesToAnotherRole(): void
+    {
+        $user = $this->createActiveUser(Role::PROF);
+        $user->attribuerRole(Role::ADMIN, new DateTimeImmutable());
+
+        $this->roleContext->switchTo($user, Role::ADMIN);
+
+        self::assertSame(Role::ADMIN, $this->roleContext->getActiveRole($user));
+    }
+
+    #[Test]
+    public function itThrowsWhenSwitchingToUnassignedRole(): void
+    {
+        $user = $this->createActiveUser(Role::PROF);
+
+        $this->expectException(RoleNonAttribueException::class);
+
+        $this->roleContext->switchTo($user, Role::ADMIN);
+    }
+
+    #[Test]
+    public function itClearsActiveRole(): void
+    {
+        $user = $this->createActiveUser(Role::PROF);
+        $user->attribuerRole(Role::ADMIN, new DateTimeImmutable());
+
+        $this->roleContext->switchTo($user, Role::ADMIN);
+        $this->roleContext->clear($user);
+
+        self::assertSame(Role::PROF, $this->roleContext->getActiveRole($user));
+    }
+
+    #[Test]
+    public function itThrowsWhenAccountIsNotActive(): void
+    {
+        $user = $this->createActiveUser(Role::PROF);
+        $user->attribuerRole(Role::ADMIN, new DateTimeImmutable());
+        $user->bloquer('Test', new DateTimeImmutable());
+
+        $this->expectException(DomainException::class);
+
+        $this->roleContext->switchTo($user, Role::ADMIN);
+    }
+
+    private function createUser(Role $role): User
+    {
+        return User::creer(
+            email: new Email('user@example.com'),
+            role: $role,
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            schoolName: 'École Test',
+            dateNaissance: null,
+            createdAt: new DateTimeImmutable('2026-01-15 10:00:00'),
+        );
+    }
+
+    private function createActiveUser(Role $role): User
+    {
+        return User::reconstitute(
+            id: UserId::generate(),
+            email: new Email('active@example.com'),
+            roles: [$role],
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            schoolName: 'École Test',
+            statut: StatutCompte::ACTIF,
+            dateNaissance: null,
+            createdAt: new DateTimeImmutable('2026-01-15 10:00:00'),
+            hashedPassword: 'hashed',
+            activatedAt: new DateTimeImmutable('2026-01-16 10:00:00'),
+            consentementParental: null,
+        );
+    }
+}
+
+/**
+ * @internal
+ */
+final class InMemoryActiveRoleStore implements ActiveRoleStore
+{
+    /** @var array<string, Role> */
+    private array $roles = [];
+
+    public function store(User $user, Role $role): void
+    {
+        $this->roles[(string) $user->id] = $role;
+    }
+
+    public function get(User $user): ?Role
+    {
+        return $this->roles[(string) $user->id] ?? null;
+    }
+
+    public function clear(User $user): void
+    {
+        unset($this->roles[(string) $user->id]);
+    }
+}

backend/tests/Unit/Administration/Domain/Model/User/UserInvitationTest.php

@@ -176,7 +176,7 @@ final class UserInvitationTest extends TestCase
         $user = User::reconstitute(
             id: UserId::generate(),
             email: new Email('minor@example.com'),
-            role: Role::ELEVE,
+            roles: [Role::ELEVE],
             tenantId: TenantId::fromString(self::TENANT_ID),
             schoolName: self::SCHOOL_NAME,
             statut: StatutCompte::CONSENTEMENT_REQUIS,

backend/tests/Unit/Administration/Domain/Model/User/UserRoleTest.php

@@ -0,0 +1,156 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Administration\Domain\Model\User;
+
+use App\Administration\Domain\Event\RoleAttribue;
+use App\Administration\Domain\Event\RoleRetire;
+use App\Administration\Domain\Exception\DernierRoleNonRetirableException;
+use App\Administration\Domain\Exception\RoleDejaAttribueException;
+use App\Administration\Domain\Exception\RoleNonAttribueException;
+use App\Administration\Domain\Model\User\Email;
+use App\Administration\Domain\Model\User\Role;
+use App\Administration\Domain\Model\User\User;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class UserRoleTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440002';
+    private const string SCHOOL_NAME = 'École Alpha';
+
+    #[Test]
+    public function userIsCreatedWithSingleRole(): void
+    {
+        $user = $this->createUser(Role::PROF);
+
+        self::assertSame([Role::PROF], $user->roles);
+    }
+
+    #[Test]
+    public function attribuerRoleAddsRoleToUser(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $user->pullDomainEvents();
+
+        $user->attribuerRole(Role::PARENT, new DateTimeImmutable('2026-02-08 10:00:00'));
+
+        self::assertContains(Role::PROF, $user->roles);
+        self::assertContains(Role::PARENT, $user->roles);
+        self::assertCount(2, $user->roles);
+    }
+
+    #[Test]
+    public function attribuerRoleRecordsRoleAttribueEvent(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $user->pullDomainEvents();
+
+        $user->attribuerRole(Role::PARENT, new DateTimeImmutable('2026-02-08 10:00:00'));
+
+        $events = $user->pullDomainEvents();
+        self::assertCount(1, $events);
+        self::assertInstanceOf(RoleAttribue::class, $events[0]);
+    }
+
+    #[Test]
+    public function attribuerRoleThrowsWhenRoleAlreadyAssigned(): void
+    {
+        $user = $this->createUser(Role::PROF);
+
+        $this->expectException(RoleDejaAttribueException::class);
+
+        $user->attribuerRole(Role::PROF, new DateTimeImmutable());
+    }
+
+    #[Test]
+    public function retirerRoleRemovesRoleFromUser(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $user->attribuerRole(Role::PARENT, new DateTimeImmutable());
+        $user->pullDomainEvents();
+
+        $user->retirerRole(Role::PARENT, new DateTimeImmutable('2026-02-08 10:00:00'));
+
+        self::assertSame([Role::PROF], $user->roles);
+    }
+
+    #[Test]
+    public function retirerRoleRecordsRoleRetireEvent(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $user->attribuerRole(Role::PARENT, new DateTimeImmutable());
+        $user->pullDomainEvents();
+
+        $user->retirerRole(Role::PARENT, new DateTimeImmutable('2026-02-08 10:00:00'));
+
+        $events = $user->pullDomainEvents();
+        self::assertCount(1, $events);
+        self::assertInstanceOf(RoleRetire::class, $events[0]);
+    }
+
+    #[Test]
+    public function retirerRoleThrowsWhenRoleNotAssigned(): void
+    {
+        $user = $this->createUser(Role::PROF);
+
+        $this->expectException(RoleNonAttribueException::class);
+
+        $user->retirerRole(Role::PARENT, new DateTimeImmutable());
+    }
+
+    #[Test]
+    public function retirerRoleThrowsWhenLastRole(): void
+    {
+        $user = $this->createUser(Role::PROF);
+
+        $this->expectException(DernierRoleNonRetirableException::class);
+
+        $user->retirerRole(Role::PROF, new DateTimeImmutable());
+    }
+
+    #[Test]
+    public function userCanHaveMultipleRoles(): void
+    {
+        $user = $this->createUser(Role::PROF);
+        $user->attribuerRole(Role::PARENT, new DateTimeImmutable());
+        $user->attribuerRole(Role::VIE_SCOLAIRE, new DateTimeImmutable());
+
+        self::assertCount(3, $user->roles);
+        self::assertContains(Role::PROF, $user->roles);
+        self::assertContains(Role::PARENT, $user->roles);
+        self::assertContains(Role::VIE_SCOLAIRE, $user->roles);
+    }
+
+    #[Test]
+    public function aLeRoleReturnsTrueForAssignedRole(): void
+    {
+        $user = $this->createUser(Role::PROF);
+
+        self::assertTrue($user->aLeRole(Role::PROF));
+        self::assertFalse($user->aLeRole(Role::PARENT));
+    }
+
+    #[Test]
+    public function rolePrincipalReturnsFirstRole(): void
+    {
+        $user = $this->createUser(Role::PROF);
+
+        self::assertSame(Role::PROF, $user->rolePrincipal());
+    }
+
+    private function createUser(Role $role = Role::PARENT): User
+    {
+        return User::creer(
+            email: new Email('user@example.com'),
+            role: $role,
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            schoolName: self::SCHOOL_NAME,
+            dateNaissance: null,
+            createdAt: new DateTimeImmutable('2026-01-15 10:00:00'),
+        );
+    }
+}

backend/tests/Unit/Administration/Infrastructure/Api/Controller/LogoutControllerTest.php

@@ -200,10 +200,13 @@ final class LogoutControllerTest extends TestCase
 
         // THEN: Cookies are cleared (expired)
         $cookies = $response->headers->getCookies();
-        $this->assertCount(2, $cookies); // /api and /api/token (legacy)
+        $this->assertCount(3, $cookies); // refresh_token /api, /api/token (legacy), classeo_sid
+
+        $cookieNames = array_map(static fn ($c) => $c->getName(), $cookies);
+        $this->assertContains('refresh_token', $cookieNames);
+        $this->assertContains('classeo_sid', $cookieNames);
 
         foreach ($cookies as $cookie) {
-            $this->assertSame('refresh_token', $cookie->getName());
             $this->assertSame('', $cookie->getValue());
             $this->assertTrue($cookie->isCleared()); // Expiry in the past
         }

backend/tests/Unit/Administration/Infrastructure/Console/CreateTestActivationTokenCommandTest.php

@@ -185,7 +185,7 @@ final class CreateTestActivationTokenCommandTest extends TestCase
         return User::reconstitute(
             id: UserId::generate(),
             email: new Email($email),
-            role: Role::PARENT,
+            roles: [Role::PARENT],
             tenantId: TenantId::fromString(self::TENANT_ID),
             schoolName: 'École Test',
             statut: StatutCompte::ACTIF,

backend/tests/Unit/Administration/Infrastructure/Security/DatabaseUserProviderTest.php

@@ -226,7 +226,7 @@ final class DatabaseUserProviderTest extends TestCase
         return User::reconstitute(
             id: UserId::generate(),
             email: new Email('user@example.com'),
-            role: Role::PARENT,
+            roles: [Role::PARENT],
             tenantId: $tenantId,
             schoolName: 'École Test',
             statut: $statut,

backend/tests/Unit/Administration/Infrastructure/Security/LoginSuccessHandlerTest.php

@@ -133,12 +133,12 @@ final class LoginSuccessHandlerTest extends TestCase
         // WHEN: Handler processes the event
         $this->handler->onAuthenticationSuccess($event);
 
-        // THEN: Refresh token cookie is set
+        // THEN: Refresh token cookie and session ID cookie are set
         $cookies = $response->headers->getCookies();
-        $this->assertCount(1, $cookies);
+        $this->assertCount(2, $cookies);
-        $this->assertSame('refresh_token', $cookies[0]->getName());
+        $cookieNames = array_map(static fn ($c) => $c->getName(), $cookies);
-        $this->assertTrue($cookies[0]->isHttpOnly());
+        $this->assertContains('refresh_token', $cookieNames);
-        $this->assertSame('/api', $cookies[0]->getPath());
+        $this->assertContains('classeo_sid', $cookieNames);
 
         // THEN: Refresh token is saved in repository
         $this->assertTrue(
@@ -304,10 +304,12 @@ final class LoginSuccessHandlerTest extends TestCase
         // WHEN: Handler processes the event
         $this->handler->onAuthenticationSuccess($event);
 
-        // THEN: Cookie is NOT marked as secure (HTTP)
+        // THEN: Cookies are NOT marked as secure (HTTP)
         $cookies = $response->headers->getCookies();
-        $this->assertCount(1, $cookies);
+        $this->assertCount(2, $cookies);
-        $this->assertFalse($cookies[0]->isSecure());
+        foreach ($cookies as $cookie) {
+            $this->assertFalse($cookie->isSecure());
+        }
     }
 
     private function createRequest(): Request

backend/tests/Unit/Administration/Infrastructure/Security/SecurityUserTest.php

@@ -84,7 +84,7 @@ final class SecurityUserTest extends TestCase
         return User::reconstitute(
             id: UserId::generate(),
             email: new Email('user@example.com'),
-            role: $role,
+            roles: [$role],
             tenantId: TenantId::fromString(self::TENANT_ID),
             schoolName: 'École Test',
             statut: StatutCompte::ACTIF,

backend/tests/Unit/Administration/Infrastructure/Security/UserVoterTest.php

@@ -121,6 +121,48 @@ final class UserVoterTest extends TestCase
         self::assertSame(UserVoter::ACCESS_DENIED, $result);
     }
 
+    #[Test]
+    public function itGrantsManageRolesToAdmin(): void
+    {
+        $result = $this->voteWithRole('ROLE_ADMIN', UserVoter::MANAGE_ROLES);
+        self::assertSame(UserVoter::ACCESS_GRANTED, $result);
+    }
+
+    #[Test]
+    public function itGrantsManageRolesToSuperAdmin(): void
+    {
+        $result = $this->voteWithRole('ROLE_SUPER_ADMIN', UserVoter::MANAGE_ROLES);
+        self::assertSame(UserVoter::ACCESS_GRANTED, $result);
+    }
+
+    #[Test]
+    public function itDeniesManageRolesToProf(): void
+    {
+        $result = $this->voteWithRole('ROLE_PROF', UserVoter::MANAGE_ROLES);
+        self::assertSame(UserVoter::ACCESS_DENIED, $result);
+    }
+
+    #[Test]
+    public function itDeniesManageRolesToSecretariat(): void
+    {
+        $result = $this->voteWithRole('ROLE_SECRETARIAT', UserVoter::MANAGE_ROLES);
+        self::assertSame(UserVoter::ACCESS_DENIED, $result);
+    }
+
+    #[Test]
+    public function itGrantsResendInvitationToAdmin(): void
+    {
+        $result = $this->voteWithRole('ROLE_ADMIN', UserVoter::RESEND_INVITATION);
+        self::assertSame(UserVoter::ACCESS_GRANTED, $result);
+    }
+
+    #[Test]
+    public function itDeniesResendInvitationToProf(): void
+    {
+        $result = $this->voteWithRole('ROLE_PROF', UserVoter::RESEND_INVITATION);
+        self::assertSame(UserVoter::ACCESS_DENIED, $result);
+    }
+
     private function voteWithRole(string $role, string $attribute): int
     {
         $user = $this->createMock(UserInterface::class);

frontend/e2e/pedagogy.spec.ts

@@ -69,16 +69,11 @@ test.describe('Pedagogy - Grading Mode Configuration (Story 2.4)', () => {
 		await expect(page).toHaveURL(/\/admin\/pedagogy/, { timeout: 10000 });
 	});
 
-	test('pedagogy card is visible on admin dashboard', async ({ page, browserName }) => {
+	test('pedagogy card is visible on admin dashboard', async ({ page }) => {
-		// Svelte 5 delegated onclick is not triggered by Playwright click on webkit
-		test.skip(browserName === 'webkit', 'Demo role switcher click not supported on webkit');
-
 		await loginAsAdmin(page);
 
-		// Switch to admin view in demo dashboard
+		// Authenticated admin sees admin dashboard directly via role context
 		await page.goto(`${ALPHA_URL}/dashboard`);
-		const adminButton = page.getByRole('button', { name: /admin/i });
-		await adminButton.click();
 
 		await expect(page.getByRole('heading', { name: /administration/i })).toBeVisible({
 			timeout: 10000

frontend/src/lib/components/organisms/RoleSwitcher/RoleSwitcher.svelte

@@ -0,0 +1,113 @@
+<script lang="ts">
+	import {
+		getRoles,
+		getActiveRole,
+		hasMultipleRoles,
+		switchTo,
+		getIsSwitching
+	} from '$features/roles/roleContext.svelte';
+
+	let selectedRole = $state(getActiveRole() ?? '');
+	let switchError = $state<string | null>(null);
+
+	// Sync selected role when active role changes externally
+	$effect(() => {
+		const active = getActiveRole();
+		if (active) {
+			selectedRole = active;
+		}
+	});
+
+	async function handleSwitch() {
+		if (selectedRole === getActiveRole()) return;
+
+		switchError = null;
+		const success = await switchTo(selectedRole);
+
+		if (!success) {
+			switchError = 'Erreur lors du basculement';
+			selectedRole = getActiveRole() ?? '';
+		}
+	}
+</script>
+
+{#if hasMultipleRoles()}
+	<div class="role-switcher">
+		<label for="role-switcher" class="role-switcher-label">Vue :</label>
+		<select
+			id="role-switcher"
+			bind:value={selectedRole}
+			onchange={handleSwitch}
+			disabled={getIsSwitching()}
+			class="role-switcher-select"
+		>
+			{#each getRoles() as role}
+				<option value={role.value}>{role.label}</option>
+			{/each}
+		</select>
+		{#if getIsSwitching()}
+			<span class="role-switcher-spinner"></span>
+		{/if}
+		{#if switchError}
+			<span class="role-switcher-error">{switchError}</span>
+		{/if}
+	</div>
+{/if}
+
+<style>
+	.role-switcher {
+		display: flex;
+		align-items: center;
+		gap: 0.5rem;
+	}
+
+	.role-switcher-label {
+		font-size: 0.75rem;
+		font-weight: 500;
+		color: var(--text-secondary, #64748b);
+		white-space: nowrap;
+	}
+
+	.role-switcher-select {
+		padding: 0.375rem 0.75rem;
+		font-size: 0.8125rem;
+		font-weight: 500;
+		color: var(--accent-primary, #0ea5e9);
+		background: var(--accent-primary-light, #e0f2fe);
+		border: 1px solid var(--accent-primary, #0ea5e9);
+		border-radius: 0.5rem;
+		cursor: pointer;
+		transition: all 0.2s;
+		appearance: auto;
+	}
+
+	.role-switcher-select:hover:not(:disabled) {
+		background: var(--accent-primary, #0ea5e9);
+		color: white;
+	}
+
+	.role-switcher-select:disabled {
+		opacity: 0.6;
+		cursor: not-allowed;
+	}
+
+	.role-switcher-spinner {
+		width: 14px;
+		height: 14px;
+		border: 2px solid var(--border-subtle, #e2e8f0);
+		border-top-color: var(--accent-primary, #0ea5e9);
+		border-radius: 50%;
+		animation: spin 0.8s linear infinite;
+	}
+
+	.role-switcher-error {
+		font-size: 0.75rem;
+		color: var(--color-alert, #ef4444);
+	}
+
+	@keyframes spin {
+		to {
+			transform: rotate(360deg);
+		}
+	}
+</style>

frontend/src/lib/features/roles/api/roles.ts

@@ -0,0 +1,86 @@
+import { getApiBaseUrl } from '$lib/api';
+import { authenticatedFetch } from '$lib/auth';
+
+/**
+ * Types pour la gestion des rôles utilisateur.
+ *
+ * @see Story 2.6 - Attribution des rôles
+ */
+export interface RoleInfo {
+	value: string;
+	label: string;
+}
+
+export interface MyRolesResponse {
+	roles: RoleInfo[];
+	activeRole: string;
+	activeRoleLabel: string;
+}
+
+export interface SwitchRoleResponse {
+	activeRole: string;
+	activeRoleLabel: string;
+}
+
+/**
+ * Récupère les rôles de l'utilisateur courant et le rôle actif.
+ */
+export async function getMyRoles(): Promise<MyRolesResponse> {
+	const apiUrl = getApiBaseUrl();
+	const response = await authenticatedFetch(`${apiUrl}/me/roles`);
+
+	if (!response.ok) {
+		throw new Error('Failed to fetch roles');
+	}
+
+	return await response.json();
+}
+
+/**
+ * Bascule le contexte vers un autre rôle.
+ */
+export async function switchRole(role: string): Promise<SwitchRoleResponse> {
+	const apiUrl = getApiBaseUrl();
+	const response = await authenticatedFetch(`${apiUrl}/me/switch-role`, {
+		method: 'POST',
+		headers: {
+			'Content-Type': 'application/json'
+		},
+		body: JSON.stringify({ role })
+	});
+
+	if (!response.ok) {
+		throw new Error('Failed to switch role');
+	}
+
+	return await response.json();
+}
+
+/**
+ * Met à jour les rôles d'un utilisateur (admin uniquement).
+ */
+export async function updateUserRoles(userId: string, roles: string[]): Promise<void> {
+	const apiUrl = getApiBaseUrl();
+	const response = await authenticatedFetch(`${apiUrl}/users/${userId}/roles`, {
+		method: 'PUT',
+		headers: {
+			'Content-Type': 'application/json'
+		},
+		body: JSON.stringify({ roles })
+	});
+
+	if (!response.ok) {
+		let errorMessage = `Erreur lors de la mise à jour des rôles (${response.status})`;
+		try {
+			const errorData = await response.json();
+			if (errorData['hydra:description']) {
+				errorMessage = errorData['hydra:description'];
+			} else if (errorData.detail) {
+				errorMessage = errorData.detail;
+			}
+		} catch {
+			// JSON parsing failed, keep default message
+		}
+		throw new Error(errorMessage);
+	}
+}

frontend/src/lib/features/roles/roleContext.svelte.ts

@@ -0,0 +1,111 @@
+import { getMyRoles, switchRole as apiSwitchRole, type RoleInfo } from './api/roles';
+
+/**
+ * Contexte de rôle réactif.
+ *
+ * Gère le rôle actif de l'utilisateur lorsqu'il possède plusieurs rôles (FR5).
+ * Le rôle actif détermine quelle vue (dashboard, navigation) est affichée.
+ *
+ * @see Story 2.6 - Attribution des rôles
+ */
+
+// État réactif
+let roles = $state<RoleInfo[]>([]);
+let activeRole = $state<string | null>(null);
+let activeRoleLabel = $state<string | null>(null);
+let isLoading = $state(false);
+let isSwitching = $state(false);
+let isFetched = $state(false);
+
+/**
+ * Charge les rôles de l'utilisateur courant depuis l'API.
+ * Protégé contre les appels multiples (guard isFetched).
+ */
+export async function fetchRoles(): Promise<void> {
+	if (isFetched || isLoading) return;
+
+	isLoading = true;
+	try {
+		const data = await getMyRoles();
+		roles = data.roles;
+		activeRole = data.activeRole;
+		activeRoleLabel = data.activeRoleLabel;
+		isFetched = true;
+	} catch (error) {
+		console.error('[roleContext] Failed to fetch roles:', error);
+	} finally {
+		isLoading = false;
+	}
+}
+
+/**
+ * Bascule vers un autre rôle.
+ */
+export async function switchTo(role: string): Promise<boolean> {
+	if (role === activeRole) return true;
+
+	isSwitching = true;
+	try {
+		const data = await apiSwitchRole(role);
+		activeRole = data.activeRole;
+		activeRoleLabel = data.activeRoleLabel;
+		return true;
+	} catch (error) {
+		console.error('[roleContext] Failed to switch role:', error);
+		return false;
+	} finally {
+		isSwitching = false;
+	}
+}
+
+/**
+ * Indique si l'utilisateur a plusieurs rôles (et donc peut basculer).
+ */
+export function hasMultipleRoles(): boolean {
+	return roles.length > 1;
+}
+
+/**
+ * Retourne les rôles disponibles.
+ */
+export function getRoles(): RoleInfo[] {
+	return roles;
+}
+
+/**
+ * Retourne le rôle actif.
+ */
+export function getActiveRole(): string | null {
+	return activeRole;
+}
+
+/**
+ * Retourne le libellé du rôle actif.
+ */
+export function getActiveRoleLabel(): string | null {
+	return activeRoleLabel;
+}
+
+/**
+ * Indique si le chargement initial est en cours.
+ */
+export function getIsLoading(): boolean {
+	return isLoading;
+}
+
+/**
+ * Indique si un basculement de rôle est en cours.
+ */
+export function getIsSwitching(): boolean {
+	return isSwitching;
+}
+
+/**
+ * Réinitialise l'état (à appeler au logout).
+ */
+export function resetRoleContext(): void {
+	roles = [];
+	activeRole = null;
+	activeRoleLabel = null;
+	isFetched = false;
+}

frontend/src/routes/+layout.svelte

@@ -3,6 +3,7 @@
 	import { browser } from '$app/environment';
 	import { QueryClient, QueryClientProvider } from '@tanstack/svelte-query';
 	import { onLogout } from '$lib/auth/auth.svelte';
+	import { resetRoleContext } from '$features/roles/roleContext.svelte';
 
 	let { children } = $props();
 
@@ -21,6 +22,7 @@
 	// Clear user-specific caches on logout to prevent cross-account data leakage
 	onLogout(() => {
 		queryClient.removeQueries({ queryKey: ['sessions'] });
+		resetRoleContext();
 	});
 </script>
 

frontend/src/routes/admin/+layout.svelte

@@ -1,14 +1,23 @@
 <script lang="ts">
+	import { untrack } from 'svelte';
 	import { goto } from '$app/navigation';
 	import { page } from '$app/state';
 	import { logout } from '$lib/auth/auth.svelte';
+	import RoleSwitcher from '$lib/components/organisms/RoleSwitcher/RoleSwitcher.svelte';
+	import { fetchRoles, resetRoleContext } from '$features/roles/roleContext.svelte';
 
 	let { children } = $props();
 	let isLoggingOut = $state(false);
 
+	// Load user roles on mount for multi-role context switching (FR5)
+	$effect(() => {
+		untrack(() => fetchRoles());
+	});
+
 	async function handleLogout() {
 		isLoggingOut = true;
 		try {
+			resetRoleContext();
 			await logout();
 		} finally {
 			isLoggingOut = false;
@@ -38,6 +47,7 @@
 				<span class="logo-text">Classeo</span>
 			</button>
 			<nav class="header-nav">
+				<RoleSwitcher />
 				<a href="/dashboard" class="nav-link">Tableau de bord</a>
 				<a href="/admin/users" class="nav-link" class:active={isUsersActive}>Utilisateurs</a>
 				<a href="/admin/classes" class="nav-link" class:active={isClassesActive}>Classes</a>

frontend/src/routes/admin/users/+page.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
 	import { getApiBaseUrl } from '$lib/api/config';
 	import { authenticatedFetch, getCurrentUserId } from '$lib/auth';
+	import { updateUserRoles } from '$features/roles/api/roles';
 
 	// Types
 	interface User {
@@ -8,6 +9,7 @@
 		email: string;
 		role: string;
 		roleLabel: string;
+		roles: string[];
 		firstName: string;
 		lastName: string;
 		statut: string;
@@ -21,6 +23,7 @@
 
 	// Role options (admin can assign these roles)
 	const ROLE_OPTIONS = [
+		{ value: 'ROLE_SUPER_ADMIN', label: 'Super Admin' },
 		{ value: 'ROLE_ADMIN', label: 'Directeur' },
 		{ value: 'ROLE_PROF', label: 'Enseignant' },
 		{ value: 'ROLE_VIE_SCOLAIRE', label: 'Vie Scolaire' },
@@ -53,7 +56,7 @@
 	let newFirstName = $state('');
 	let newLastName = $state('');
 	let newEmail = $state('');
-	let newRole = $state('');
+	let newRoles = $state<string[]>([]);
 	let isSubmitting = $state(false);
 	let isResending = $state<string | null>(null);
 
@@ -64,6 +67,12 @@
 	let isBlocking = $state(false);
 	let isUnblocking = $state<string | null>(null);
 
+	// Roles modal state
+	let showRolesModal = $state(false);
+	let rolesTargetUser = $state<User | null>(null);
+	let selectedRoles = $state<string[]>([]);
+	let isSavingRoles = $state(false);
+
 	// Load users on mount
 	$effect(() => {
 		loadUsers();
@@ -106,7 +115,7 @@
 	}
 
 	async function handleCreateUser() {
-		if (!newFirstName.trim() || !newLastName.trim() || !newEmail.trim() || !newRole) return;
+		if (!newFirstName.trim() || !newLastName.trim() || !newEmail.trim() || newRoles.length === 0) return;
 
 		try {
 			isSubmitting = true;
@@ -121,7 +130,7 @@
 					firstName: newFirstName.trim(),
 					lastName: newLastName.trim(),
 					email: newEmail.trim().toLowerCase(),
-					role: newRole
+					roles: newRoles
 				})
 			});
 
@@ -196,7 +205,7 @@
 		newFirstName = '';
 		newLastName = '';
 		newEmail = '';
-		newRole = '';
+		newRoles = [];
 		error = null;
 	}
 
@@ -248,7 +257,7 @@
 	}
 
 	function canBlockUser(user: User): boolean {
-		return user.statut !== 'suspended' && user.statut !== 'archived' && user.id !== getCurrentUserId();
+		return user.statut === 'active' && user.id !== getCurrentUserId();
 	}
 
 	function openBlockModal(user: User) {
@@ -346,6 +355,59 @@
 		}
 	}
 
+	function openRolesModal(user: User) {
+		rolesTargetUser = user;
+		selectedRoles = [...(user.roles ?? [user.role])];
+		showRolesModal = true;
+		error = null;
+	}
+
+	function closeRolesModal() {
+		showRolesModal = false;
+		rolesTargetUser = null;
+		selectedRoles = [];
+	}
+
+	function toggleRole(roleValue: string) {
+		if (selectedRoles.includes(roleValue)) {
+			if (selectedRoles.length > 1) {
+				selectedRoles = selectedRoles.filter((r) => r !== roleValue);
+			}
+		} else {
+			selectedRoles = [...selectedRoles, roleValue];
+		}
+	}
+
+	async function handleSaveRoles() {
+		if (!rolesTargetUser || selectedRoles.length === 0) return;
+
+		try {
+			isSavingRoles = true;
+			error = null;
+			await updateUserRoles(rolesTargetUser.id, selectedRoles);
+			successMessage = `Les rôles de ${rolesTargetUser.firstName} ${rolesTargetUser.lastName} ont été mis à jour.`;
+			closeRolesModal();
+			await loadUsers();
+		} catch (e) {
+			error = e instanceof Error ? e.message : 'Erreur lors de la mise à jour des rôles';
+		} finally {
+			isSavingRoles = false;
+		}
+	}
+
+	function toggleNewRole(roleValue: string) {
+		if (newRoles.includes(roleValue)) {
+			newRoles = newRoles.filter((r) => r !== roleValue);
+		} else {
+			newRoles = [...newRoles, roleValue];
+		}
+	}
+
+	function getRoleLabelByValue(roleValue: string): string {
+		const found = ROLE_OPTIONS.find((r) => r.value === roleValue);
+		return found?.label ?? roleValue;
+	}
+
 	function formatDate(dateStr: string | null): string {
 		if (!dateStr) return '-';
 		return new Date(dateStr).toLocaleDateString('fr-FR', {
@@ -445,7 +507,15 @@
 							</td>
 							<td class="user-email">{user.email}</td>
 							<td>
-								<span class="role-badge">{user.roleLabel}</span>
+								<div class="role-badges">
+									{#if user.roles && user.roles.length > 0}
+										{#each user.roles as roleValue}
+											<span class="role-badge">{getRoleLabelByValue(roleValue)}</span>
+										{/each}
+									{:else}
+										<span class="role-badge">{user.roleLabel}</span>
+									{/if}
+								</div>
 							</td>
 							<td>
 								<span class="status-badge {getStatutClass(user.statut, user.invitationExpiree)}">
@@ -459,6 +529,14 @@
 							</td>
 							<td class="date-cell">{formatDate(user.invitedAt)}</td>
 							<td class="actions-cell">
+								{#if user.id !== getCurrentUserId()}
+									<button
+										class="btn-secondary btn-sm"
+										onclick={() => openRolesModal(user)}
+									>
+										Rôles
+									</button>
+								{/if}
 								{#if canResendInvitation(user)}
 									<button
 										class="btn-secondary btn-sm"
@@ -565,15 +643,19 @@
 					/>
 				</div>
 
-				<div class="form-group">
+				<fieldset class="roles-fieldset">
-					<label for="user-role">Rôle *</label>
+					<legend class="roles-legend">Rôle(s) *</legend>
-					<select id="user-role" bind:value={newRole} required>
+					{#each ROLE_OPTIONS as role}
-						<option value="">-- Sélectionner un rôle --</option>
+						<label class="role-checkbox-label">
-						{#each ROLE_OPTIONS as role}
+							<input
-							<option value={role.value}>{role.label}</option>
+								type="checkbox"
-						{/each}
+								checked={newRoles.includes(role.value)}
-					</select>
+								onchange={() => toggleNewRole(role.value)}
-				</div>
+							/>
+							<span class="role-checkbox-text">{role.label}</span>
+						</label>
+					{/each}
+				</fieldset>
 
 				<div class="form-hint-block">
 					Un email d'invitation sera automatiquement envoyé à l'utilisateur.
@@ -587,7 +669,7 @@
 					<button
 						type="submit"
 						class="btn-primary"
-						disabled={isSubmitting || !newFirstName.trim() || !newLastName.trim() || !newEmail.trim() || !newRole}
+						disabled={isSubmitting || !newFirstName.trim() || !newLastName.trim() || !newEmail.trim() || newRoles.length === 0}
 					>
 						{#if isSubmitting}
 							Envoi de l'invitation...
@@ -663,6 +745,74 @@
 	</div>
 {/if}
 
+<!-- Edit Roles Modal -->
+{#if showRolesModal && rolesTargetUser}
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
+	<div class="modal-overlay" onclick={closeRolesModal} role="presentation">
+		<div
+			class="modal"
+			role="dialog"
+			aria-modal="true"
+			aria-labelledby="roles-modal-title"
+			tabindex="-1"
+			onclick={(e) => e.stopPropagation()}
+			onkeydown={(e) => { if (e.key === 'Escape') closeRolesModal(); }}
+		>
+			<header class="modal-header">
+				<h2 id="roles-modal-title">Modifier les rôles</h2>
+				<button class="modal-close" onclick={closeRolesModal} aria-label="Fermer">×</button>
+			</header>
+
+			<div class="modal-body">
+				<p class="roles-modal-user">
+					{rolesTargetUser.firstName} {rolesTargetUser.lastName} ({rolesTargetUser.email})
+				</p>
+
+				<fieldset class="roles-fieldset">
+					<legend class="roles-legend">Rôles attribués</legend>
+					{#each ROLE_OPTIONS as role}
+						<label class="role-checkbox-label">
+							<input
+								type="checkbox"
+								checked={selectedRoles.includes(role.value)}
+								onchange={() => toggleRole(role.value)}
+								disabled={selectedRoles.includes(role.value) && selectedRoles.length === 1}
+							/>
+							<span class="role-checkbox-text">{role.label}</span>
+							{#if selectedRoles.includes(role.value) && selectedRoles.length === 1}
+								<span class="role-checkbox-hint">(dernier rôle)</span>
+							{/if}
+						</label>
+					{/each}
+				</fieldset>
+
+				<div class="form-hint-block">
+					Un utilisateur doit avoir au moins un rôle. Les utilisateurs avec plusieurs rôles
+					pourront basculer entre leurs différentes vues.
+				</div>
+
+				<div class="modal-actions">
+					<button type="button" class="btn-secondary" onclick={closeRolesModal} disabled={isSavingRoles}>
+						Annuler
+					</button>
+					<button
+						type="button"
+						class="btn-primary"
+						onclick={handleSaveRoles}
+						disabled={isSavingRoles || selectedRoles.length === 0}
+					>
+						{#if isSavingRoles}
+							Enregistrement...
+						{:else}
+							Enregistrer
+						{/if}
+					</button>
+				</div>
+			</div>
+		</div>
+	</div>
+{/if}
+
 <style>
 	.users-page {
 		padding: 1.5rem;
@@ -1129,8 +1279,7 @@
 		color: #374151;
 	}
 
-	.form-group input,
+	.form-group input {
-	.form-group select {
 		width: 100%;
 		padding: 0.75rem 1rem;
 		border: 1px solid #d1d5db;
@@ -1139,8 +1288,7 @@
 		transition: border-color 0.2s;
 	}
 
-	.form-group input:focus,
+	.form-group input:focus {
-	.form-group select:focus {
 		outline: none;
 		border-color: #3b82f6;
 		box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
@@ -1191,6 +1339,59 @@
 		border-top: 1px solid #e5e7eb;
 	}
 
+	/* Role badges */
+	.role-badges {
+		display: flex;
+		flex-wrap: wrap;
+		gap: 0.25rem;
+	}
+
+	/* Roles modal */
+	.roles-modal-user {
+		margin: 0 0 1.25rem;
+		font-size: 0.875rem;
+		color: #6b7280;
+	}
+
+	.roles-fieldset {
+		border: 1px solid #e5e7eb;
+		border-radius: 0.5rem;
+		padding: 1rem;
+		margin: 0 0 1.25rem;
+	}
+
+	.roles-legend {
+		font-size: 0.875rem;
+		font-weight: 600;
+		color: #374151;
+		padding: 0 0.5rem;
+	}
+
+	.role-checkbox-label {
+		display: flex;
+		align-items: center;
+		gap: 0.5rem;
+		padding: 0.5rem 0;
+		cursor: pointer;
+	}
+
+	.role-checkbox-label input[type='checkbox'] {
+		width: 1rem;
+		height: 1rem;
+		accent-color: #3b82f6;
+	}
+
+	.role-checkbox-text {
+		font-size: 0.875rem;
+		color: #374151;
+	}
+
+	.role-checkbox-hint {
+		font-size: 0.75rem;
+		color: #9ca3af;
+		font-style: italic;
+	}
+
 	@media (max-width: 768px) {
 		.filters-bar {
 			flex-direction: column;

frontend/src/routes/dashboard/+layout.svelte

@@ -1,16 +1,29 @@
 <script lang="ts">
+	import { untrack } from 'svelte';
 	import { goto } from '$app/navigation';
-	import { logout } from '$lib/auth/auth.svelte';
+	import { isAuthenticated, refreshToken, logout } from '$lib/auth/auth.svelte';
+	import RoleSwitcher from '$lib/components/organisms/RoleSwitcher/RoleSwitcher.svelte';
+	import { fetchRoles, resetRoleContext } from '$features/roles/roleContext.svelte';
 
 	let { children } = $props();
 	let isLoggingOut = $state(false);
 
-	// Note: Authentication is handled by authenticatedFetch in the page component.
+	// Load user roles on mount for multi-role context switching (FR5)
-	// If not authenticated, authenticatedFetch will attempt refresh and redirect to /login if needed.
+	// Guard: only fetch if authenticated (or refresh succeeds), otherwise stay in demo mode
+	$effect(() => {
+		untrack(async () => {
+			if (!isAuthenticated()) {
+				const refreshed = await refreshToken();
+				if (!refreshed) return;
+			}
+			fetchRoles();
+		});
+	});
 
 	async function handleLogout() {
 		isLoggingOut = true;
 		try {
+			resetRoleContext();
 			await logout();
 		} finally {
 			isLoggingOut = false;
@@ -33,6 +46,7 @@
 				<span class="logo-text">Classeo</span>
 			</button>
 			<nav class="header-nav">
+				<RoleSwitcher />
 				<a href="/dashboard" class="nav-link active">Tableau de bord</a>
 				<button class="nav-button" onclick={goSettings}>Parametres</button>
 				<button class="logout-button" onclick={handleLogout} disabled={isLoggingOut}>

frontend/src/routes/dashboard/+page.svelte

@@ -5,12 +5,33 @@
 	import DashboardTeacher from '$lib/components/organisms/Dashboard/DashboardTeacher.svelte';
 	import DashboardStudent from '$lib/components/organisms/Dashboard/DashboardStudent.svelte';
 	import DashboardAdmin from '$lib/components/organisms/Dashboard/DashboardAdmin.svelte';
+	import { getActiveRole, getIsLoading } from '$features/roles/roleContext.svelte';
 
-	type UserRole = 'parent' | 'teacher' | 'student' | 'admin' | 'direction';
+	type DashboardView = 'parent' | 'teacher' | 'student' | 'admin';
 
-	// For now, default to parent role with demo data
+	const ROLE_TO_VIEW: Record<string, DashboardView> = {
-	// TODO: Fetch real user profile from /api/me when endpoint is implemented
+		ROLE_PARENT: 'parent',
-	let userRole = $state<UserRole>('parent');
+		ROLE_PROF: 'teacher',
+		ROLE_ELEVE: 'student',
+		ROLE_ADMIN: 'admin',
+		ROLE_SUPER_ADMIN: 'admin',
+		ROLE_VIE_SCOLAIRE: 'admin',
+		ROLE_SECRETARIAT: 'admin'
+	};
+
+	// Fallback demo role when not authenticated or roles not loaded
+	let demoRole = $state<DashboardView>('parent');
+
+	// Use real role context if available, otherwise fallback to demo
+	let dashboardView = $derived<DashboardView>(
+		ROLE_TO_VIEW[getActiveRole() ?? ''] ?? demoRole
+	);
+
+	// True when roles come from the API (user is authenticated)
+	let hasRoleContext = $derived(getActiveRole() !== null);
+
+	// True when role loading has started (indicates an authenticated user)
+	let isRoleLoading = $derived(getIsLoading());
 
 	// Simulated first login detection (in real app, this comes from API)
 	let isFirstLogin = $state(true);
@@ -26,16 +47,13 @@
 
 	function handleToggleSerenity(enabled: boolean) {
 		serenityEnabled = enabled;
-		// TODO: POST to /api/me/preferences when backend is ready
-		console.log('Serenity score preference updated:', enabled);
 	}
 
 	// Cast demo data to proper type
 	const typedDemoData = demoData as DemoData;
 
-	// Allow switching roles for demo purposes
+	function switchDemoRole(role: DashboardView) {
-	function switchRole(role: UserRole) {
+		demoRole = role;
-		userRole = role;
 		isFirstLogin = false;
 	}
 </script>
@@ -44,17 +62,25 @@
 	<title>Tableau de bord - Classeo</title>
 </svelte:head>
 
-<!-- Demo role switcher - TODO: Remove when real authentication is implemented -->
+<!-- Loading state when roles are being fetched -->
-<!-- This will be hidden once we can determine user role from /api/me -->
+{#if isRoleLoading}
-<div class="demo-controls">
+	<div class="loading-state">
-	<span class="demo-label">Démo - Changer de rôle :</span>
+		<div class="spinner"></div>
-	<button class:active={userRole === 'parent'} onclick={() => switchRole('parent')}>Parent</button>
+		<p>Chargement du tableau de bord...</p>
-	<button class:active={userRole === 'teacher'} onclick={() => switchRole('teacher')}>Enseignant</button>
+	</div>
-	<button class:active={userRole === 'student'} onclick={() => switchRole('student')}>Élève</button>
+{:else if !hasRoleContext && !isRoleLoading}
-	<button class:active={userRole === 'admin'} onclick={() => switchRole('admin')}>Admin</button>
+	<!-- Demo role switcher shown when not authenticated (no role context from API) -->
-</div>
+	<!-- The RoleSwitcher in the header handles multi-role switching for authenticated users -->
+	<div class="demo-controls">
+		<span class="demo-label">Démo - Changer de rôle :</span>
+		<button class:active={demoRole === 'parent'} onclick={() => switchDemoRole('parent')}>Parent</button>
+		<button class:active={demoRole === 'teacher'} onclick={() => switchDemoRole('teacher')}>Enseignant</button>
+		<button class:active={demoRole === 'student'} onclick={() => switchDemoRole('student')}>Élève</button>
+		<button class:active={demoRole === 'admin'} onclick={() => switchDemoRole('admin')}>Admin</button>
+	</div>
+{/if}
 
-{#if userRole === 'parent'}
+{#if dashboardView === 'parent'}
 	<DashboardParent
 		demoData={typedDemoData}
 		{isFirstLogin}
@@ -64,11 +90,11 @@
 		{childName}
 		onToggleSerenity={handleToggleSerenity}
 	/>
-{:else if userRole === 'teacher'}
+{:else if dashboardView === 'teacher'}
 	<DashboardTeacher isLoading={false} {hasRealData} />
-{:else if userRole === 'student'}
+{:else if dashboardView === 'student'}
 	<DashboardStudent demoData={typedDemoData} isLoading={false} {hasRealData} isMinor={true} />
-{:else if userRole === 'admin' || userRole === 'direction'}
+{:else if dashboardView === 'admin'}
 	<DashboardAdmin
 		isLoading={false}
 		{hasRealData}
@@ -77,6 +103,30 @@
 {/if}
 
 <style>
+	.loading-state {
+		display: flex;
+		flex-direction: column;
+		align-items: center;
+		justify-content: center;
+		padding: 3rem;
+		text-align: center;
+	}
+
+	.spinner {
+		width: 2rem;
+		height: 2rem;
+		border: 3px solid #e5e7eb;
+		border-top-color: #3b82f6;
+		border-radius: 50%;
+		animation: spin 0.8s linear infinite;
+	}
+
+	@keyframes spin {
+		to {
+			transform: rotate(360deg);
+		}
+	}
+
 	.demo-controls {
 		display: flex;
 		align-items: center;