Étape 7 : authentification par lien magique + JWT + rôles

- app/auth/ : jetons (lien magique aléatoire haché SHA-256, JWT HS256),
  dépendances get_current_account / current_account_in_edition / require_roles
  + require_coordinator / require_staff, et ensure_can_write_position/_shift
- Endpoints app/api/auth.py : POST .../auth/magic-link (202 constant, pas de
  divulgation), POST .../auth/verify (JWT, jeton à usage unique), GET /auth/me
- Envoi d'email stubé : le lien est journalisé (logger app.auth, identifiants
  seulement, aucune donnée nominative)
- app/api/accounts.py : CRUD des comptes réservé à la COORDINATION
- Rôles appliqués sur toute l'API :
  COORDINATION accès complet ; RÉFÉRENT lecture globale + écriture sur ses
  seuls postes/créneaux/affectations ; BÉNÉVOLE sa fiche et ses affectations,
  aucune écriture
- imports.py aligné sur la dépendance get_edition (404 avant 403)
- Secret JWT porté à >= 32 octets (config, .env.example, docker-compose)
- seed : crée un compte VOLUNTEER pour chaque bénévole avec email (104 comptes)
- conftest : fixtures make_account / coordinator / as_account / raw_client ;
  la suite existante s'exécute en COORDINATION
- 13 tests d'authentification + de rôles ; 119 tests au total ; alembic check
  toujours vert (Account / MagicLinkToken déjà dans la migration 0001)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017uUsRg7XzopkCPWimwg9ZM

backend/app/api/volunteers.py

@@ -9,14 +9,27 @@ from sqlmodel import Session, select
 from app.api._common import owned_or_404, replace_links, resolve_skills
 from app.api.deps import get_edition
 from app.api.schemas import VolunteerCreate, VolunteerRead, VolunteerUpdate
+from app.auth.deps import (
+    current_account_in_edition,
+    require_coordinator,
+    require_staff,
+)
 from app.db import get_session
-from app.models import Edition, Skill, Volunteer, VolunteerSkill
+from app.models import Account, Edition, Role, Skill, Volunteer, VolunteerSkill
 
 router = APIRouter(
     prefix="/editions/{edition_id}/volunteers", tags=["volunteers"]
 )
 
 
+def _ensure_can_read(account: Account, volunteer_id: uuid.UUID) -> None:
+    if account.role in (Role.COORDINATOR, Role.LEAD):
+        return
+    if account.volunteer_id == volunteer_id:
+        return
+    raise HTTPException(status_code=403, detail={"code": "error.forbidden"})
+
+
 def _skill_codes(session: Session, volunteer_id: uuid.UUID) -> list[str]:
     return sorted(
         session.exec(
@@ -53,6 +66,7 @@ def _set_skills(
 def create_volunteer(
     payload: VolunteerCreate,
     edition: Edition = Depends(get_edition),
+    _guard: Account = Depends(require_coordinator),
     session: Session = Depends(get_session),
 ) -> VolunteerRead:
     volunteer = Volunteer(
@@ -76,6 +90,7 @@ def create_volunteer(
 @router.get("", response_model=list[VolunteerRead])
 def list_volunteers(
     edition: Edition = Depends(get_edition),
+    _guard: Account = Depends(require_staff),
     session: Session = Depends(get_session),
 ) -> list[VolunteerRead]:
     volunteers = session.exec(
@@ -90,8 +105,10 @@ def list_volunteers(
 def get_volunteer(
     volunteer_id: uuid.UUID,
     edition: Edition = Depends(get_edition),
+    account: Account = Depends(current_account_in_edition),
     session: Session = Depends(get_session),
 ) -> VolunteerRead:
+    _ensure_can_read(account, volunteer_id)
     volunteer = owned_or_404(session.get(Volunteer, volunteer_id), edition.id)
     return _read(session, volunteer)
 
@@ -101,6 +118,7 @@ def update_volunteer(
     volunteer_id: uuid.UUID,
     payload: VolunteerUpdate,
     edition: Edition = Depends(get_edition),
+    _guard: Account = Depends(require_coordinator),
     session: Session = Depends(get_session),
 ) -> VolunteerRead:
     volunteer = owned_or_404(session.get(Volunteer, volunteer_id), edition.id)
@@ -126,6 +144,7 @@ def update_volunteer(
 def delete_volunteer(
     volunteer_id: uuid.UUID,
     edition: Edition = Depends(get_edition),
+    _guard: Account = Depends(require_coordinator),
     session: Session = Depends(get_session),
 ) -> Response:
     volunteer = owned_or_404(session.get(Volunteer, volunteer_id), edition.id)