API: administrateur de foyer, code d'invitation, créer/rejoindre/quitter/supprimer (step 2/8)
- House.adminId / House.inviteCode (migration Prisma)
- house.service: createHouse, joinHouse, leaveCurrentHouse (transfert
d'admin ou suppression du foyer si dernier membre), deleteHouse
(admin-only), removeMember (admin-only)
- house.routes: POST /house, POST /house/join, POST /house/leave,
DELETE /house/current, DELETE /house/members/:memberId
- GET/PATCH /house/current renvoient désormais membres + admin + code