sequenceDiagram participant K as Caissière participant U as UI participant H as hwproxy participant A as API participant J as Job K->>U: Bouton d'ajout séance activate K U->>A: PUT posbasket/addProductLine A->>J: cineges.posbasket.addproductline J->>U: Notif + panier U->>H: CustomerDisplay: infos panier deactivate K J->>U: Notif du nombre de places restantes