fix : affichage des absences dans les heures vue semaine + refacto

frontend/services/dto/contract.ts

@@ -1,7 +1,25 @@
+export const TRACKING_MODES = {
+  TIME: 'TIME',
+  PRESENCE: 'PRESENCE'
+} as const
+
+export type TrackingMode = (typeof TRACKING_MODES)[keyof typeof TRACKING_MODES]
+
+export const CONTRACT_TYPES = {
+  FORFAIT: 'FORFAIT',
+  H35: '35H',
+  H39: '39H',
+  INTERIM: 'INTERIM',
+  CUSTOM: 'CUSTOM'
+} as const
+
+export type ContractType = (typeof CONTRACT_TYPES)[keyof typeof CONTRACT_TYPES]
+
 export type Contract = {
   id: number
   name: string
-  trackingMode: 'TIME' | 'PRESENCE'
+  trackingMode: TrackingMode
+  type: ContractType
   weeklyHours?: number | null
   isActive?: boolean
 }