feat(absences) : avancement module absences + suppression du portail client

Deux lots regroupés sur la branche feat/absence-management.

Suppression complète du portail client :
- retire ROLE_CLIENT (security.yaml) ; User::getRoles() ajoute toujours ROLE_USER
- supprime l'entité ClientTicket (+ repo, states, relations), User.client et
  User.allowedProjects, NotificationService, ProjectAllowedExtension, le bloc
  ROLE_CLIENT de MailAccessChecker
- front : pages /portal, layout portal, composants client-ticket/,
  AdminClientTicketTab, services/dto/i18n/docs associés
- fixtures : retire les users client-liot / client-acme
- migration Version20260522110000 (drop client_ticket, user_allowed_projects,
  colonnes liées ; task_document.task_id -> NOT NULL)
- tests : retire les cas obsolètes testant le blocage des clients sur le mail

Module gestion des absences (WIP) :
- entités / migrations (Version20260521160000, Version20260522090000)
- pages absences.vue / team-absences.vue, composants frontend/components/absence/
- services front, AccrueLeaveCommand, PublicHolidayController

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/services/dto/user-data.ts

@@ -1,20 +1,39 @@
-import type { Project } from './project'
+export type ContractType = 'CDI' | 'CDD' | 'STAGE' | 'ALTERNANCE' | 'AUTRE'
+export type FamilySituation = 'CELIBATAIRE' | 'MARIE' | 'PACSE' | 'DIVORCE' | 'VEUF'
 
 export type UserData = {
     id: number
     '@id'?: string
     username: string
     roles: string[]
-    client?: { id: number; name: string } | null
-    allowedProjects?: Project[]
     avatarUrl?: string | null
     apiToken?: string | null
+    // HR / absence management
+    isEmployee?: boolean
+    hireDate?: string | null
+    endDate?: string | null
+    contractType?: ContractType | null
+    workTimeRatio?: number
+    annualLeaveDays?: number
+    referencePeriodStart?: string
+    initialLeaveBalance?: number
+    familySituation?: FamilySituation | null
+    nbChildren?: number
 }
 
 export type UserWrite = {
     username: string
     plainPassword?: string
     roles: string[]
-    client?: string | null
-    allowedProjects?: string[]
+    // HR / absence management
+    isEmployee?: boolean
+    hireDate?: string | null
+    endDate?: string | null
+    contractType?: ContractType | null
+    workTimeRatio?: number
+    annualLeaveDays?: number
+    referencePeriodStart?: string
+    initialLeaveBalance?: number
+    familySituation?: FamilySituation | null
+    nbChildren?: number
 }