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/components/task/TaskDocumentUpload.vue

@@ -50,14 +50,13 @@ import { useTaskDocumentService } from '~/services/task-documents'
 
 const props = defineProps<{
     taskId?: number
-    clientTicketId?: number
 }>()
 
 const emit = defineEmits<{
     uploaded: []
 }>()
 
-const { upload: uploadFile, uploadForTicket } = useTaskDocumentService()
+const { upload: uploadFile } = useTaskDocumentService()
 const toast = useToast()
 const { t } = useI18n()
 
@@ -110,9 +109,7 @@ async function processFiles(files: File[]) {
         uploads.value.push(state)
 
         try {
-            if (props.clientTicketId) {
-                await uploadForTicket(props.clientTicketId, file)
-            } else if (props.taskId) {
+            if (props.taskId) {
                 await uploadFile(props.taskId, file)
             }
             state.uploading = false