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/time-tracking/TimeTrackingCalendar.vue

@@ -9,6 +9,7 @@
                     v-for="day in days"
                     :key="'header-' + day.dateStr"
                     class="flex-1 border-r border-neutral-100 py-2 text-center"
+                    :class="{ 'bg-orange-50': day.holiday }"
                 >
                     <div class="text-lg font-bold" :class="isToday(day.date) ? 'text-orange-500' : 'text-neutral-900'">
                         {{ day.dayNum }}
@@ -16,6 +17,14 @@
                     <div class="text-xs" :class="isToday(day.date) ? 'text-orange-500' : 'text-neutral-500'">
                         {{ day.label }}
                     </div>
+                    <div
+                        v-if="day.holiday"
+                        class="flex items-center justify-center gap-0.5 truncate px-1 text-[10px] font-medium text-amber-600"
+                        :title="day.holiday"
+                    >
+                        <Icon name="mdi:star-four-points-outline" size="10" class="flex-shrink-0" />
+                        <span class="truncate">{{ day.holiday }}</span>
+                    </div>
                     <div class="text-[10px] text-neutral-400">{{ day.totalFormatted }}</div>
                 </div>
             </div>
@@ -40,6 +49,7 @@
                 :key="day.dateStr"
                 :ref="(el) => { dayColumnEls[dayIndex] = el as HTMLElement }"
                 class="relative flex-1 border-r border-neutral-100"
+                :class="{ 'bg-orange-50': day.holiday }"
                 @click="onClickGrid($event, day)"
                 @contextmenu.prevent="onContextMenuGrid($event, day)"
             >
@@ -141,8 +151,10 @@
 
 <script setup lang="ts">
 import type { TimeEntry } from '~/services/dto/time-entry'
+import { useAbsenceService } from '~/services/absences'
 
 const { t } = useI18n()
+const absenceService = useAbsenceService()
 
 const props = defineProps<{
     entries: TimeEntry[]
@@ -209,6 +221,23 @@ onMounted(() => {
     })
 })
 
+// --- Public holidays (computed server-side, shared with the absence calendar) ---
+const holidays = ref<Record<string, string>>({})
+
+async function loadHolidays() {
+    const count = props.viewMode === 'week' ? 7 : 1
+    const start = new Date(props.startDate)
+    const end = new Date(start)
+    end.setDate(end.getDate() + count - 1)
+    try {
+        holidays.value = await absenceService.getPublicHolidays(toDateStr(start), toDateStr(end))
+    } catch {
+        holidays.value = {}
+    }
+}
+
+watch(() => [props.startDate, props.viewMode], loadHolidays, { immediate: true })
+
 // --- Days computation ---
 const days = computed(() => {
     const count = props.viewMode === 'week' ? 7 : 1
@@ -231,6 +260,7 @@ const days = computed(() => {
             dateStr,
             dayNum: d.getDate(),
             label: dayLabels[d.getDay()],
+            holiday: holidays.value[dateStr] ?? null,
             totalFormatted: `${String(totalH).padStart(2, '0')}:${String(totalM).padStart(2, '0')}:${String(totalS).padStart(2, '0')}`,
         })
     }