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/absence/AbsenceDateField.vue

@@ -0,0 +1,73 @@
+<template>
+    <div class="absence-date-field">
+        <label class="mb-1 block text-sm font-medium text-neutral-700">{{ label }}</label>
+        <MalioDate
+            :model-value="modelValue"
+            :min="min ?? undefined"
+            :max="max ?? undefined"
+            :error="error"
+            :clearable="true"
+            group-class="w-full"
+            @update:model-value="$emit('update:modelValue', $event)"
+        />
+
+        <div v-if="showPills" class="mt-2 flex flex-wrap gap-2">
+            <button
+                v-for="opt in pillOptions"
+                :key="String(opt.value)"
+                type="button"
+                class="rounded-full border px-4 py-1.5 text-sm font-medium transition"
+                :class="half === opt.value
+                    ? 'border-primary-500 bg-primary-50 text-primary-600'
+                    : 'border-neutral-300 text-neutral-600 hover:border-neutral-400'"
+                @click="$emit('update:half', opt.value)"
+            >
+                {{ opt.label }}
+            </button>
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+import type { HalfDay } from '~/services/dto/absence'
+
+const props = withDefaults(defineProps<{
+    /** ISO date string "YYYY-MM-DD" or null. */
+    modelValue: string | null
+    half: HalfDay | null
+    label: string
+    /** 'start' shows full/morning/afternoon, 'end' shows full/morning only. */
+    mode?: 'start' | 'end'
+    error?: string
+    /** ISO date string "YYYY-MM-DD" or null. */
+    min?: string | null
+    max?: string | null
+    showPills?: boolean
+}>(), {
+    mode: 'start',
+    error: '',
+    min: null,
+    max: null,
+    showPills: true,
+})
+
+defineEmits<{
+    'update:modelValue': [value: string | null]
+    'update:half': [value: HalfDay | null]
+}>()
+
+const { t } = useI18n()
+
+type PillOption = { label: string; value: HalfDay | null }
+
+const pillOptions = computed<PillOption[]>(() => {
+    const base: PillOption[] = [
+        { label: t('absences.form.fullDay'), value: null },
+        { label: t('absences.halfDay.matin'), value: 'matin' },
+    ]
+    if (props.mode === 'start') {
+        base.push({ label: t('absences.halfDay.apres_midi'), value: 'apres_midi' })
+    }
+    return base
+})
+</script>