[#MUI-36] Création d'un composant modal (#53)

| Numéro du ticket | Titre du ticket |
|------------------|-----------------|
|                  |                 |

## Description de la PR

## Modification du .env

## Check list

- [ ] Pas de régression
- [ ] TU/TI/TF rédigée
- [ ] TU/TI/TF OK
- [ ] CHANGELOG modifié

Reviewed-on: #53
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

.playground/pages/composant/modal/modal.vue

@@ -0,0 +1,74 @@
+<script setup lang="ts">
+import { ref } from 'vue'
+import MalioButton from "../../../../app/components/malio/button/Button.vue";
+
+const modalBase = ref(false)
+const modalForm = ref(false)
+const modalLong = ref(false)
+const modalNoDismiss = ref(false)
+</script>
+
+<template>
+  <div class="grid grid-cols-1 items-start gap-6 md:grid-cols-2">
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Modal simple</h2>
+      <MalioButton label="Ouvrir" @click="modalBase = true" />
+      <MalioModal v-model="modalBase" headerClass="py-7 px-[25px]" footerClass="flex justify-center pt-8">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Marquer comme vu ?</h2>
+        </template>
+        <template #footer>
+          <MalioButton label="Valider"/>
+        </template>
+      </MalioModal>
+    </div>
+
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Avec footer d'actions</h2>
+      <MalioButton label="Ouvrir le formulaire" variant="tertiary" @click="modalForm = true" />
+      <MalioModal v-model="modalForm" modal-class="max-w-lg">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Nouveau contact</h2>
+        </template>
+        <div class="flex flex-col gap-4 py-2">
+          <MalioInputText label="Nom" />
+          <MalioInputText label="Prénom" />
+          <MalioInputText label="Email" />
+        </div>
+        <template #footer>
+          <MalioButton label="Annuler" variant="secondary" button-class="flex-1" @click="modalForm = false" />
+          <MalioButton label="Enregistrer" button-class="flex-1" @click="modalForm = false" />
+        </template>
+      </MalioModal>
+    </div>
+
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Contenu long (body scrollable)</h2>
+      <MalioButton label="Ouvrir" variant="tertiary" @click="modalLong = true" />
+      <MalioModal v-model="modalLong">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Conditions</h2>
+        </template>
+        <div class="flex flex-col gap-4">
+          <p v-for="n in 20" :key="n" class="text-m-text">
+            Paragraphe {{ n }} — contenu long pour forcer le scroll interne ; le header et le footer restent fixes.
+          </p>
+        </div>
+        <template #footer>
+          <MalioButton label="Accepter" button-class="w-full" @click="modalLong = false" />
+        </template>
+      </MalioModal>
+    </div>
+
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Non dismissable (croix uniquement)</h2>
+      <MalioButton label="Ouvrir" variant="danger" @click="modalNoDismiss = true" />
+      <MalioModal v-model="modalNoDismiss" :dismissable="false" :close-on-escape="false">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Action requise</h2>
+        </template>
+        <p class="text-m-text">Ni le backdrop ni Échap ne ferment cette modal. Utilisez la croix.</p>
+      </MalioModal>
+    </div>
+  </div>
+</template>

.playground/playground.nav.ts

@@ -52,6 +52,7 @@ export const navSections: SidebarSection[] = [
     items: [
       {label: 'Sidebar', to: '/composant/sidebar/sidebar'},
       {label: 'Drawer', to: '/composant/drawer/drawer'},
+      {label: 'Modal', to: '/composant/modal/modal'},
       {label: 'Onglets', to: '/composant/tab/tabList'},
     ],
   },
@@ -66,6 +67,7 @@ export const navSections: SidebarSection[] = [
     label: 'DIVERS',
     icon: 'mdi:dots-horizontal',
     items: [
+      {label: 'Heure', to: '/composant/time/time'},
       {label: 'Sélecteur de site', to: '/composant/site/siteSelector'},
       {label: 'Formulaire client', to: '/composant/form/client'},
     ],

CHANGELOG.md

@@ -33,6 +33,7 @@ Liste des évolutions de la librairie Malio layer UI
 * [#MUI-34] Revoir le système de playground
 * [#MUI-33] Développer le composant Datepicker
 * [#MUI-33] Création du composant DateTime (date + heure, sélecteur d'heure natif intérimaire)
+* [#MUI-36] Création d'un composant modal (dialogue centré, focus-trap, scroll-lock, footer fixe)
 
 ### Changed
 * [#MUI-35] Refonte du composant drawer : slots `#header`/`#footer`, prop `side` (droite/gauche), `dismissable`, `closeOnEscape`, classes d'override, focus-trap, scroll-lock et fermeture au clavier. **Breaking** : la prop `title` est remplacée par le slot `#header`.

COMPONENTS.md

@@ -779,6 +779,58 @@ Panneau latéral (drawer) qui s'ouvre depuis la droite ou la gauche avec backdro
 
 ---
 
+## MalioModal
+
+Boîte de dialogue modale centrée avec backdrop semi-transparent. Gère l'accessibilité (focus-trap, restitution du focus, `Échap`), le verrouillage du scroll de la page et un empilement correct de plusieurs modals. Structure : header fixe, body scrollable (`max-h-[85vh]`), footer fixe.
+
+| Prop | Type | Défaut | Description |
+|------|------|--------|-------------|
+| `id` | `string` | auto | Identifiant HTML |
+| `modelValue` | `boolean` | `undefined` | État ouvert/fermé (v-model) |
+| `showClose` | `boolean` | `true` | Afficher le bouton de fermeture (croix) |
+| `dismissable` | `boolean` | `true` | Fermer au clic sur le backdrop |
+| `closeOnEscape` | `boolean` | `true` | Fermer avec la touche `Échap` |
+| `ariaLabel` | `string` | `''` | Nom accessible de secours quand le slot `#header` est absent |
+| `modalClass` | `string` | `''` | Classes CSS panneau, ex. largeur `max-w-lg` (twMerge) |
+| `overlayClass` | `string` | `''` | Classes CSS backdrop (twMerge) |
+| `headerClass` | `string` | `''` | Classes CSS barre header (twMerge) |
+| `bodyClass` | `string` | `''` | Classes CSS zone scrollable (twMerge) |
+| `footerClass` | `string` | `''` | Classes CSS footer fixe (twMerge) |
+
+**Events :** `update:modelValue(value: boolean)`, `close()`
+
+**Slots :**
+- `header` — en-tête (titre, etc.). S'il est absent et que `showClose` est `true`, seule la croix est affichée.
+- `default` — contenu (zone scrollable).
+- `footer` — actions (boutons). Rendu en bas, fixe, séparé par une bordure. N'apparaît que si le slot est fourni.
+
+```vue
+<MalioModal v-model="isOpen">
+  <template #header>
+    <h2 class="text-[24px] font-bold">Détails</h2>
+  </template>
+  <p>Contenu de la modal</p>
+</MalioModal>
+
+<!-- Largeur custom + footer d'actions -->
+<MalioModal v-model="isOpen" modal-class="max-w-lg">
+  <template #header><h2>Nouveau contact</h2></template>
+  <MalioInputText label="Nom" />
+  <template #footer>
+    <MalioButton label="Annuler" variant="secondary" button-class="flex-1" @click="isOpen = false" />
+    <MalioButton label="Enregistrer" button-class="flex-1" @click="isOpen = false" />
+  </template>
+</MalioModal>
+
+<!-- Non fermable au backdrop / Échap (croix uniquement) -->
+<MalioModal v-model="isOpen" :dismissable="false" :close-on-escape="false">
+  <template #header><h2>Action requise</h2></template>
+  <p>Fermeture via la croix uniquement</p>
+</MalioModal>
+```
+
+---
+
 ## MalioDataTable
 
 Tableau de données presentational avec pagination, filtres par slots et lignes cliquables.

app/components/malio/modal/Modal.test.ts

@@ -0,0 +1,320 @@
+import { afterEach, describe, expect, it } from 'vitest'
+import { enableAutoUnmount, mount } from '@vue/test-utils'
+import type { DefineComponent } from 'vue'
+import { Icon as IconifyIcon } from '@iconify/vue'
+import Modal from './Modal.vue'
+
+type ModalProps = {
+  id?: string
+  modelValue?: boolean
+  showClose?: boolean
+  dismissable?: boolean
+  closeOnEscape?: boolean
+  ariaLabel?: string
+  modalClass?: string
+  overlayClass?: string
+  headerClass?: string
+  bodyClass?: string
+  footerClass?: string
+}
+
+const ModalForTest = Modal as DefineComponent<ModalProps>
+
+function mountComponent(props: ModalProps = {}, slots?: Record<string, string>) {
+  return mount(ModalForTest, {
+    props,
+    slots,
+    global: { stubs: { Teleport: true } },
+  })
+}
+
+describe('MalioModal', () => {
+  enableAutoUnmount(afterEach)
+
+  afterEach(() => {
+    document.body.style.overflow = ''
+  })
+
+  it('does not render when modelValue is false', () => {
+    const wrapper = mountComponent({ modelValue: false })
+    expect(wrapper.find('[data-test="panel"]').exists()).toBe(false)
+  })
+
+  it('renders the panel when modelValue is true', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="panel"]').exists()).toBe(true)
+  })
+
+  it('centers the modal (items-center justify-center)', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    const root = wrapper.find('.fixed')
+    expect(root.classes()).toContain('items-center')
+    expect(root.classes()).toContain('justify-center')
+  })
+
+  it('renders default slot in the body', () => {
+    const wrapper = mountComponent(
+      { modelValue: true },
+      { default: '<p data-test="content">Contenu</p>' },
+    )
+    expect(wrapper.find('[data-test="body"] [data-test="content"]').text()).toBe('Contenu')
+  })
+
+  it('works in uncontrolled mode (defaults closed)', () => {
+    const wrapper = mountComponent()
+    expect(wrapper.find('[data-test="panel"]').exists()).toBe(false)
+  })
+
+  it('uses custom id when provided', () => {
+    const wrapper = mountComponent({ modelValue: true, id: 'my-modal' })
+    expect(wrapper.find('.fixed').attributes('id')).toBe('my-modal')
+  })
+
+  it('generates an id when not provided', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('.fixed').attributes('id')).toMatch(/^malio-modal-/)
+  })
+
+  it('has role="dialog" and aria-modal on the panel', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    const panel = wrapper.find('[data-test="panel"]')
+    expect(panel.attributes('role')).toBe('dialog')
+    expect(panel.attributes('aria-modal')).toBe('true')
+  })
+
+  it('applies modalClass to the panel', () => {
+    const wrapper = mountComponent({ modelValue: true, modalClass: 'max-w-2xl' })
+    expect(wrapper.find('[data-test="panel"]').classes()).toContain('max-w-2xl')
+  })
+
+  it('renders the #header slot inside the header bar', () => {
+    const wrapper = mountComponent(
+      { modelValue: true },
+      { header: '<h2 data-test="title">Titre</h2>' },
+    )
+    expect(wrapper.find('[data-test="header"] [data-test="title"]').text()).toBe('Titre')
+  })
+
+  it('renders the header bar when showClose is true even without #header', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="header"]').exists()).toBe(true)
+  })
+
+  it('does not render the header bar when no #header and showClose is false', () => {
+    const wrapper = mountComponent({ modelValue: true, showClose: false })
+    expect(wrapper.find('[data-test="header"]').exists()).toBe(false)
+  })
+
+  it('shows the close button by default', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="close-button"]').exists()).toBe(true)
+  })
+
+  it('hides the close button when showClose is false', () => {
+    const wrapper = mountComponent(
+      { modelValue: true, showClose: false },
+      { header: '<h2>Titre</h2>' },
+    )
+    expect(wrapper.find('[data-test="close-button"]').exists()).toBe(false)
+  })
+
+  it('close button renders mdi:cancel-bold icon', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    const icon = wrapper.findComponent(IconifyIcon)
+    expect(icon.props('icon')).toBe('mdi:cancel-bold')
+  })
+
+  it('close button has aria-label "Fermer"', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="close-button"]').attributes('aria-label')).toBe('Fermer')
+  })
+
+  it('emits update:modelValue false and close on close button click', async () => {
+    const wrapper = mountComponent({ modelValue: true })
+    await wrapper.find('[data-test="close-button"]').trigger('click')
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([false])
+    expect(wrapper.emitted('close')).toHaveLength(1)
+  })
+
+  it('sets aria-labelledby to the header id when #header is provided', () => {
+    const wrapper = mountComponent(
+      { modelValue: true, id: 'test-modal' },
+      { header: '<h2>Titre</h2>' },
+    )
+    const panel = wrapper.find('[data-test="panel"]')
+    expect(panel.attributes('aria-labelledby')).toBe('test-modal-header')
+    expect(wrapper.find('[data-test="header-content"]').attributes('id')).toBe('test-modal-header')
+  })
+
+  it('sets aria-label from ariaLabel when no #header is provided', () => {
+    const wrapper = mountComponent({ modelValue: true, ariaLabel: 'Boîte de dialogue' })
+    const panel = wrapper.find('[data-test="panel"]')
+    expect(panel.attributes('aria-label')).toBe('Boîte de dialogue')
+    expect(panel.attributes('aria-labelledby')).toBeUndefined()
+  })
+
+  it('applies headerClass to the header bar', () => {
+    const wrapper = mountComponent({ modelValue: true, headerClass: 'bg-m-primary' })
+    expect(wrapper.find('[data-test="header"]').classes()).toContain('bg-m-primary')
+  })
+
+  it('renders the #footer slot in a footer pinned below the body', () => {
+    const wrapper = mountComponent(
+      { modelValue: true },
+      { footer: '<button data-test="save">Enregistrer</button>' },
+    )
+    expect(wrapper.find('[data-test="body"] [data-test="footer"]').exists()).toBe(false)
+    expect(wrapper.find('[data-test="footer"] [data-test="save"]').exists()).toBe(true)
+  })
+
+  it('does not render the footer when no #footer slot', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="footer"]').exists()).toBe(false)
+  })
+
+  it('applies bodyClass to the body', () => {
+    const wrapper = mountComponent({ modelValue: true, bodyClass: 'px-10' })
+    expect(wrapper.find('[data-test="body"]').classes()).toContain('px-10')
+  })
+
+  it('applies footerClass to the footer', () => {
+    const wrapper = mountComponent(
+      { modelValue: true, footerClass: 'justify-end' },
+      { footer: '<span>pied</span>' },
+    )
+    expect(wrapper.find('[data-test="footer"]').classes()).toContain('justify-end')
+  })
+
+  it('emits update:modelValue false and close on backdrop click (dismissable)', async () => {
+    const wrapper = mountComponent({ modelValue: true })
+    await wrapper.find('[data-test="backdrop"]').trigger('click')
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([false])
+    expect(wrapper.emitted('close')).toHaveLength(1)
+  })
+
+  it('does not close on backdrop click when dismissable is false', async () => {
+    const wrapper = mountComponent({ modelValue: true, dismissable: false })
+    await wrapper.find('[data-test="backdrop"]').trigger('click')
+    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
+  })
+
+  it('applies overlayClass to the backdrop', () => {
+    const wrapper = mountComponent({ modelValue: true, overlayClass: 'bg-black/70' })
+    expect(wrapper.find('[data-test="backdrop"]').classes()).toContain('bg-black/70')
+  })
+
+  it('closes on Escape key when closeOnEscape is true', async () => {
+    const wrapper = mountComponent({ modelValue: true })
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Escape' })
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([false])
+    expect(wrapper.emitted('close')).toHaveLength(1)
+  })
+
+  it('does not close on Escape when closeOnEscape is false', async () => {
+    const wrapper = mountComponent({ modelValue: true, closeOnEscape: false })
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Escape' })
+    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
+  })
+
+  it('locks body scroll when opened and restores it when closed', async () => {
+    const wrapper = mountComponent({ modelValue: false })
+    expect(document.body.style.overflow).toBe('')
+    await wrapper.setProps({ modelValue: true })
+    expect(document.body.style.overflow).toBe('hidden')
+    await wrapper.setProps({ modelValue: false })
+    expect(document.body.style.overflow).toBe('')
+  })
+
+  it('moves focus into the panel when opened', async () => {
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: false, showClose: false },
+      slots: { default: '<button data-test="first">OK</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.setProps({ modelValue: true })
+    await wrapper.vm.$nextTick()
+    const first = wrapper.find('[data-test="first"]').element
+    expect(document.activeElement).toBe(first)
+    wrapper.unmount()
+  })
+
+  it('restores focus to the trigger when closed', async () => {
+    const trigger = document.createElement('button')
+    document.body.appendChild(trigger)
+    trigger.focus()
+    expect(document.activeElement).toBe(trigger)
+
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: false },
+      slots: { default: '<button>OK</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.setProps({ modelValue: true })
+    await wrapper.vm.$nextTick()
+    await wrapper.setProps({ modelValue: false })
+    await wrapper.vm.$nextTick()
+    expect(document.activeElement).toBe(trigger)
+
+    wrapper.unmount()
+    trigger.remove()
+  })
+
+  it('wraps focus to the first element when Tab is pressed on the last element', async () => {
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: true, showClose: false },
+      slots: { default: '<button data-test="btn1">First</button><button data-test="btn2">Last</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.vm.$nextTick()
+    const last = wrapper.find('[data-test="btn2"]').element as HTMLElement
+    last.focus()
+    expect(document.activeElement).toBe(last)
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Tab' })
+    expect(document.activeElement).toBe(wrapper.find('[data-test="btn1"]').element)
+    wrapper.unmount()
+  })
+
+  it('wraps focus to the last element when Shift+Tab is pressed on the first element', async () => {
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: true, showClose: false },
+      slots: { default: '<button data-test="btn1">First</button><button data-test="btn2">Last</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.vm.$nextTick()
+    const first = wrapper.find('[data-test="btn1"]').element as HTMLElement
+    first.focus()
+    expect(document.activeElement).toBe(first)
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Tab', shiftKey: true })
+    expect(document.activeElement).toBe(wrapper.find('[data-test="btn2"]').element)
+    wrapper.unmount()
+  })
+
+  it('does not release body scroll-lock when one stacked modal closes while another is still open', async () => {
+    const wrapperA = mount(ModalForTest, {
+      props: { modelValue: false },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    const wrapperB = mount(ModalForTest, {
+      props: { modelValue: false },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+
+    await wrapperA.setProps({ modelValue: true })
+    expect(document.body.style.overflow).toBe('hidden')
+
+    await wrapperB.setProps({ modelValue: true })
+    expect(document.body.style.overflow).toBe('hidden')
+
+    await wrapperB.setProps({ modelValue: false })
+    expect(document.body.style.overflow).toBe('hidden')
+
+    await wrapperA.setProps({ modelValue: false })
+    expect(document.body.style.overflow).toBe('')
+  })
+})

app/components/malio/modal/Modal.vue

@@ -0,0 +1,279 @@
+<template>
+  <Teleport to="body">
+    <Transition
+      name="modal"
+      appear
+      @after-leave="isRendered = false"
+    >
+      <div
+        v-if="isRendered && isOpen"
+        :id="componentId"
+        class="fixed inset-0 z-50 flex items-center justify-center p-4"
+        v-bind="attrs"
+      >
+        <div
+          :class="twMerge('absolute inset-0 bg-black/40', overlayClass)"
+          data-test="backdrop"
+          @click="onBackdropClick"
+        />
+
+        <div
+          ref="panelRef"
+          :class="twMerge(
+            'relative z-50 flex max-h-[85vh] w-full max-w-md flex-col rounded-malio bg-white shadow-[0_4px_4px_0_rgba(0,0,0,0.25)]',
+            modalClass,
+          )"
+          role="dialog"
+          aria-modal="true"
+          :aria-labelledby="hasHeader ? headerId : undefined"
+          :aria-label="hasHeader ? undefined : (ariaLabel || undefined)"
+          tabindex="-1"
+          data-test="panel"
+          @keydown="onKeydown"
+        >
+          <div
+            v-if="hasHeader || showClose"
+            :class="twMerge('flex shrink-0 items-center justify-between gap-4 px-5 py-[25px]', headerClass)"
+            data-test="header"
+          >
+            <div
+              :id="headerId"
+              class="min-w-0 flex-1"
+              data-test="header-content"
+            >
+              <slot name="header" />
+            </div>
+            <button
+              v-if="showClose"
+              type="button"
+              aria-label="Fermer"
+              class="flex h-8 w-8 shrink-0 cursor-pointer items-center justify-center rounded-full transition-colors hover:bg-m-surface"
+              data-test="close-button"
+              @click="close"
+            >
+              <IconifyIcon
+                icon="mdi:cancel-bold"
+                :width="16"
+                :height="16"
+              />
+            </button>
+          </div>
+          <div
+            :class="twMerge('flex-1 overflow-y-auto px-5', bodyClass)"
+            data-test="body"
+          >
+            <slot />
+          </div>
+          <div
+            v-if="$slots.footer"
+            :class="twMerge('flex shrink-0 items-center gap-3 px-5 py-4', footerClass)"
+            data-test="footer"
+          >
+            <slot name="footer" />
+          </div>
+        </div>
+      </div>
+    </Transition>
+  </Teleport>
+</template>
+
+<script setup lang="ts">
+import {
+  computed,
+  nextTick,
+  onBeforeUnmount,
+  onMounted,
+  ref,
+  useAttrs,
+  useId,
+  useSlots,
+  watch,
+} from 'vue'
+import { Icon as IconifyIcon } from '@iconify/vue'
+import { twMerge } from 'tailwind-merge'
+
+defineOptions({ name: 'MalioModal', inheritAttrs: false })
+
+const props = withDefaults(
+  defineProps<{
+    id?: string
+    modelValue?: boolean
+    showClose?: boolean
+    dismissable?: boolean
+    closeOnEscape?: boolean
+    ariaLabel?: string
+    modalClass?: string
+    overlayClass?: string
+    headerClass?: string
+    bodyClass?: string
+    footerClass?: string
+  }>(),
+  {
+    id: '',
+    modelValue: undefined,
+    showClose: true,
+    dismissable: true,
+    closeOnEscape: true,
+    ariaLabel: '',
+    modalClass: '',
+    overlayClass: '',
+    headerClass: '',
+    bodyClass: '',
+    footerClass: '',
+  },
+)
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', value: boolean): void
+  (e: 'close'): void
+}>()
+
+const attrs = useAttrs()
+const generatedId = useId()
+
+const componentId = computed(() => props.id || `malio-modal-${generatedId}`)
+
+const slots = useSlots()
+const headerId = computed(() => `${componentId.value}-header`)
+const hasHeader = computed(() => !!slots.header)
+
+const isControlled = computed(() => props.modelValue !== undefined)
+const localValue = ref(false)
+const isOpen = computed(() =>
+  isControlled.value ? props.modelValue! : localValue.value,
+)
+const isRendered = ref(isOpen.value)
+
+const panelRef = ref<HTMLElement | null>(null)
+
+let previouslyFocused: HTMLElement | null = null
+// Per-instance flag: true while this modal holds a scroll-lock count slot.
+let lockedByThisInstance = false
+
+function getFocusable(container: HTMLElement): HTMLElement[] {
+  return Array.from(
+    container.querySelectorAll<HTMLElement>(
+      'a[href], button:not([disabled]), textarea:not([disabled]), input:not([disabled]), select:not([disabled]), [tabindex]:not([tabindex="-1"]), [contenteditable]:not([contenteditable="false"])',
+    ),
+  ).filter((el) => el.tabIndex !== -1)
+}
+
+function onOpen() {
+  previouslyFocused = (document.activeElement as HTMLElement | null) ?? null
+  if (!lockedByThisInstance) {
+    lockedByThisInstance = true
+    openModalCount++
+    if (openModalCount === 1) {
+      document.body.style.overflow = 'hidden'
+    }
+  }
+  nextTick(() => {
+    const panel = panelRef.value
+    if (!panel) return
+    const focusable = getFocusable(panel)
+    ;(focusable[0] ?? panel).focus()
+  })
+}
+
+function onClose() {
+  if (lockedByThisInstance) {
+    lockedByThisInstance = false
+    openModalCount = Math.max(0, openModalCount - 1)
+    if (openModalCount === 0) {
+      document.body.style.overflow = ''
+    }
+  }
+  previouslyFocused?.focus?.()
+  previouslyFocused = null
+}
+
+watch(isOpen, (val) => {
+  if (val) {
+    isRendered.value = true
+    onOpen()
+  }
+  else {
+    onClose()
+  }
+})
+
+onMounted(() => {
+  if (isOpen.value) onOpen()
+})
+
+onBeforeUnmount(() => {
+  // If this instance is still holding a scroll-lock slot, release it.
+  if (lockedByThisInstance) {
+    lockedByThisInstance = false
+    openModalCount = Math.max(0, openModalCount - 1)
+    if (openModalCount === 0) {
+      document.body.style.overflow = ''
+    }
+  }
+})
+
+function onBackdropClick() {
+  if (props.dismissable) close()
+}
+
+function onKeydown(e: KeyboardEvent) {
+  if (e.key === 'Escape' && props.closeOnEscape) {
+    e.stopPropagation()
+    close()
+    return
+  }
+  if (e.key !== 'Tab') return
+
+  const panel = panelRef.value
+  if (!panel) return
+  const focusable = getFocusable(panel)
+  if (focusable.length === 0) {
+    e.preventDefault()
+    panel.focus()
+    return
+  }
+  const first = focusable[0]!
+  const last = focusable[focusable.length - 1]!
+  if (e.shiftKey && document.activeElement === first) {
+    e.preventDefault()
+    last.focus()
+  }
+  else if (!e.shiftKey && document.activeElement === last) {
+    e.preventDefault()
+    first.focus()
+  }
+}
+
+function close() {
+  if (!isControlled.value) localValue.value = false
+  emit('update:modelValue', false)
+  emit('close')
+}
+</script>
+
+<script lang="ts">
+// Shared across all MalioModal instances: only the last open modal releases the body scroll-lock.
+let openModalCount = 0
+</script>
+
+<style scoped>
+.modal-enter-active,
+.modal-leave-active {
+  transition: opacity 0.2s ease;
+}
+
+.modal-enter-active > div:last-child,
+.modal-leave-active > div:last-child {
+  transition: transform 0.2s ease;
+}
+
+.modal-enter-from,
+.modal-leave-to {
+  opacity: 0;
+}
+
+.modal-enter-from > div:last-child,
+.modal-leave-to > div:last-child {
+  transform: scale(0.95);
+}
+</style>

app/story/modal/modal.story.vue

@@ -0,0 +1,70 @@
+<script setup lang="ts">
+import { ref } from 'vue'
+
+defineOptions({ name: 'ModalStory' })
+
+const showBase = ref(false)
+const showForm = ref(false)
+const showNoDismiss = ref(false)
+</script>
+
+<template>
+  <Story title="Overlay/Modal">
+    <Variant title="Simple">
+      <div class="p-4">
+        <button
+          class="rounded bg-m-btn-primary px-4 py-2 text-white"
+          @click="showBase = true"
+        >
+          Ouvrir
+        </button>
+        <MalioModal v-model="showBase">
+          <template #header>
+            <h2 class="text-xl font-bold">Détails</h2>
+          </template>
+          <p>Contenu simple de la modal.</p>
+        </MalioModal>
+      </div>
+    </Variant>
+
+    <Variant title="Avec footer d'actions">
+      <div class="p-4">
+        <button
+          class="rounded bg-m-btn-primary px-4 py-2 text-white"
+          @click="showForm = true"
+        >
+          Ouvrir le formulaire
+        </button>
+        <MalioModal v-model="showForm" modal-class="max-w-lg">
+          <template #header>
+            <h2 class="text-xl font-bold">Nouveau contact</h2>
+          </template>
+          <div class="flex flex-col gap-4 py-2">
+            <MalioInputText label="Nom" />
+            <MalioInputText label="Prénom" />
+          </div>
+          <template #footer>
+            <MalioButton label="Enregistrer" button-class="flex-1" @click="showForm = false" />
+          </template>
+        </MalioModal>
+      </div>
+    </Variant>
+
+    <Variant title="Non dismissable">
+      <div class="p-4">
+        <button
+          class="rounded bg-m-btn-primary px-4 py-2 text-white"
+          @click="showNoDismiss = true"
+        >
+          Ouvrir
+        </button>
+        <MalioModal v-model="showNoDismiss" :dismissable="false" :close-on-escape="false">
+          <template #header>
+            <h2 class="text-xl font-bold">Action requise</h2>
+          </template>
+          <p>Ni le backdrop ni Échap ne ferment cette modal. Utilisez la croix.</p>
+        </MalioModal>
+      </div>
+    </Variant>
+  </Story>
+</template>

docs/superpowers/plans/2026-05-26-modal.md

@@ -0,0 +1,979 @@
+# MalioModal Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Ajouter un composant `MalioModal` (dialogue modal centré) autonome à `@malio/layer-ui`, sans modifier le Drawer existant.
+
+**Architecture:** Composant Vue SFC unique `app/components/malio/modal/Modal.vue`, auto-importé comme `<MalioModal>`. Réimplémente sa propre logique (Teleport, focus-trap, scroll-lock partagé via compteur module-level, pattern contrôlé/non-contrôlé, transition fade+scale) en s'inspirant du Drawer. Structure : header fixe / body scrollable / footer fixe.
+
+**Tech Stack:** Nuxt 4 layer, Vue 3 `<script setup lang="ts">`, Tailwind (tokens `m-*`), `tailwind-merge`, `@iconify/vue`, Vitest + `@vue/test-utils` (jsdom), Histoire.
+
+**Spec:** `docs/superpowers/specs/2026-05-26-modal-design.md`
+
+**Conventions projet à respecter :**
+- Commits Conventional **avec espace avant les `:`** : `feat : … (#MUI-36)`, `docs : …`, `test : …`. Type en minuscules, pas de préfixe `[#…]`. Finir par la ligne `Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>`.
+- Le hook pre-commit lance lint + ~595 tests et **time out de façon flaky** sous WSL2. Pattern : réessayer ; après 2 échecs flaky (échecs différents d'un run à l'autre), vérifier les tests ciblés à la main (`npx vitest run <chemin>`) puis committer avec `--no-verify`.
+- Story : nom de fichier sous un dossier (`story/modal/modal.story.vue`) ; `defineOptions({ name: 'ModalStory' })` pour éviter `vue/multi-word-component-names`.
+
+**File Structure:**
+- Create `app/components/malio/modal/Modal.vue` — le composant (≈ taille du Drawer).
+- Create `app/components/malio/modal/Modal.test.ts` — tests colocalisés.
+- Create `.playground/pages/composant/modal/modal.vue` — page de démo (route `/composant/modal/modal`).
+- Modify `.playground/playground.nav.ts` — ajout de l'entrée nav dans la section `NAVIGATION`.
+- Create `app/story/modal/modal.story.vue` — story Histoire.
+- Modify `COMPONENTS.md` — section `## MalioModal` (insérée après la section `## MalioDrawer`).
+- Modify `CHANGELOG.md` — ligne sous `### Added`.
+
+---
+
+### Task 1: Composant MalioModal + suite de tests (cycle TDD)
+
+**Files:**
+- Create: `app/components/malio/modal/Modal.test.ts`
+- Create: `app/components/malio/modal/Modal.vue`
+
+- [ ] **Step 1: Écrire la suite de tests qui échoue**
+
+Create `app/components/malio/modal/Modal.test.ts` :
+
+```ts
+import { afterEach, describe, expect, it } from 'vitest'
+import { enableAutoUnmount, mount } from '@vue/test-utils'
+import type { DefineComponent } from 'vue'
+import { Icon as IconifyIcon } from '@iconify/vue'
+import Modal from './Modal.vue'
+
+type ModalProps = {
+  id?: string
+  modelValue?: boolean
+  showClose?: boolean
+  dismissable?: boolean
+  closeOnEscape?: boolean
+  ariaLabel?: string
+  modalClass?: string
+  overlayClass?: string
+  headerClass?: string
+  bodyClass?: string
+  footerClass?: string
+}
+
+const ModalForTest = Modal as DefineComponent<ModalProps>
+
+function mountComponent(props: ModalProps = {}, slots?: Record<string, string>) {
+  return mount(ModalForTest, {
+    props,
+    slots,
+    global: { stubs: { Teleport: true } },
+  })
+}
+
+describe('MalioModal', () => {
+  enableAutoUnmount(afterEach)
+
+  afterEach(() => {
+    document.body.style.overflow = ''
+  })
+
+  it('does not render when modelValue is false', () => {
+    const wrapper = mountComponent({ modelValue: false })
+    expect(wrapper.find('[data-test="panel"]').exists()).toBe(false)
+  })
+
+  it('renders the panel when modelValue is true', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="panel"]').exists()).toBe(true)
+  })
+
+  it('centers the modal (items-center justify-center)', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    const root = wrapper.find('.fixed')
+    expect(root.classes()).toContain('items-center')
+    expect(root.classes()).toContain('justify-center')
+  })
+
+  it('renders default slot in the body', () => {
+    const wrapper = mountComponent(
+      { modelValue: true },
+      { default: '<p data-test="content">Contenu</p>' },
+    )
+    expect(wrapper.find('[data-test="body"] [data-test="content"]').text()).toBe('Contenu')
+  })
+
+  it('works in uncontrolled mode (defaults closed)', () => {
+    const wrapper = mountComponent()
+    expect(wrapper.find('[data-test="panel"]').exists()).toBe(false)
+  })
+
+  it('uses custom id when provided', () => {
+    const wrapper = mountComponent({ modelValue: true, id: 'my-modal' })
+    expect(wrapper.find('.fixed').attributes('id')).toBe('my-modal')
+  })
+
+  it('generates an id when not provided', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('.fixed').attributes('id')).toMatch(/^malio-modal-/)
+  })
+
+  it('has role="dialog" and aria-modal on the panel', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    const panel = wrapper.find('[data-test="panel"]')
+    expect(panel.attributes('role')).toBe('dialog')
+    expect(panel.attributes('aria-modal')).toBe('true')
+  })
+
+  it('applies modalClass to the panel', () => {
+    const wrapper = mountComponent({ modelValue: true, modalClass: 'max-w-2xl' })
+    expect(wrapper.find('[data-test="panel"]').classes()).toContain('max-w-2xl')
+  })
+
+  it('renders the #header slot inside the header bar', () => {
+    const wrapper = mountComponent(
+      { modelValue: true },
+      { header: '<h2 data-test="title">Titre</h2>' },
+    )
+    expect(wrapper.find('[data-test="header"] [data-test="title"]').text()).toBe('Titre')
+  })
+
+  it('renders the header bar when showClose is true even without #header', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="header"]').exists()).toBe(true)
+  })
+
+  it('does not render the header bar when no #header and showClose is false', () => {
+    const wrapper = mountComponent({ modelValue: true, showClose: false })
+    expect(wrapper.find('[data-test="header"]').exists()).toBe(false)
+  })
+
+  it('shows the close button by default', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="close-button"]').exists()).toBe(true)
+  })
+
+  it('hides the close button when showClose is false', () => {
+    const wrapper = mountComponent(
+      { modelValue: true, showClose: false },
+      { header: '<h2>Titre</h2>' },
+    )
+    expect(wrapper.find('[data-test="close-button"]').exists()).toBe(false)
+  })
+
+  it('close button renders mdi:cancel-bold icon', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    const icon = wrapper.findComponent(IconifyIcon)
+    expect(icon.props('icon')).toBe('mdi:cancel-bold')
+  })
+
+  it('close button has aria-label "Fermer"', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="close-button"]').attributes('aria-label')).toBe('Fermer')
+  })
+
+  it('emits update:modelValue false and close on close button click', async () => {
+    const wrapper = mountComponent({ modelValue: true })
+    await wrapper.find('[data-test="close-button"]').trigger('click')
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([false])
+    expect(wrapper.emitted('close')).toHaveLength(1)
+  })
+
+  it('sets aria-labelledby to the header id when #header is provided', () => {
+    const wrapper = mountComponent(
+      { modelValue: true, id: 'test-modal' },
+      { header: '<h2>Titre</h2>' },
+    )
+    const panel = wrapper.find('[data-test="panel"]')
+    expect(panel.attributes('aria-labelledby')).toBe('test-modal-header')
+    expect(wrapper.find('[data-test="header-content"]').attributes('id')).toBe('test-modal-header')
+  })
+
+  it('sets aria-label from ariaLabel when no #header is provided', () => {
+    const wrapper = mountComponent({ modelValue: true, ariaLabel: 'Boîte de dialogue' })
+    const panel = wrapper.find('[data-test="panel"]')
+    expect(panel.attributes('aria-label')).toBe('Boîte de dialogue')
+    expect(panel.attributes('aria-labelledby')).toBeUndefined()
+  })
+
+  it('applies headerClass to the header bar', () => {
+    const wrapper = mountComponent({ modelValue: true, headerClass: 'bg-m-primary' })
+    expect(wrapper.find('[data-test="header"]').classes()).toContain('bg-m-primary')
+  })
+
+  it('renders the #footer slot in a footer pinned below the body', () => {
+    const wrapper = mountComponent(
+      { modelValue: true },
+      { footer: '<button data-test="save">Enregistrer</button>' },
+    )
+    // le footer n'est PAS dans la zone scrollable (≠ Drawer)
+    expect(wrapper.find('[data-test="body"] [data-test="footer"]').exists()).toBe(false)
+    expect(wrapper.find('[data-test="footer"] [data-test="save"]').exists()).toBe(true)
+  })
+
+  it('does not render the footer when no #footer slot', () => {
+    const wrapper = mountComponent({ modelValue: true })
+    expect(wrapper.find('[data-test="footer"]').exists()).toBe(false)
+  })
+
+  it('applies bodyClass to the body', () => {
+    const wrapper = mountComponent({ modelValue: true, bodyClass: 'px-10' })
+    expect(wrapper.find('[data-test="body"]').classes()).toContain('px-10')
+  })
+
+  it('applies footerClass to the footer', () => {
+    const wrapper = mountComponent(
+      { modelValue: true, footerClass: 'justify-end' },
+      { footer: '<span>pied</span>' },
+    )
+    expect(wrapper.find('[data-test="footer"]').classes()).toContain('justify-end')
+  })
+
+  it('emits update:modelValue false and close on backdrop click (dismissable)', async () => {
+    const wrapper = mountComponent({ modelValue: true })
+    await wrapper.find('[data-test="backdrop"]').trigger('click')
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([false])
+    expect(wrapper.emitted('close')).toHaveLength(1)
+  })
+
+  it('does not close on backdrop click when dismissable is false', async () => {
+    const wrapper = mountComponent({ modelValue: true, dismissable: false })
+    await wrapper.find('[data-test="backdrop"]').trigger('click')
+    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
+  })
+
+  it('applies overlayClass to the backdrop', () => {
+    const wrapper = mountComponent({ modelValue: true, overlayClass: 'bg-black/70' })
+    expect(wrapper.find('[data-test="backdrop"]').classes()).toContain('bg-black/70')
+  })
+
+  it('closes on Escape key when closeOnEscape is true', async () => {
+    const wrapper = mountComponent({ modelValue: true })
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Escape' })
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([false])
+    expect(wrapper.emitted('close')).toHaveLength(1)
+  })
+
+  it('does not close on Escape when closeOnEscape is false', async () => {
+    const wrapper = mountComponent({ modelValue: true, closeOnEscape: false })
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Escape' })
+    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
+  })
+
+  it('locks body scroll when opened and restores it when closed', async () => {
+    const wrapper = mountComponent({ modelValue: false })
+    expect(document.body.style.overflow).toBe('')
+    await wrapper.setProps({ modelValue: true })
+    expect(document.body.style.overflow).toBe('hidden')
+    await wrapper.setProps({ modelValue: false })
+    expect(document.body.style.overflow).toBe('')
+  })
+
+  it('moves focus into the panel when opened', async () => {
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: false, showClose: false },
+      slots: { default: '<button data-test="first">OK</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.setProps({ modelValue: true })
+    await wrapper.vm.$nextTick()
+    const first = wrapper.find('[data-test="first"]').element
+    expect(document.activeElement).toBe(first)
+    wrapper.unmount()
+  })
+
+  it('restores focus to the trigger when closed', async () => {
+    const trigger = document.createElement('button')
+    document.body.appendChild(trigger)
+    trigger.focus()
+    expect(document.activeElement).toBe(trigger)
+
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: false },
+      slots: { default: '<button>OK</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.setProps({ modelValue: true })
+    await wrapper.vm.$nextTick()
+    await wrapper.setProps({ modelValue: false })
+    await wrapper.vm.$nextTick()
+    expect(document.activeElement).toBe(trigger)
+
+    wrapper.unmount()
+    trigger.remove()
+  })
+
+  it('wraps focus to the first element when Tab is pressed on the last element', async () => {
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: true, showClose: false },
+      slots: { default: '<button data-test="btn1">First</button><button data-test="btn2">Last</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.vm.$nextTick()
+    const last = wrapper.find('[data-test="btn2"]').element as HTMLElement
+    last.focus()
+    expect(document.activeElement).toBe(last)
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Tab' })
+    expect(document.activeElement).toBe(wrapper.find('[data-test="btn1"]').element)
+    wrapper.unmount()
+  })
+
+  it('wraps focus to the last element when Shift+Tab is pressed on the first element', async () => {
+    const wrapper = mount(ModalForTest, {
+      props: { modelValue: true, showClose: false },
+      slots: { default: '<button data-test="btn1">First</button><button data-test="btn2">Last</button>' },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    await wrapper.vm.$nextTick()
+    const first = wrapper.find('[data-test="btn1"]').element as HTMLElement
+    first.focus()
+    expect(document.activeElement).toBe(first)
+    await wrapper.find('[data-test="panel"]').trigger('keydown', { key: 'Tab', shiftKey: true })
+    expect(document.activeElement).toBe(wrapper.find('[data-test="btn2"]').element)
+    wrapper.unmount()
+  })
+
+  it('does not release body scroll-lock when one stacked modal closes while another is still open', async () => {
+    const wrapperA = mount(ModalForTest, {
+      props: { modelValue: false },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+    const wrapperB = mount(ModalForTest, {
+      props: { modelValue: false },
+      attachTo: document.body,
+      global: { stubs: { Teleport: true } },
+    })
+
+    await wrapperA.setProps({ modelValue: true })
+    expect(document.body.style.overflow).toBe('hidden')
+
+    await wrapperB.setProps({ modelValue: true })
+    expect(document.body.style.overflow).toBe('hidden')
+
+    await wrapperB.setProps({ modelValue: false })
+    expect(document.body.style.overflow).toBe('hidden')
+
+    await wrapperA.setProps({ modelValue: false })
+    expect(document.body.style.overflow).toBe('')
+  })
+})
+```
+
+- [ ] **Step 2: Lancer les tests pour vérifier qu'ils échouent**
+
+Run: `npx vitest run app/components/malio/modal/Modal.test.ts`
+Expected: FAIL — `Failed to resolve import "./Modal.vue"` (le composant n'existe pas encore).
+
+- [ ] **Step 3: Implémenter le composant**
+
+Create `app/components/malio/modal/Modal.vue` :
+
+```vue
+<template>
+  <Teleport to="body">
+    <Transition
+      name="modal"
+      appear
+      @after-leave="isRendered = false"
+    >
+      <div
+        v-if="isRendered && isOpen"
+        :id="componentId"
+        class="fixed inset-0 z-50 flex items-center justify-center p-4"
+        v-bind="attrs"
+      >
+        <div
+          :class="twMerge('absolute inset-0 bg-black/40', overlayClass)"
+          data-test="backdrop"
+          @click="onBackdropClick"
+        />
+
+        <div
+          ref="panelRef"
+          :class="twMerge(
+            'relative z-50 flex max-h-[85vh] w-full max-w-md flex-col rounded-malio bg-white',
+            modalClass,
+          )"
+          role="dialog"
+          aria-modal="true"
+          :aria-labelledby="hasHeader ? headerId : undefined"
+          :aria-label="hasHeader ? undefined : (ariaLabel || undefined)"
+          tabindex="-1"
+          data-test="panel"
+          @keydown="onKeydown"
+        >
+          <div
+            v-if="hasHeader || showClose"
+            :class="twMerge('flex shrink-0 items-center justify-between gap-4 px-5 py-[25px]', headerClass)"
+            data-test="header"
+          >
+            <div
+              :id="headerId"
+              class="min-w-0 flex-1"
+              data-test="header-content"
+            >
+              <slot name="header" />
+            </div>
+            <button
+              v-if="showClose"
+              type="button"
+              aria-label="Fermer"
+              class="flex h-8 w-8 shrink-0 cursor-pointer items-center justify-center rounded-full transition-colors hover:bg-m-surface"
+              data-test="close-button"
+              @click="close"
+            >
+              <IconifyIcon
+                icon="mdi:cancel-bold"
+                :width="16"
+                :height="16"
+              />
+            </button>
+          </div>
+          <div
+            :class="twMerge('flex-1 overflow-y-auto px-5', bodyClass)"
+            data-test="body"
+          >
+            <slot />
+          </div>
+          <div
+            v-if="$slots.footer"
+            :class="twMerge('flex shrink-0 items-center gap-3 border-t border-m-border px-5 py-4', footerClass)"
+            data-test="footer"
+          >
+            <slot name="footer" />
+          </div>
+        </div>
+      </div>
+    </Transition>
+  </Teleport>
+</template>
+
+<script setup lang="ts">
+import {
+  computed,
+  nextTick,
+  onBeforeUnmount,
+  onMounted,
+  ref,
+  useAttrs,
+  useId,
+  useSlots,
+  watch,
+} from 'vue'
+import { Icon as IconifyIcon } from '@iconify/vue'
+import { twMerge } from 'tailwind-merge'
+
+defineOptions({ name: 'MalioModal', inheritAttrs: false })
+
+const props = withDefaults(
+  defineProps<{
+    id?: string
+    modelValue?: boolean
+    showClose?: boolean
+    dismissable?: boolean
+    closeOnEscape?: boolean
+    ariaLabel?: string
+    modalClass?: string
+    overlayClass?: string
+    headerClass?: string
+    bodyClass?: string
+    footerClass?: string
+  }>(),
+  {
+    id: '',
+    modelValue: undefined,
+    showClose: true,
+    dismissable: true,
+    closeOnEscape: true,
+    ariaLabel: '',
+    modalClass: '',
+    overlayClass: '',
+    headerClass: '',
+    bodyClass: '',
+    footerClass: '',
+  },
+)
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', value: boolean): void
+  (e: 'close'): void
+}>()
+
+const attrs = useAttrs()
+const generatedId = useId()
+
+const componentId = computed(() => props.id || `malio-modal-${generatedId}`)
+
+const slots = useSlots()
+const headerId = computed(() => `${componentId.value}-header`)
+const hasHeader = computed(() => !!slots.header)
+
+const isControlled = computed(() => props.modelValue !== undefined)
+const localValue = ref(false)
+const isOpen = computed(() =>
+  isControlled.value ? props.modelValue! : localValue.value,
+)
+const isRendered = ref(isOpen.value)
+
+const panelRef = ref<HTMLElement | null>(null)
+
+let previouslyFocused: HTMLElement | null = null
+// Per-instance flag: true while this modal holds a scroll-lock count slot.
+let lockedByThisInstance = false
+
+function getFocusable(container: HTMLElement): HTMLElement[] {
+  return Array.from(
+    container.querySelectorAll<HTMLElement>(
+      'a[href], button:not([disabled]), textarea:not([disabled]), input:not([disabled]), select:not([disabled]), [tabindex]:not([tabindex="-1"]), [contenteditable]:not([contenteditable="false"])',
+    ),
+  ).filter((el) => el.tabIndex !== -1)
+}
+
+function onOpen() {
+  previouslyFocused = (document.activeElement as HTMLElement | null) ?? null
+  if (!lockedByThisInstance) {
+    lockedByThisInstance = true
+    openModalCount++
+    if (openModalCount === 1) {
+      document.body.style.overflow = 'hidden'
+    }
+  }
+  nextTick(() => {
+    const panel = panelRef.value
+    if (!panel) return
+    const focusable = getFocusable(panel)
+    ;(focusable[0] ?? panel).focus()
+  })
+}
+
+function onClose() {
+  if (lockedByThisInstance) {
+    lockedByThisInstance = false
+    openModalCount = Math.max(0, openModalCount - 1)
+    if (openModalCount === 0) {
+      document.body.style.overflow = ''
+    }
+  }
+  previouslyFocused?.focus?.()
+  previouslyFocused = null
+}
+
+watch(isOpen, (val) => {
+  if (val) {
+    isRendered.value = true
+    onOpen()
+  }
+  else {
+    onClose()
+  }
+})
+
+onMounted(() => {
+  if (isOpen.value) onOpen()
+})
+
+onBeforeUnmount(() => {
+  // If this instance is still holding a scroll-lock slot, release it.
+  if (lockedByThisInstance) {
+    lockedByThisInstance = false
+    openModalCount = Math.max(0, openModalCount - 1)
+    if (openModalCount === 0) {
+      document.body.style.overflow = ''
+    }
+  }
+})
+
+function onBackdropClick() {
+  if (props.dismissable) close()
+}
+
+function onKeydown(e: KeyboardEvent) {
+  if (e.key === 'Escape' && props.closeOnEscape) {
+    e.stopPropagation()
+    close()
+    return
+  }
+  if (e.key !== 'Tab') return
+
+  const panel = panelRef.value
+  if (!panel) return
+  const focusable = getFocusable(panel)
+  if (focusable.length === 0) {
+    e.preventDefault()
+    panel.focus()
+    return
+  }
+  const first = focusable[0]!
+  const last = focusable[focusable.length - 1]!
+  if (e.shiftKey && document.activeElement === first) {
+    e.preventDefault()
+    last.focus()
+  }
+  else if (!e.shiftKey && document.activeElement === last) {
+    e.preventDefault()
+    first.focus()
+  }
+}
+
+function close() {
+  if (!isControlled.value) localValue.value = false
+  emit('update:modelValue', false)
+  emit('close')
+}
+</script>
+
+<script lang="ts">
+// Shared across all MalioModal instances: only the last open modal releases the body scroll-lock.
+let openModalCount = 0
+</script>
+
+<style scoped>
+.modal-enter-active,
+.modal-leave-active {
+  transition: opacity 0.2s ease;
+}
+
+.modal-enter-active > div:last-child,
+.modal-leave-active > div:last-child {
+  transition: transform 0.2s ease, opacity 0.2s ease;
+}
+
+.modal-enter-from,
+.modal-leave-to {
+  opacity: 0;
+}
+
+.modal-enter-from > div:last-child,
+.modal-leave-to > div:last-child {
+  transform: scale(0.95);
+  opacity: 0;
+}
+</style>
+```
+
+- [ ] **Step 4: Lancer les tests pour vérifier qu'ils passent**
+
+Run: `npx vitest run app/components/malio/modal/Modal.test.ts`
+Expected: PASS — tous les tests (≈ 32) verts.
+
+- [ ] **Step 5: Lint**
+
+Run: `npm run lint`
+Expected: 0 erreur sur les fichiers du composant.
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add app/components/malio/modal/Modal.vue app/components/malio/modal/Modal.test.ts
+git commit -m "feat : composant Modal (#MUI-36)
+
+Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>"
+```
+(En cas de timeout flaky pre-commit, voir le pattern conventions en tête de plan : retry ×2 puis `--no-verify` après vérif ciblée `npx vitest run app/components/malio/modal/Modal.test.ts`.)
+
+---
+
+### Task 2: Page playground + entrée nav
+
+**Files:**
+- Create: `.playground/pages/composant/modal/modal.vue`
+- Modify: `.playground/playground.nav.ts` (section `NAVIGATION`, après le Drawer)
+
+- [ ] **Step 1: Créer la page de démo**
+
+Create `.playground/pages/composant/modal/modal.vue` :
+
+```vue
+<script setup lang="ts">
+import { ref } from 'vue'
+
+const modalBase = ref(false)
+const modalForm = ref(false)
+const modalLong = ref(false)
+const modalNoDismiss = ref(false)
+</script>
+
+<template>
+  <div class="grid grid-cols-1 items-start gap-6 md:grid-cols-2">
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Modal simple</h2>
+      <MalioButton label="Ouvrir" @click="modalBase = true" />
+      <MalioModal v-model="modalBase">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Détails</h2>
+        </template>
+        <p class="text-m-text">Contenu de la modal. Échap, clic backdrop et croix la ferment.</p>
+      </MalioModal>
+    </div>
+
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Avec footer d'actions</h2>
+      <MalioButton label="Ouvrir le formulaire" variant="tertiary" @click="modalForm = true" />
+      <MalioModal v-model="modalForm" modal-class="max-w-lg">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Nouveau contact</h2>
+        </template>
+        <div class="flex flex-col gap-4 py-2">
+          <MalioInputText label="Nom" />
+          <MalioInputText label="Prénom" />
+          <MalioInputText label="Email" />
+        </div>
+        <template #footer>
+          <MalioButton label="Annuler" variant="secondary" button-class="flex-1" @click="modalForm = false" />
+          <MalioButton label="Enregistrer" button-class="flex-1" @click="modalForm = false" />
+        </template>
+      </MalioModal>
+    </div>
+
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Contenu long (body scrollable)</h2>
+      <MalioButton label="Ouvrir" variant="tertiary" @click="modalLong = true" />
+      <MalioModal v-model="modalLong">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Conditions</h2>
+        </template>
+        <div class="flex flex-col gap-4">
+          <p v-for="n in 20" :key="n" class="text-m-text">
+            Paragraphe {{ n }} — contenu long pour forcer le scroll interne ; le header et le footer restent fixes.
+          </p>
+        </div>
+        <template #footer>
+          <MalioButton label="Accepter" button-class="w-full" @click="modalLong = false" />
+        </template>
+      </MalioModal>
+    </div>
+
+    <div class="rounded-lg border p-6">
+      <h2 class="mb-6 text-xl font-bold">Non dismissable (croix uniquement)</h2>
+      <MalioButton label="Ouvrir" variant="danger" @click="modalNoDismiss = true" />
+      <MalioModal v-model="modalNoDismiss" :dismissable="false" :close-on-escape="false">
+        <template #header>
+          <h2 class="text-[24px] font-bold text-black">Action requise</h2>
+        </template>
+        <p class="text-m-text">Ni le backdrop ni Échap ne ferment cette modal. Utilisez la croix.</p>
+      </MalioModal>
+    </div>
+  </div>
+</template>
+```
+
+- [ ] **Step 2: Ajouter l'entrée nav**
+
+Modify `.playground/playground.nav.ts`, dans la section `NAVIGATION`, ajouter la ligne Modal juste après le Drawer :
+
+```ts
+  {
+    label: 'NAVIGATION',
+    icon: 'mdi:navigation-variant',
+    items: [
+      {label: 'Sidebar', to: '/composant/sidebar/sidebar'},
+      {label: 'Drawer', to: '/composant/drawer/drawer'},
+      {label: 'Modal', to: '/composant/modal/modal'},
+      {label: 'Onglets', to: '/composant/tab/tabList'},
+    ],
+  },
+```
+
+- [ ] **Step 3: Vérifier le lint**
+
+Run: `npm run lint`
+Expected: 0 erreur.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add .playground/pages/composant/modal/modal.vue .playground/playground.nav.ts
+git commit -m "docs : page playground Modal (#MUI-36)
+
+Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>"
+```
+
+---
+
+### Task 3: Story Histoire
+
+**Files:**
+- Create: `app/story/modal/modal.story.vue`
+
+- [ ] **Step 1: Créer la story**
+
+Create `app/story/modal/modal.story.vue` :
+
+```vue
+<script setup lang="ts">
+import { ref } from 'vue'
+
+defineOptions({ name: 'ModalStory' })
+
+const showBase = ref(false)
+const showForm = ref(false)
+const showNoDismiss = ref(false)
+</script>
+
+<template>
+  <Story title="Overlay/Modal">
+    <Variant title="Simple">
+      <div class="p-4">
+        <button
+          class="rounded bg-m-btn-primary px-4 py-2 text-white"
+          @click="showBase = true"
+        >
+          Ouvrir
+        </button>
+        <MalioModal v-model="showBase">
+          <template #header>
+            <h2 class="text-xl font-bold">Détails</h2>
+          </template>
+          <p>Contenu simple de la modal.</p>
+        </MalioModal>
+      </div>
+    </Variant>
+
+    <Variant title="Avec footer d'actions">
+      <div class="p-4">
+        <button
+          class="rounded bg-m-btn-primary px-4 py-2 text-white"
+          @click="showForm = true"
+        >
+          Ouvrir le formulaire
+        </button>
+        <MalioModal v-model="showForm" modal-class="max-w-lg">
+          <template #header>
+            <h2 class="text-xl font-bold">Nouveau contact</h2>
+          </template>
+          <div class="flex flex-col gap-4 py-2">
+            <MalioInputText label="Nom" />
+            <MalioInputText label="Prénom" />
+          </div>
+          <template #footer>
+            <MalioButton label="Enregistrer" button-class="flex-1" @click="showForm = false" />
+          </template>
+        </MalioModal>
+      </div>
+    </Variant>
+
+    <Variant title="Non dismissable">
+      <div class="p-4">
+        <button
+          class="rounded bg-m-btn-primary px-4 py-2 text-white"
+          @click="showNoDismiss = true"
+        >
+          Ouvrir
+        </button>
+        <MalioModal v-model="showNoDismiss" :dismissable="false" :close-on-escape="false">
+          <template #header>
+            <h2 class="text-xl font-bold">Action requise</h2>
+          </template>
+          <p>Ni le backdrop ni Échap ne ferment cette modal. Utilisez la croix.</p>
+        </MalioModal>
+      </div>
+    </Variant>
+  </Story>
+</template>
+```
+
+- [ ] **Step 2: Vérifier le lint**
+
+Run: `npm run lint`
+Expected: 0 erreur (notamment pas de `vue/multi-word-component-names` grâce au `defineOptions`).
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add app/story/modal/modal.story.vue
+git commit -m "docs : story Histoire Modal (#MUI-36)
+
+Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>"
+```
+
+---
+
+### Task 4: Documentation (COMPONENTS.md + CHANGELOG.md)
+
+**Files:**
+- Modify: `COMPONENTS.md` (insérer après la section `## MalioDrawer`, juste avant `## MalioDataTable`)
+- Modify: `CHANGELOG.md` (ligne sous `### Added`)
+
+- [ ] **Step 1: Ajouter la section dans COMPONENTS.md**
+
+Dans `COMPONENTS.md`, insérer ce bloc juste après le `---` qui clôt la section `## MalioDrawer` (et avant `## MalioDataTable`) :
+
+```markdown
+## MalioModal
+
+Boîte de dialogue modale centrée avec backdrop semi-transparent. Gère l'accessibilité (focus-trap, restitution du focus, `Échap`), le verrouillage du scroll de la page et un empilement correct de plusieurs modals. Structure : header fixe, body scrollable (`max-h-[85vh]`), footer fixe.
+
+| Prop | Type | Défaut | Description |
+|------|------|--------|-------------|
+| `id` | `string` | auto | Identifiant HTML |
+| `modelValue` | `boolean` | `undefined` | État ouvert/fermé (v-model) |
+| `showClose` | `boolean` | `true` | Afficher le bouton de fermeture (croix) |
+| `dismissable` | `boolean` | `true` | Fermer au clic sur le backdrop |
+| `closeOnEscape` | `boolean` | `true` | Fermer avec la touche `Échap` |
+| `ariaLabel` | `string` | `''` | Nom accessible de secours quand le slot `#header` est absent |
+| `modalClass` | `string` | `''` | Classes CSS panneau, ex. largeur `max-w-lg` (twMerge) |
+| `overlayClass` | `string` | `''` | Classes CSS backdrop (twMerge) |
+| `headerClass` | `string` | `''` | Classes CSS barre header (twMerge) |
+| `bodyClass` | `string` | `''` | Classes CSS zone scrollable (twMerge) |
+| `footerClass` | `string` | `''` | Classes CSS footer fixe (twMerge) |
+
+**Events :** `update:modelValue(value: boolean)`, `close()`
+
+**Slots :**
+- `header` — en-tête (titre, etc.). S'il est absent et que `showClose` est `true`, seule la croix est affichée.
+- `default` — contenu (zone scrollable).
+- `footer` — actions (boutons). Rendu en bas, fixe, séparé par une bordure. N'apparaît que si le slot est fourni.
+
+```vue
+<MalioModal v-model="isOpen">
+  <template #header>
+    <h2 class="text-[24px] font-bold">Détails</h2>
+  </template>
+  <p>Contenu de la modal</p>
+</MalioModal>
+
+<!-- Largeur custom + footer d'actions -->
+<MalioModal v-model="isOpen" modal-class="max-w-lg">
+  <template #header><h2>Nouveau contact</h2></template>
+  <MalioInputText label="Nom" />
+  <template #footer>
+    <MalioButton label="Annuler" variant="secondary" button-class="flex-1" @click="isOpen = false" />
+    <MalioButton label="Enregistrer" button-class="flex-1" @click="isOpen = false" />
+  </template>
+</MalioModal>
+
+<!-- Non fermable au backdrop / Échap (croix uniquement) -->
+<MalioModal v-model="isOpen" :dismissable="false" :close-on-escape="false">
+  <template #header><h2>Action requise</h2></template>
+  <p>Fermeture via la croix uniquement</p>
+</MalioModal>
+```
+
+---
+```
+
+- [ ] **Step 2: Ajouter l'entrée CHANGELOG**
+
+Dans `CHANGELOG.md`, sous `### Added`, ajouter en dernière ligne de la liste (après la ligne DateTime) :
+
+```markdown
+* [#MUI-36] Création d'un composant modal (dialogue centré, focus-trap, scroll-lock, footer fixe)
+```
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add COMPONENTS.md CHANGELOG.md
+git commit -m "docs : documentation du composant Modal (#MUI-36)
+
+Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>"
+```
+
+---
+
+## Vérification finale
+
+- [ ] `npx vitest run app/components/malio/modal/Modal.test.ts` → tous verts.
+- [ ] `npm run lint` → 0 erreur.
+- [ ] `npm run dev` → la page `/composant/modal/modal` s'affiche, l'entrée « Modal » est dans la nav sous NAVIGATION, les 4 démos fonctionnent (ouverture, fermeture backdrop/Échap/croix, scroll interne, non-dismissable).

docs/superpowers/specs/2026-05-26-modal-design.md

@@ -0,0 +1,109 @@
+# Design — `MalioModal`
+
+Date : 2026-05-26
+Statut : validé
+
+## Objectif
+
+Ajouter un composant `MalioModal` à `@malio/layer-ui` : un dialogue modal centré sur fond
+assombri. Périmètre initial = **shell générique seul** (pas de variante confirmation/alerte).
+Le consommateur place ce qu'il veut dans les slots.
+
+## Décisions clés
+
+- **Composant autonome** : la Modal réimplémente sa propre logique en s'inspirant du Drawer,
+  **sans modifier le Drawer existant** (zéro risque de régression). Un éventuel refactor vers
+  un composable partagé Drawer/Modal pourra se faire plus tard.
+- **Largeur unique + override** : une largeur par défaut (`max-w-md`), ajustable par le
+  consommateur via la prop `modalClass` (pas de prop `size`).
+- **Footer fixe en bas** : header fixe en haut, body scrollable au milieu (`max-h-[85vh]`),
+  footer fixe en bas séparé par une bordure — structure modale classique (≠ Drawer où le footer
+  est dans la zone scrollable).
+- **Front volontairement simple** pour cette première version.
+
+## Emplacement & livrables
+
+- `app/components/malio/modal/Modal.vue`
+- `app/components/malio/modal/Modal.test.ts` (colocalisé, jsdom)
+- Page playground `.playground/pages/composant/modal/modal.vue`
+- Entrée nav : `{label: 'Modal', to: '/composant/modal/modal'}` ajoutée dans la section
+  **NAVIGATION** de `.playground/playground.nav.ts`, juste après le Drawer
+- Story Histoire `app/story/modal.story.vue`
+- Mise à jour `COMPONENTS.md` (API) et `CHANGELOG.md` (`### Added`)
+
+## Structure (template)
+
+```
+Teleport to body
+ └ Transition (fade overlay + fade/scale du panneau)
+    └ div fixed inset-0 z-50 flex items-center justify-center p-4   ← centre la modal
+       ├ div backdrop (bg-black/40, @click → si dismissable)
+       └ div panel (role=dialog, aria-modal, w-full max-w-md max-h-[85vh], flex flex-col)
+          ├ header (slot #header + bouton fermer)   ← shrink-0, rendu si slot OU showClose
+          ├ body   (slot par défaut)                ← flex-1 overflow-y-auto
+          └ footer (slot #footer, bordure haute)    ← shrink-0, rendu si slot #footer présent
+```
+
+## API
+
+### Props
+
+| Prop | Type | Défaut | Rôle |
+|------|------|--------|------|
+| `id` | `string` | `''` | id du composant (sinon généré via `useId`) |
+| `modelValue` | `boolean` | `undefined` | ouverture (contrôlé) ; fallback `localValue` interne si non fourni |
+| `showClose` | `boolean` | `true` | affiche le bouton de fermeture (croix) dans le header |
+| `dismissable` | `boolean` | `true` | clic sur le backdrop ferme la modal |
+| `closeOnEscape` | `boolean` | `true` | touche Échap ferme la modal |
+| `ariaLabel` | `string` | `''` | label ARIA si pas de slot header |
+| `modalClass` | `string` | `''` | override du panneau (ex. largeur `max-w-lg`) |
+| `overlayClass` | `string` | `''` | override du backdrop |
+| `headerClass` | `string` | `''` | override du header |
+| `bodyClass` | `string` | `''` | override du body |
+| `footerClass` | `string` | `''` | override du footer |
+
+Mêmes props que le Drawer, **sans `side`** ; `drawerClass` → `modalClass`.
+
+### Events
+
+- `update:modelValue(value: boolean)` — pour le `v-model`
+- `close()` — émis à chaque fermeture (croix, backdrop, Échap, fermeture programmatique)
+
+### Slots
+
+- `#header` — contenu du header (titre…). Si absent **et** `showClose=false`, header non rendu.
+- *(défaut)* — corps de la modal (zone scrollable)
+- `#footer` — pied (boutons d'action). Rendu uniquement si le slot est fourni.
+
+## Comportements repris du Drawer
+
+- **Teleport** vers `<body>`.
+- **Focus-trap** : focus initial sur le 1er élément focusable (sinon le panneau) ; boucle
+  Tab / Shift+Tab ; restauration du focus précédent à la fermeture.
+- **Scroll-lock partagé** : compteur module-level (`openModalCount`) — `overflow:hidden` sur
+  `<body>` tant qu'au moins une instance est ouverte, libéré par la dernière (gère aussi
+  `onBeforeUnmount`).
+- **Pattern contrôlé / non-contrôlé** : `isControlled = computed(() => modelValue !== undefined)`
+  avec `localValue` en fallback ; `isRendered` pour démonter après la transition de sortie.
+- **`defineOptions({ name: 'MalioModal', inheritAttrs: false })`** + `v-bind="attrs"` sur le
+  conteneur.
+- **Transition** : fade de l'overlay + fade léger **et scale** (`scale-95 → scale-100`) du
+  panneau (remplace le translate latéral du Drawer).
+
+## Accessibilité
+
+`role="dialog"`, `aria-modal="true"`, `aria-labelledby` vers l'id du header si présent (sinon
+`aria-label`), bouton fermer avec `aria-label="Fermer"`.
+
+## Tests (Vitest + @vue/test-utils, jsdom, colocalisés)
+
+- Rendu conditionnel (fermé → non rendu ; ouvert → panneau + backdrop).
+- `v-model` / contrôlé vs non-contrôlé.
+- Fermeture : croix, backdrop (selon `dismissable`), Échap (selon `closeOnEscape`) ; events
+  `update:modelValue(false)` + `close`.
+- Slots header / défaut / footer (footer rendu seulement si fourni ; header rendu si slot OU
+  `showClose`).
+- Accessibilité : `role`, `aria-modal`, `aria-labelledby`/`aria-label`.
+- Focus-trap : focus initial, boucle Tab/Shift+Tab.
+- Scroll-lock : `overflow:hidden` à l'ouverture, libéré à la fermeture (et avec instances
+  multiples).