diff --git a/frontend/app/layouts/default.vue b/frontend/app/layouts/default.vue
index 05c26a6..c1eb98f 100644
--- a/frontend/app/layouts/default.vue
+++ b/frontend/app/layouts/default.vue
@@ -1,107 +1,27 @@
 <template>
     <div class="h-screen overflow-hidden">
         <div class="flex h-full">
-            <!-- Mobile sidebar overlay -->
-            <Transition name="sidebar-overlay">
-                <div
-                    v-if="ui.sidebarOpen"
-                    class="fixed inset-0 z-40 bg-black/50 lg:hidden"
-                    @click="ui.closeMobileSidebar()"
-                />
-            </Transition>
-
-            <aside
-                class="fixed inset-y-0 left-0 z-50 flex h-full flex-shrink-0 flex-col border-r border-neutral-200 bg-tertiary-500 transition-transform duration-300 lg:static lg:z-auto lg:translate-x-0"
-                :class="[
-                    ui.sidebarCollapsed ? 'lg:w-16' : 'lg:w-64',
-                    ui.sidebarOpen ? 'w-64 translate-x-0' : '-translate-x-full',
-                ]"
+            <MalioSidebar
+                v-model="ui.sidebarCollapsed"
+                :sections="mergedSections"
+                :sidebar-class="ui.sidebarCollapsed ? '' : 'w-[232px]'"
             >
-                <div class="flex items-center overflow-hidden" :class="sidebarIsCollapsed ? 'justify-center p-3' : 'justify-between'">
-                    <img
-                        v-if="!sidebarIsCollapsed"
-                        src="/malio.png"
-                        alt="Logo"
-                        class="w-auto"
-                    />
-                    <img
-                        v-else
-                        src="/LOGO_CARRE.png"
-                        alt="Logo"
-                        class="w-[46px] h-[55px]"
-                    />
-                    <button
-                        class="mr-2 rounded-md p-2 text-neutral-500 hover:bg-neutral-200 hover:text-neutral-700 transition-colors lg:hidden"
-                        @click="ui.closeMobileSidebar()"
-                    >
-                        <Icon name="mdi:close" size="20" />
-                    </button>
-                </div>
-                <nav class="flex-1 overflow-hidden" :class="sidebarIsCollapsed ? 'px-1 pb-6' : 'px-4 pb-6'">
-                    <!-- Sections dynamiques (/api/sidebar) : navigation globale + sections gated par rôle -->
-                    <template v-for="(section, sIndex) in translatedSections" :key="section.label">
-                        <p v-if="!sidebarIsCollapsed" class="px-4 pt-5 pb-1 text-xs font-semibold uppercase tracking-wider text-neutral-400">
-                            {{ section.label }}
-                        </p>
-                        <div v-else class="mx-2 my-3 border-t border-secondary-500" />
-                        <SidebarLink
-                            v-for="item in section.items"
-                            :key="item.to"
-                            :to="item.to"
-                            :icon="item.icon"
-                            :label="item.label"
-                            :collapsed="sidebarIsCollapsed"
-                            @click="ui.closeMobileSidebar()"
-                        />
-
-                        <!-- Items conservés côté client, insérés après la 1re section (cf. décision 3) -->
-                        <template v-if="sIndex === 0">
-                            <!-- Contextuel projet -->
-                            <template v-if="currentProjectId">
-                                <SidebarLink :to="`/projects/${currentProjectId}`" icon="mdi:view-column-outline" label="Kanban" :collapsed="sidebarIsCollapsed" sub exact @click="ui.closeMobileSidebar()" />
-                                <SidebarLink :to="`/projects/${currentProjectId}/groups`" icon="mdi:tag-multiple-outline" label="Groupes" :collapsed="sidebarIsCollapsed" sub @click="ui.closeMobileSidebar()" />
-                                <SidebarLink :to="`/projects/${currentProjectId}/archives`" icon="mdi:archive-outline" label="Archives" :collapsed="sidebarIsCollapsed" sub @click="ui.closeMobileSidebar()" />
-                            </template>
-                            <!-- Feature-flag : Documents -->
-                            <SidebarLink v-if="isDocumentsVisible" to="/documents" icon="mdi:folder-network-outline" :label="$t('sharedFiles.sidebar.title')" :collapsed="sidebarIsCollapsed" @click="ui.closeMobileSidebar()" />
-                            <!-- Feature-flag : Mail + badge -->
-                            <div v-if="isMailVisible" class="relative">
-                                <SidebarLink to="/mail" icon="mdi:email-outline" :label="$t('mail.sidebar.title')" :collapsed="sidebarIsCollapsed" @click="ui.closeMobileSidebar()" />
-                                <span
-                                    v-if="mailStore.globalUnreadCount > 0"
-                                    class="pointer-events-none absolute right-3 top-1/2 flex h-5 min-w-5 -translate-y-1/2 items-center justify-center rounded-full bg-red-500 px-1 text-xs font-bold text-white"
-                                    :class="{ 'right-1 top-1 translate-y-0': sidebarIsCollapsed }"
-                                    :aria-label="`${mailStore.globalUnreadCount} messages non lus`"
-                                >
-                                    {{ mailStore.globalUnreadCount > 99 ? '99+' : mailStore.globalUnreadCount }}
-                                </span>
-                            </div>
-                            <!-- User-flag : Mes absences (isEmployee — non couvert par le gate rôle) -->
-                            <SidebarLink v-if="isEmployee" to="/absences" icon="mdi:umbrella-beach-outline" label="Mes absences" :collapsed="sidebarIsCollapsed" @click="ui.closeMobileSidebar()" />
-                        </template>
-                    </template>
-                </nav>
-
-                <div class="px-4 py-3">
-                    <SidebarTimer :collapsed="sidebarIsCollapsed" />
-                </div>
-
-                <div class="flex items-center justify-center p-4">
-                    <p v-if="!sidebarIsCollapsed" class="font-bold">v {{ version }}</p>
-                </div>
-
-                <!-- Collapse toggle button centered vertically on the sidebar edge -->
-                <button
-                    class="absolute top-1/2 -right-4 z-10 hidden h-8 w-8 -translate-y-1/2 items-center justify-center rounded-full border border-neutral-200 bg-white text-neutral-400 shadow-sm hover:text-neutral-700 transition-colors lg:flex"
-                    :title="ui.sidebarCollapsed ? 'Ouvrir le menu' : 'Réduire le menu'"
-                    @click="ui.toggleSidebar()"
-                >
-                    <Icon
-                        :name="ui.sidebarCollapsed ? 'mdi:chevron-right' : 'mdi:chevron-left'"
-                        size="18"
-                    />
-                </button>
-            </aside>
+                <template #logo>
+                    <img src="/LOGO_MALIO.png" alt="Malio"/>
+                </template>
+                <template #logo-collapsed>
+                    <img src="/LOGO_MALIO_COLLAPSED.png" alt="Malio"/>
+                </template>
+                <template #footer>
+                    <div class="flex flex-col gap-2">
+                        <SidebarTimer :collapsed="false" />
+                        <p v-if="version" class="text-center text-sm font-bold">v {{ version }}</p>
+                    </div>
+                </template>
+                <template #footer-collapsed>
+                    <SidebarTimer :collapsed="true" />
+                </template>
+            </MalioSidebar>
 
             <div class="h-full flex-1 flex flex-col min-h-0 min-w-0">
                 <AppTopNav :user="auth.user" />
@@ -138,23 +58,6 @@ const route = useRoute()
 const { t } = useI18n()
 const { sections } = useSidebar()
 
-// `/mail` est déclaré dans config/sidebar.php pour le gating module (disabledRoutes),
-// mais son rendu visuel + badge non-lus est géré manuellement ci-dessous (feature-flag Mail).
-// On le filtre des sections dynamiques pour éviter un doublon dans la nav.
-const translatedSections = computed(() =>
-    sections.value.map((section) => ({
-        label: t(section.label),
-        icon: section.icon,
-        items: section.items
-            .filter((item) => item.to !== '/mail')
-            .map((item) => ({
-                label: t(item.label),
-                to: item.to,
-                icon: item.icon,
-            })),
-    })),
-)
-
 const isEmployee = computed(() => Boolean(auth.user?.isEmployee))
 
 const isMailVisible = computed(() => {
@@ -165,12 +68,6 @@ const isMailVisible = computed(() => {
 const { enabled: shareEnabled, ensureLoaded: ensureShareStatus } = useShareStatus()
 const isDocumentsVisible = computed(() => shareEnabled.value === true)
 
-// On mobile, sidebar is always expanded (not collapsed icon mode)
-const sidebarIsCollapsed = computed(() => {
-    if (ui.sidebarOpen) return false
-    return ui.sidebarCollapsed
-})
-
 // Close mobile sidebar on route change
 watch(() => route.path, () => {
     ui.closeMobileSidebar()
@@ -181,6 +78,92 @@ const currentProjectId = computed(() => {
     return match ? match[1] : null
 })
 
+type MalioItem = { label: string; to: string; exact?: boolean }
+type MalioSection = { label: string; icon: string; items: MalioItem[] }
+
+// Ordre d'affichage canonique des sections.
+const SECTION_ORDER = [
+    'sidebar.general.section',
+    'sidebar.tools.section',
+    'sidebar.admin.section',
+] as const
+
+// Icônes de secours pour les sections créées côté client (absentes du backend,
+// ex. module mail off mais partage actif → section Outils à recréer).
+const SECTION_ICON: Record<string, string> = {
+    'sidebar.general.section': 'mdi:view-dashboard-outline',
+    'sidebar.tools.section': 'mdi:tools',
+    'sidebar.admin.section': 'mdi:cog-outline',
+}
+
+// Items rendus côté client (dépendent d'un état runtime ignoré du backend).
+function clientItemsFor(key: string): MalioItem[] {
+    if (key === 'sidebar.general.section') {
+        const items: MalioItem[] = []
+        if (currentProjectId.value) {
+            const id = currentProjectId.value
+            items.push({ label: t('sidebar.project.kanban'), to: `/projects/${id}`, exact: true })
+            items.push({ label: t('sidebar.project.groups'), to: `/projects/${id}/groups` })
+            items.push({ label: t('sidebar.project.archives'), to: `/projects/${id}/archives` })
+        }
+        if (isEmployee.value) {
+            items.push({ label: t('sidebar.general.myAbsences'), to: '/absences' })
+        }
+        return items
+    }
+    if (key === 'sidebar.tools.section') {
+        const items: MalioItem[] = []
+        if (isMailVisible.value) {
+            const n = mailStore.globalUnreadCount
+            const suffix = n > 0 ? ` (${n > 99 ? '99+' : n})` : ''
+            items.push({ label: `${t('mail.sidebar.title')}${suffix}`, to: '/mail' })
+        }
+        if (isDocumentsVisible.value) {
+            items.push({ label: t('sharedFiles.sidebar.title'), to: '/documents' })
+        }
+        return items
+    }
+    return []
+}
+
+const mergedSections = computed<MalioSection[]>(() => {
+    // 1. Sections backend (déjà filtrées par permissions), mail retiré (ré-injecté côté client).
+    const backend = new Map<string, MalioSection>()
+    for (const section of sections.value) {
+        backend.set(section.label, {
+            label: t(section.label),
+            icon: section.icon,
+            items: section.items
+                .filter((item) => item.to !== '/mail')
+                .map((item) => ({ label: t(item.label), to: item.to })),
+        })
+    }
+
+    // 2. Fusion dans l'ordre canonique.
+    const result: MalioSection[] = []
+    for (const key of SECTION_ORDER) {
+        const base = backend.get(key)
+        const extra = clientItemsFor(key)
+        if (base) {
+            base.items.push(...extra)
+            if (base.items.length > 0) {
+                result.push(base)
+            }
+        } else if (extra.length > 0) {
+            result.push({ label: t(key), icon: SECTION_ICON[key] ?? '', items: extra })
+        }
+    }
+
+    // 3. Garde-fou : toute section backend hors ordre canonique n'est pas perdue.
+    for (const [key, section] of backend) {
+        if (!(SECTION_ORDER as readonly string[]).includes(key) && section.items.length > 0) {
+            result.push(section)
+        }
+    }
+
+    return result
+})
+
 const timerStore = useTimerStore()
 
 const baseTitle = ref('Lesstime')
@@ -268,14 +251,3 @@ function onCompleteSaved() {
     })
 }
 </script>
-
-<style scoped>
-.sidebar-overlay-enter-active,
-.sidebar-overlay-leave-active {
-    transition: opacity 0.3s ease;
-}
-.sidebar-overlay-enter-from,
-.sidebar-overlay-leave-to {
-    opacity: 0;
-}
-</style>