feat: refonte UX du dashboard (coquille, tri/filtre/pagination, ⌘K, toasts)

Refonte front (packages/web) : coquille applicative partagée (sidebar desktop +
barre d'onglets mobile + PageHeader, langue/push/logout centralisés) pilotée par
route.meta.layout ; design system (BaseButton/BaseBadge/SegmentedControl/EmptyState/
SkeletonRow, anneau de focus, icônes @lucide/vue) ; tri/filtre/recherche/pagination
côté client via useListControls (+ synchro URL) sur sessions/worktrees/groupes ;
section « À traiter », palette de commandes ⌘K, toasts. Aucune modif serveur/protocole/DB.

packages/web/src/components/layout/MoreSheet.vue

@@ -0,0 +1,24 @@
+<template>
+  <Teleport to="body">
+    <div class="fixed inset-0 z-50 md:hidden" role="dialog" aria-modal="true">
+      <div class="absolute inset-0 bg-black/60" @click="emit('close')" />
+      <div
+        class="absolute inset-x-0 bottom-0 rounded-t-2xl border-t border-zinc-800 bg-zinc-900 p-4 shadow-pop"
+        style="padding-bottom: calc(1rem + env(safe-area-inset-bottom))"
+      >
+        <div class="mx-auto mb-3 h-1 w-10 rounded-full bg-zinc-700" />
+        <AppShellFooter />
+        <BaseButton class="mt-3 w-full" @click="emit('close')">{{ t('common.close') }}</BaseButton>
+      </div>
+    </div>
+  </Teleport>
+</template>
+
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n';
+import AppShellFooter from './AppShellFooter.vue';
+import BaseButton from '../ui/BaseButton.vue';
+
+const { t } = useI18n();
+const emit = defineEmits<{ close: [] }>();
+</script>