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.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -914,6 +914,15 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@lucide/vue": {
+      "version": "1.21.0",
+      "resolved": "https://registry.npmjs.org/@lucide/vue/-/vue-1.21.0.tgz",
+      "integrity": "sha512-eoFn3tppjKAc12ZqdnRSMFdtwQ1ZMRQFb6SV1Eub6Y8kU28ccnqKeSFdnur9hMg8gIbosU2Y3WFJr/J/xS/IlQ==",
+      "license": "ISC",
+      "peerDependencies": {
+        "vue": ">=3.0.1"
+      }
+    },
     "node_modules/@lukeed/ms": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/@lukeed/ms/-/ms-2.0.2.tgz",
@@ -4995,6 +5004,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@arboretum/shared": "*",
+        "@lucide/vue": "^1.21.0",
         "@xterm/addon-fit": "^0.11.0",
         "@xterm/addon-webgl": "^0.19.0",
         "@xterm/xterm": "^6.0.0",