- manifest + icones, service worker (precache, network-first, Background Sync) - module client FlowOffline (IndexedDB, queue, delta, flush) + hook editeur - endpoints /api/v2/sync/{delta,batch,status} + moteur de sync (conflits LWW/orpheline/copie offline) - migrations offline_sync_queue + sync_version (triggers) - UI offline (banner, badge sync, toasts, icone dirty) + doc /help - tests pytest (sync, migrations, SW, offline) + E2E Playwright; bump 6.0.0