- POST /envios/erp/sync-now?ventana_min=N calls sync_recientes with configurable window - sync_recientes() now returns a result dict (ok, total, created, updated, skipped, errores, detalle) - ERP tab shows a "Prueba manual" card with ventana selector (2m / 30m / 2h / hoy) and result breakdown Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>