- Arregla @require_auth, permisos, race conditions, locks de caja/stock
- Elimina N+1 en layaway, flotilla, dashboard y global_invoice
- Asegura folios atomicos para CFDI, ordenes de servicio y polizas
- Protege client_secret de MercadoLibre en backend
- Conecta botones/filtros de config, customers, accounting e invoicing
- Mejora accesibilidad (labels/aria-label) y estados de carga/vacio
- Limpia accounting.js obsoleto y consolida accounting.v9.js
- Actualiza cache busting a v32 y Service Worker a v32
- Documenta todo en docs/AUDIT_Y_MEJORAS_2026-06-15.md
Tests: 35 passed
- Add generate_service_order_ticket() in thermal_printer.py with ESC/POS commands for 58mm and 80mm printers.
- Add POST /pos/api/service-orders/:id/print endpoint returning raw bytes or JSON for browser rendering.
- Extend printer.js with printServiceOrder() using WebUSB/Web Serial.
- Add Imprimir orden button in workshop.js detail modal.
- Update FASES_IMPLEMENTADAS.md.