Sends client_ref (the till's localId) so the offline queue can retry a
sale that already landed without recording it twice. Customer search
moves to /api/v1/pos/customers and now carries the company name for the
delivery-note slip.
Co-Authored-By: Claude <noreply@anthropic.com>
pb-config.js deliberately not copied — it hardcoded a PocketBase
superuser email/password in client-shipped JS.
Co-Authored-By: Claude <noreply@anthropic.com>