Activate the Finbite e-invoicing API

Finbite connects Flowbyte for sending and receiving e-invoices (including Peppol).

1. In Finbite: enable **ERP interface** and copy the auth code (`COMPANY_ID:TOKEN`).
2. In Flowbyte: **Settings → Company → E-invoicing** (or API interfaces).
3. Paste auth code → enable e-invoicing → choose test/production → **Test connection**.
4. Send sales invoices with **Send e-invoice**; receive under **Incoming purchase invoices**.

### Support

* Finbite: https://app.finbite.eu
* Flowbyte: support@flowbyte.ee