InvoiceOrder/CorrectionInvoiceOrder gain an optional order-level
kleinunternehmer flag, snapshotted per order (same pattern as vatExempt)
so a later toggle of the tenant's setting never rewrites an
already-issued invoice. Takes precedence over vatExempt.
- Visual PDF: "enthält X% MwSt." becomes the §19 UStG notice.
- E-invoice XML: new UNTDID 5305 category "E" with a free-text exemption
reason (no VATEX code — §19 UStG has none, BR-E-10 allows text alone).
- New Mustang CI fixture + buildEInvoiceData unit test for the "E" path.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Adds a Gitea Actions workflow that generates realistic e-invoice fixtures (multi-VAT-rate original invoice, Storno, Gutschrift) and validates them against the reference Mustang validator on every push, catching a broken EN16931 mapping before it reaches production instead of relying on manual spot-checks.
renderInvoiceEInvoice()/renderCorrectionInvoiceEInvoice() produce a
Factur-X-EN16931 hybrid PDF/A-3 (existing @react-pdf/renderer PDF +
embedded EN16931 XML) via @e-invoice-eu/core, instead of a plain PDF.
The plain renderInvoicePdf()/renderCorrectionInvoicePdf() stay unchanged
and are still what Live Preview uses — this only adds a post-processing
step for the actual send/download paths.
buildEInvoiceData()/buildCorrectionEInvoiceData() map InvoiceOrder/
CorrectionInvoiceOrder + InvoiceSeller into the library's raw UBL-shaped
Invoice object, reusing computeTaxBreakdown() for the tax math — one
implementation feeding both the human-readable and machine-readable side
of the same document. Verified end-to-end: rendered a sample invoice and
correction invoice, inflated the embedded XML stream out of the resulting
PDF/A-3 by hand (the library has no attachment-reading API to check
against), confirmed correct CrossIndustryInvoice XML, EN16931 guideline
reference, per-rate tax breakdown matching the order totals exactly, and
payment means with the IBAN from Phase 2 — not just "it didn't throw."
Found only through actually running it (not documented anywhere): every
EN16931 amount field requires a sibling `*@currencyID` key via the
library's runtime ajv validation, invisible in its TypeScript types.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
InvoiceSeller.bankDetails becomes iban/bic (EN16931 wants discrete
PaymentMeans data, not a paragraph a human formatted by hand). The
footer's bank-details line also drops the misleading "(für Überweisung)"
qualifier — it was never actually conditional on the order's payment
method (only on whether the field was set at all), just worded as if it
were. Now shown whenever iban or bic is set, regardless of payment
method.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Consolidates code previously hand-duplicated between the einfach-produktiv
frontend and payload backend repos into one canonical implementation,
consumed as a git dependency by both instead of being kept in sync by eye.
While merging the two correction-invoice copies, found and fixed three
real drifts between them:
- variantName was silently dropped in the backend's emailed Stornorechnung/
Gutschrift, but present in the frontend's re-download copy
- the backend's correction-invoice footer wasn't position:fixed, unlike
the original invoice and the frontend's copy
- the backend used a numeric date format (03.07.2025) while the original
invoice and the frontend's copy both used a spelled-out month (03. Juli
2025) — a re-download didn't visually match what was emailed
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Marco