- POST /documents/:id/convert-and-send: guards before any write (proforma-only,
Gmail alive, recipient resolved), ONE txn convert+issue, email strictly after
commit — failed send never rolls back the issued invoice (warning instead)
- supersedeProforma: cancel (number stays consumed) + fresh linked PROFORMA
draft carrying the payload verbatim; INVOICE hard-rejected to credit-note path
- POST /documents/:id/supersede route; DocumentView gains both buttons
- 10 tests; suite 280 green
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Thomas Joise