Spec (docs/reviewed/document-lifecycle.md):
- C1: Correct GlManager::delete() description — reversal entry, not hard delete
- C3: Clarify PO status 2/3 are derived (receipt_status), never stored
- C4: Add invoice status=2 (Paid/Settled) to status table
- C5: Add full Receipt/Payment Billing Note lifecycle section
- C6: Add Quotation status table and transition rules
- C7: Document soft-delete tombstone mechanism (company_id negation)
Code (InvoiceManager.php):
- C2: voidInvoice() now blocks on active credit notes, posted receipt
billing notes, and posted payment billing notes in addition to the
existing receipt/payment checks
- M9: softDelete() skips assertPostingWindow for draft invoices (status=0)
since drafts have no GL entry and no accounting impact
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
