- Menu: old Suppliers leaf hidden (route kept), Suppliers 2 renamed Suppliers
- PO invoice status: new 'over' state (never closed), live over-PO warning when typing
- Admin correction of invoice amount/date/number with mandatory reason, logged to purchase_invoice_edits
- Payable now carries unpaid balance forward month to month
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
