Allow accounts to record partial/advance payments against a PO before
full delivery. A new PARTIALLY_PAID status tracks in-progress payment;
paidAmount accumulates across multiple markPaid calls. PO only closes
when both paidAmount >= totalAmount AND all line items are delivered.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
PO_SUBMITTED: managers only, submitter no longer copied
PAYMENT_SENT: submitter only (it is a receipt prompt, not a manager action)
PARTIAL_RECEIPT_CONFIRMED: managers now notified via new event type
RECEIPT_CONFIRMED: unchanged (managers + accounts)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
PARTIALLY_CLOSED was missing from the open-filter so affected POs
disappeared from the submitter''s My Orders view entirely, making it
impossible to confirm remaining deliveries.
Also hardens confirmReceipt() against negative delivery quantities
and extends partial-receipt.spec.ts with US-8c/8d/8e covering the
full PARTIALLY_CLOSED revisit flow.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
