Purchase Picking State

This module gives buyers a quick way to see how far the receipts linked to a purchase order have progressed, without opening each transfer.

On every purchase order, a new read-only field called "Picking status" is calculated automatically from all the related pickings. Its possible values are Cancelled, Not Received, Partially Received and Transferred. When the order has no picking at all, the field stays empty and is hidden.

The rule is simple: if all pickings are cancelled the status is Cancelled; if all are done (or a mix of done and cancelled) it is Transferred; if only some are done it is Partially Received; otherwise it is Not Received.

The field appears on the purchase order form, right after the currency, and in the purchase order list views, right after the order status. In the main list view it is available as an optional column that users can show or hide. It is never visible when empty, so draft orders without receipts stay clean.

The module only extends the purchase.order model and the existing purchase order form and list views; it does not create new menus or screens.