Quick Sale Blanket Orders

This module brings the fast product-entry experience of quick sale orders to blanket sale orders. On the blanket order form, an "Add" button is placed just above the order lines. It is only visible while the blanket order is in Draft or Sent state, so users cannot mass-add products once the order is confirmed.

Clicking Add opens a product selection screen. The list is filtered to products that are allowed on blanket order lines, and the screen is titled with the customer's commercial name so users know which blanket order they are filling. Products can be selected in bulk and added in one go.

When products are added, the module creates the corresponding blanket order lines automatically. For each product it uses the quantity to process, the product's quick unit of measure and its sales price as the line values. The unit of measure defaults to the product's main unit when the action comes from a blanket order.

A safety rule is enforced: there must be only one line per product for mass addition. If a product already appears on more than one line, an error message is shown and the addition is blocked.

The module extends the sale.blanket.order model and the product.product model, and it relies on the blanket order and quick sale modules.