Improved
Searching by SKU works. Typing a product's known SKU used to return nothing — only names were searched. The search now covers the SKU too, and shows it quietly in the result row.
A new line item starts right in the search. After "Add line item", the cursor jumps into the new field and the product picker opens on its own. No extra click needed to discover that you can search products here. The placeholder now says so as well.
Filters filter the line items. Category, supplier and tag at the top of a document only narrowed the product search inside the picker — line items you had already added stayed untouched, so the list looked unfiltered. All three now filter the line-item list itself, just like the search field does. Switching filters no longer flashes an empty list, and newly added items show up immediately.
Price in the product search. Result rows now show the net price prominently — you see it while picking, instead of only after adding.
The description toggle is visible. The small toggle for description and internal note got lost in the row. It now has a visible border, an explanatory tooltip, and a dot marks collapsed rows that actually contain something.