Category mapping gets a table-first editor
Mapping your catalog to a marketplace category tree now happens in one table: your values on the left, the channel's tree on the right, a product count on every row.
Category mapping used to mean working through your catalog one value at a time, with no sense of how much was left. The new editor is a table: every product type and category value in your catalog gets a row, each row shows how many products sit behind it, and the mapping target sits right beside it.
Because the table reads the same source order the renderer walks, what you see is exactly what the feed will do. Unmapped values are rows you can see, not entries in a report you forgot to open, and a count click shows the products behind any value before you decide where it belongs.
One sitting with the table replaces the old map-check-fix loop: you work top to bottom, the largest groups first, and the coverage check at the end confirms there is nothing left rather than finding the gaps.