How does the wizard bulk-import a catalogue from xlsx/csv?

The Upload and Import steps handle catalogue bulk-loading. You pick an .xlsx or .csv file; the importer parses it and shows a live preview (row count, top categories, category-tree depth, column mapping, detected image column). On confirmation, the import runs as a background job (so large files don't block the UI) with a progress bar moving through three phases — Categories, then…

The Upload and Import steps handle catalogue bulk-loading. You pick an .xlsx or .csv file; the importer parses it and shows a live preview (row count, top categories, category-tree depth, column mapping, detected image column). On confirmation, the import runs as a background job (so large files don't block the UI) with a progress bar moving through three phases — Categories, then Products, then Stock. xlsx is read with ClosedXML; csv with a built-in quoted-field parser. Column mapping is flexible (case-insensitive header synonyms), so files from different sources work without reformatting. After import, a "Fetch images" button appears to pull in product images from a URL column.