Reads the ERP-exported "Distinta Base" file (SpreadsheetML XML or real binary .xls/.xlsx via ExcelDataReader), extracts Componente/Descrizione, writes a CSV and previews it in a new tab alongside the existing CAD search. Also ignore the exported Excel/CSV files dropped in the repo root. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>