e9f8328404
- Updated CsvExportHelper to support Excel XML format for exporting data, improving compatibility with Excel. - Refactored export logic in DiscountOrdersMainPage, SalesReports, OrderSalesReports, and UserOrderMainPage to utilize the new Excel export method. - Changed file extensions from .csv to .xls for better clarity in exported files. - Improved header and row data handling for consistency in exported reports.