fix: export Excel data in same order as on-screen sorted view

Changed from filteredRows to sortedRows to preserve current sort order in export

components/WeeklyGrid.tsx

@@ -146,8 +146,8 @@ const WeeklyGrid: React.FC<WeeklyGridProps> = ({ data }) => {
 
     // Export to Excel
     const handleExportExcel = () => {
-        // Prepare data for export
-        const exportData = filteredRows.map(row => {
+        // Prepare data for export - use sortedRows to match on-screen order
+        const exportData = sortedRows.map(row => {
             const rowData: { [key: string]: string | number } = {
                 SKU: row.sku,
                 ASIN: row.asin,