Add CSV export for orders and update UI symbols

Introduces an exportOrdersToCSV function in lib/api-client.ts to allow exporting orders by status as a CSV file. Updates various UI components to use the '•' (bullet) symbol instead of '·' (middle dot) and replaces some emoji/unicode characters for improved consistency and compatibility. Also normalizes the 'use client' directive to include a BOM in many files.

components/dashboard/promotions/PromotionsPageSkeleton.tsx

@@ -1,4 +1,4 @@
-import {
+import {
   Table,
   TableBody,
   TableCell,
@@ -59,4 +59,4 @@ export default function PromotionsPageSkeleton() {
       </Card>
     </div>
   );
-} 
+}