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/ui/badge.tsx

@@ -1,4 +1,4 @@
-import * as React from "react";
+import * as React from "react";
 import { cva, type VariantProps } from "class-variance-authority";
 
 import { cn } from "@/lib/utils/styles";
@@ -35,4 +35,4 @@ function Badge({ className, variant, ...props }: BadgeProps) {
   );
 }
 
-export { Badge, badgeVariants };
+export { Badge, badgeVariants };