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/content.tsx

@@ -1,4 +1,4 @@
-"use client"
+"use client"
 
 import { useState, useEffect } from "react"
 import OrderStats from "./order-stats"
@@ -75,7 +75,7 @@ export default function Content({ username, orderStats }: ContentProps) {
           {greeting}, {username}!
         </h1>
         <p className="text-muted-foreground mt-1 italic text-sm">
-          "{randomQuote.text}" — <span className="font-medium">{randomQuote.author}</span>
+          "{randomQuote.text}" ÔÇö <span className="font-medium">{randomQuote.author}</span>
         </p>
       </div>