fix: update WhatsApp order number to +46 73 938 10 89

- Changed the order WhatsApp from 46709864995 to 46739381089 in CartDrawer.tsx (the wa.me link used for cart orders).
- Updated matching comments in CartDrawer.tsx, CartContext.tsx, and app/layout.tsx.
- This is the number for WhatsApp orders (matches the mobile phone 0739-381089 used for reservations/bookings).
- Phone display numbers (landline + mobile) left unchanged as they were not part of the request.

components/CartContext.tsx

@@ -27,7 +27,7 @@
  * 
  * WHATSAPP ORDER FLOW (the "checkout" for this restaurant):
  *   The cart never talks to a real payment gateway. Instead, the drawer builds a
- *   beautifully formatted message and opens https://wa.me/46709864995 with it pre-filled.
+ *   beautifully formatted message and opens https://wa.me/46739381089 with it pre-filled.
  *   This matches exactly how the reservation form on the homepage works.
  * 
  * FUTURE IMPROVEMENTS (documented for next developer):

components/CartDrawer.tsx

@@ -18,7 +18,7 @@
  *   Instead of a traditional Stripe checkout, we generate a pre-filled WhatsApp
  *   message containing every line item + quantities + grand total.
  *   This matches the restaurant's current real-world ordering process.
- *   The number 46709864995 is the same one used in the homepage reservation form.
+ *   The number 46739381089 is the same one used in the homepage reservation form.
  * 
  * FUTURE ENHANCEMENTS (documented here so nothing is forgotten):
  * - Add "Special requests" textarea per order
@@ -71,7 +71,7 @@ Thank you!`;
 
     const encoded = encodeURIComponent(message);
     // This is the same WhatsApp business number used for table reservations on the homepage
-    window.open(`https://wa.me/46709864995?text=${encoded}`, '_blank');
+    window.open(`https://wa.me/46739381089?text=${encoded}`, '_blank');
   };
 
   // Guard clause — drawer only renders when explicitly opened via context