feat: update order payment methods and refine profile edit functionality

- Replaced `Order.PaymentMethod` options with "cash" and "card" while adjusting related code and templates
- Set "cash" as the default payment method for orders and checkout forms
- Added profile editing functionality with `ProfileForm`, allowing users to update names
- Improved feedback messages across profile and order management templates
- Updated catalog to handle empty filter results with a "reset filters" option

templates/orders/emails/order_confirmation_email.html

@@ -1,7 +1,7 @@
 <div style="max-width:640px;margin:0 auto;background:#ffffff;border:1px solid #d6dde6;padding:32px;font-family:Arial,sans-serif;color:#36213e;">
-    <h1 style="margin:0 0 16px;font-size:28px;">Заказ №{{ order.id }} оплачен</h1>
+    <h1 style="margin:0 0 16px;font-size:28px;">Заказ №{{ order.id }} оформлен</h1>
     <p>Здравствуйте, {{ order.customer_name }}!</p>
-    <p>Ваш заказ успешно оформлен и оплачен.</p>
+    <p>Ваш заказ успешно оформлен.</p>
 
     <table style="width:100%;border-collapse:collapse;margin:24px 0;">
         <thead>
@@ -26,7 +26,7 @@
     <p><strong>Скидка:</strong> {{ order.discount_total }} руб.</p>
     <p><strong>Доставка:</strong> {{ order.delivery_total }} руб.</p>
     <p><strong>Подъём на этаж:</strong> {{ order.floor_lift_total }} руб.</p>
-    <p style="font-size:18px;"><strong>Итого к оплате:</strong> {{ order.total }} руб.</p>
+    <p style="font-size:18px;"><strong>Итого:</strong> {{ order.total }} руб.</p>
 
     <p><strong>Доставка:</strong> {{ order.get_delivery_method_display }}</p>
     {% if order.region or order.address %}