Restrict Promo Codes to Specific Days of the Week

Currently, promo codes for Direct bookings cannot be restricted to specific days of the week. This makes it difficult for hosts to run mid-week promotions (e.g., Monday–Thursday) without the risk of guests applying the discount to higher-demand weekend dates.

The requested feature is the ability to select which days of the week a promo code is valid for, ensuring discounts are only applied to the intended dates.