Loyalty Card Fixed Expiration Date

This module adds a simple setting to loyalty programs of the gift card type. On the loyalty program form, next to the portal point name field, a new "Duration in days" field appears, but only when the program type is a gift card; for other program types it stays hidden.

When a loyalty card is created for a program that has a duration in days greater than zero, the system automatically fills in its expiration date as today's date plus that number of days. If the card is created with an expiration date already provided, that date is kept and nothing is overwritten.

• Adds a duration in days setting on gift card programs.
• Automatically computes the expiration date of new loyalty cards from that duration.
• Leaves manually supplied expiration dates untouched.
• If no duration is set (zero or empty), no expiration date is calculated.

The module extends the existing loyalty card and loyalty program models and only changes the loyalty program form view. It does not add new menus, reports, emails or scheduled jobs, and it does not change how points are earned or spent.