Add feature to display remaining available medication days

[Qcaid]

As a user,
I want to see the remaining available medication days
So that I can proactively plan medication refills and avoid interruptions in my treatment schedule.

[Futsch1]

Understood and accepted. Be aware that this will only be an estimation based on the reminder types (e.g. reminders with variable amounts or interval based reminders where the interval depends on the previous dose).

[Qcaid]

理解并接受。请注意，这只是基于提醒类型的估计（例如，具有可变数量的提醒或基于间隔的提醒，其中间隔取决于之前的剂量）。

Thank you for the explanation. I will keep the estimation nature of the reminders in mind and adjust as needed based on actual use. I deeply appreciate you developing such an excellent app — my partner, who underwent electroconvulsive therapy (ECT), has experienced significant memory loss, and this software has been vital in reminding her to take medication on time, ensuring the continuity of her treatment.