Fix Booking Website Bugs

I run a small dog grooming business and I built its booking website myself (React frontend, Node/Express API, Postgres). I also have a day job, and the bug list keeps growing faster than I can fix it. Right now there are about a dozen open issues on GitHub. The annoying ones: some customers see their appointment on the wrong day, the password reset link sometimes says invalid, the mobile checkout is awkward, and the list pages behave strangely when there are many bookings. The rest are smaller.

I'd like someone to work through the bugs over about a week, starting with whatever hurts customers most.