Two fixes for studio owners and their customers.
- LINE bot menu preview: the Preview button now shows the image for the menu size you have currently selected, updating as soon as you change the size or upload a new image, instead of an older combined image.
- Preview button state: the button is available as soon as there is an image to show, and it only displays a loading indicator while the preview is actually opening.
- Guest bookings: guests now follow the same payment rules as signed-in customers, so a class that can only be booked with a pass is no longer offered as a pay-now class and no longer preselects Pay.
