Huella — Daycare for dogs

Huella is the digital experience of a daytime dog daycare for the owner. Register the dog (vaccines + size + temperament), see which packs have room today, pick group + drop-off and pickup windows, hold 15 minutes with server-side expiresAt and confirm with a real QR pass whose URL opens /pase/:code. Staff scan the code at the threshold (confirmed → checked_in); at pickup only that pass releases the dog (checked_in → picked_up). In My visits you can review history, cancel with a 24 h policy and earn yard points derived from picked_up visits (10 pts each). The truth layer is the health file + capacity N per pack + pickup-authorization QR: the 9th small dog of the day is 409 GROUP_FULL, a dog without vaccines cannot book, and picking up with another owner's QR is 409 PICKUP_DENIED.