The link screen carries the whole burden of the five-minute bar: it names
where to find the instance ID, validates the format before asking the server
so a typo is instant rather than a round trip, surfaces the backend's own
message when a UUID is already linked, and on success lands the customer
directly on the download rather than back on a list.
Billing is deliberately thin and says plainly that billing changes go
through support, rather than linking to a Paddle portal that does not exist
until spec 5.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>