The app sends the sealed facet Pokébox unchanged. Tin is no longer a client facet. The API projects former tin products as Pokébox and returns an empty set for sealed_type=Tin, which is backend #605 (5c4a4d34).

Merged into app staging in #916 as 61a657da8def54b2d33a841645ce02b6321e1149. Not deployed. Local gates only.