#1 Extend now actually extends. useSasquatchPro collected receipts and took the
max of (receipt.created_at + tierDays), so buying again before expiry
under-delivered. It now stacks every valid proof with renewal semantics
(expiry = max(expiry, proofTime) + days), client and server alike.
#2 Owner-grant fallback. Pro can now also be granted by an owner-authored NIP-32
kind-1985 label (org.skatespots.pro, p = user, expiry) — so Pro is not solely
dependent on the Lightning provider publishing zap receipts. New owner-only
GrantProCard (Settings -> Advanced) publishes it to getWriteRelays(); the hook
reads via querySkateContent.
Protocol: the x-sasquatch-pro payload is now {receipts,grants}; BOTH ai-proxy and
the Netlify function accept the new payload and a bare receipt (old APKs). Proxy
was deployed first and verified healthy before this commit.