The full-shape fix wasn't the actual bug — confirmed live that
shares.info returns HTTP 200 with a completely empty body (not a 404,
not {data: null}) when no share exists yet for a document. post(_:)
assumed any 2xx had a non-empty envelope to decode, so this hit
JSONDecoder with zero bytes and threw "not valid JSON" on every first
share-sheet open.
Added postOptional(_:body:), mirroring post/postForSuccess, that
treats an empty body the same as a 404: nil, not a decode failure.
shareInfo calls it directly instead of wrapping post() with a
notFound-only catch.
Puranjay Savar Mattas
1476c6c6ba