Apple rejects an App Store icon carrying an alpha channel (ITMS-90717) and it
rejects on the channel being PRESENT, not on any pixel being translucent -- so
every size in the appiconset is re-encoded to PNG colour type 2, not just the
1024. Covers the extension's set too, since it ships in the same bundle.

Every icon was verified fully opaque first, so each re-encode is pixel-
identical; nothing about the artwork changes. Connect's set still carries
alpha and will need the same treatment before its next iOS upload.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>