ADR 0044, D29 to D32: Share opens one sheet, people first, then the
community; a Viewer's studyset screen is read-only; a shared studyset
is marked with people; safety codes are compared from a member's row,
members matched to their keys by handle.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>