- UserProfile decodes directory_hidden; updateProfile() sends it; Settings has
a "hide my profile" toggle (excludes you from share/group pickers).
- GroupMember decodes shares_calendar; the group filter list now only shows
members who actually share a calendar (no phantom empty rows).
- Robust custom decoders (decodeIfPresent) for the new fields.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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