- Navigation: new per-user setting (default "side") renders the page links as a
left sidebar while keeping theme/bell/avatar/logout in the top-right; falls
back to a top bar under 760px or when set to "top". Profile selector added.
- Group conversations: record a creatorId; the creator gets a "Manage members"
button to add/remove participants (new GET/POST/DELETE members endpoints,
creator-only). Existing groups backfilled.
- Customer ticketing: admin can map each assigned consultant to their username
in that customer's ticketing system. Per-customer mapping takes precedence
over the consultant's global ticketingIdentities during sync.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>