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- 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>