Now that all member-area pages have migrated to PageShell +
ColumnsLayout, SidebarLayout has no consumers and can be deleted.
PageShell owns the flex chain, so the .dashboard-body wrapper on
member/dashboard.vue (flex: 1; display: flex; flex-direction: column;
min-height: 0) is redundant. Update stale SidebarLayout comments on
members/[id].vue to reference ColumnsLayout.
Update member directory and public profile APIs to include craftTags
and communityConnections with privacy-aware filtering. Directory now
uses predefined tags from the Tag model for filter bars and supports
craftTag/connectionTag query filters. Frontend shows craft tag pills
and cooperative topics with state labels, falling back to old
offering/lookingFor fields. Add Connections nav item.
