Release v0.4.0 - feat(notifications): real-time per-user notifications with WebSocket-pushed bell dropdown - feat(layout): page_title_icon block, reusable rail partial for sectioned pages - feat(forms): ColorSelect widget + ColorField support - feat(css): central styling for sectioned-page action buttons - refactor(admin): consistent header icon + central btn sizing across tenant admin lists - refactor(tenants): tenant-as-FK-on-User + auto-home-membership on user create - fix(rail): non-clickable group headings, ps-4 indent on children - fix(deps): declare requests as runtime dependency