apps/entities: add 'edit in all facets' link on per-facet detail
Per-facet entity detail view (#entity-detail-view) now shows
'edit {entity_name} in all facets →' next to the back-link. Clicking it
calls window.selectFacet(null); the existing facet.switch chain lands
the same entity in the all-facets detail view.
Layout uses CPO Option (a): a .entity-detail-link-row wrapper around the
back-link and the new link. Wrapper-div (not parent-flex) avoids
distributing the header's other children (title, aka, indicators).
Source: req_zcuvy72r (VPE) / CPO design-entity-edit-in-all-facets.md
(Option A, founder UX walk-through 2026-04-26).