0.54.0

A signed-in visitor who opens a handbook they may not read now gets an explanation and the status 403 instead of a bare 404, with a new setting to point that at your own page. Fixes an import path that let a contributor publish, closes the oEmbed channel for internal pages, keys the area-card cache per viewer, and stops cross-handbook links from borrowing the target page title. Requires WordPress 6.8 or newer.