The admin names a list page, its heading and breadcrumb after the first
side-menu item of its controller. The new_post item pointed at the posts
list too, came first and won. A side item cannot open the create form, so
drop it; the list toolbar's Create button stays.
Register the remaining YAML admin screens and the settings singleton
so a host can boot Posts, Categories, Tags, and Code journal. Posts
update and delete refuse other authors without access_other_posts.
Co-authored-by: Cursor <cursoragent@cursor.com>
YAML-driven Posts screen stores translatable markdown and regenerates
content_html in the plugin. Publish writes without access_publish are
refused; list and form queries stay on the principal without
access_other_posts.
Co-authored-by: Cursor <cursoragent@cursor.com>
