The Prompt library shelf uses the shared concept toolbar (search, category,
sort, Filters): sorts are Recently added / Name A-Z / Highest rated, then
Oldest first; the Tags filter moves to "Refine this view" (D14) and Refresh
library is removed (D15), with Retry kept and re-reading failed categories.
The caption is the concept's .section-caption, "N positive prompts · M
negative variants" over the filtered set from variant_total.
Library-embedded media cards keep the favorite star working: the Library
gallery read already reports favorite (one batched lookup per page, now
covered by a test), and star answers are delivered to every mounted embedded
gallery, so a star toggles, repaints and survives a reload. The checkbox and
selection bar stay Images-only.