hovercard_controller.js rewritten with 200ms debounce, delayed hide (200ms), viewport-aware positioning (above/below), card stay-alive on mouse-enter. New article_link_hovercard_controller.js delegation controller for containers holding plain <a href="/articles/:id"> links (primary use: moments). hovercard.html.erb rewritten with tavern design: portrait thumb, name/kind badge, plain-text body excerpt (600 chars), “Open article” link. _article.html.erb ActionText attachment partial cleaned up (tavern-gold link, removed unused card-id-value). articles#hovercard now calls authorize @article, :show?; skips auth for public articles. _moment.html.erb outer div wired with data-controller="article-link-hovercard". 3 new controller tests; full suite 477 green.
BL-066
Shipped