The line between the editor head (dropdown/title area) and the editor
body only showed as the cards' own borders inside rounded corners and
read as hover-dependent and flickering. Draw an always-visible separator
that spans the full card width: border-bottom on the head card and
border-top on the editor card, with square corners on the facing edges
so the two form one continuous line. CSS only in app.css; no inline
styles or scripts, CSP unchanged.
fen
542d98e4d9