The browser's accordion already focuses the Context trend chart on the
open category; the composition bar now holds the same highlight as a
resting state — category mode lights the category's segment, DNA mode
lights the category's bands as a group (the parts' group key). A
pointer hover overrides the pin and the pin resumes on leave; the pin
drops while a previewed/picked step holds nothing for the category, so
the bar never reads all-dimmed with nothing lit. No tooltip floats for
the pin: category mode mounts no tip slot, and the group-keyed pin
exact-matches no DNA band.
Bowen Liang
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