Hovering a category in the Context browser (or the overview legend/bar)
now lights that category across the trend card: the matching segment in
EVERY chart bar (total and delta modes), the detail panel's composition
bar, and its per-category rows.
The chart highlight rides a plain container attribute (`data-catdim`) +
static per-segment `data-cat` keys, so the dim/brighten pairing is pure
CSS and the memoized bars never re-render on a cross-card hover. The
detail bar mirrors the key one-way with its tooltip off (a cross-card
hover must not float a second tip), and the detail rows reuse the
legend-chip idiom: tinted background, bold label, ring on the color dot.
The overview's 'free' key stays filtered, as in the browser's live link.
bowenliang123
86333a80d5