The single-waterline trace-in was invisible with sparse data (2 points draw
in one step). Replace it with a per-series waterline: each station's line now
traces left->right on first appearance, series revealed 0.18s apart in a
cascade so the draw is clearly visible. Newly-added favourites get a full
reveal immediately on reload; Reduce Motion still jump-cuts. Range/mode
morphs and numeric headline transition unchanged.
FuelBoard Contributor
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