- Reloads (range/fuel switch, Price<->vs-cheapest) now glide the existing
lines + y-axis to the new data via withAnimation/.animation(value: mode)
instead of snapping.
- One-time left->right trace-in on first data appearance by revealing an
increasing prefix of each series' points (area + line stay in sync); later
switches morph rather than re-trace.
- Headline average rolls its digits with .contentTransition(.numericText).
- All animation honours .accessibilityReduceMotion (jump-cut to final state).
Kept two-pass area/line ordering, explicit series:, bounded fill bands, and
tight chartYScale unchanged.
FuelBoard Contributor
69c3c17606