Ullrich Schäfer
c38e054088
feat(planner): restyle elevation chart canvas on tokens
Bring the chart's chrome onto the design system (spec task 5.1):
- Plain mode: sage accent line + soft accent→transparent gradient fill
(was off-palette blue).
- Hover: calm near-black crosshair + accent dot with a light ring, mono
label (was red).
- Axis + day-divider labels: token colors, Geist Mono; dividers use the
border-md token.
- Drag-select: accent tint (was blue).
Per-mode data-viz palettes (grade, surface, …) are unchanged. Darwin
visual-regression baselines regenerated; linux baselines to follow via
the update-snapshots workflow.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>