- The radar/spider scale no longer clutters the figure: the evenly spaced
tick values now sit in a slim legend beside the chart, both in the live
preview and in the SVG/HTML export.
- Hovering a radar point shows a tooltip (axis, series, value) like the other
charts; the invisible scale-anchor dataset is ignored.
- Refresh the documentation (README, user guide, file format, changelog) for
all recent work: code-slide theming with custom hex colours, the spider/radar
chart type, chart min/max, legend hover, and the chart tooltip behaviour.
- Drop two redundant non-null assertions in the chart preview tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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