- makeIndicators now uses each spoke's own value * 1.1 as its max
  instead of the global max, preventing small-value spokes from
  becoming invisible
- Tooltip formatter now pairs each value with its indicator name
  (ind.name: value) using params.indicator, falling back to plain
  values when indicators are unavailable

…artSettings

- Add radar renderer to RENDERERS map and bypass 3D routing in ChartCard
- Import and instantiate useRadarChartOptions; add radar case to switch in useChartOptions
- Import Radar icon from lucide-vue-next; add radar entry to CHART_ICONS in ChartSettings

Register "radar" in validChartTypes, notAllowedForLimitedCharts (scale
and rotate not permitted), flag validation rules, --charts default and
description, template defaultCharts, and ParseChartSpecs error message.
Add three TestParseChartSpecs cases: sort=asc (valid), scale=log and
rotate (both invalid).

- Register ChartRadar in vite.config.ts CHART_ROOT_PREFIX so the Go pruner gates it as a first-class chart root
- Fix TS2322 in useRadarChartOptions.ts: apply ?? '#5470C6' fallback where getNextColorFor (string | undefined) is assigned to RadarDataItem.itemStyle.color (string)
- Rebuild UI; VizbChartRoots["radar"] = "vizb:ChartRadar-V1FgPFrh" now present in pkg/template/vizb-ui.gen.go
- Add radarRoot variable + require.NotEmpty assertion and "radar keeps radar" pruning sub-test in chunks_test.go

…and-aid fallbacks

…rious index from radar config

…attern

Replace pie-mirror implementation with a single radar chart where:
- Y-axis values become indicator spokes
- X-axis values become legend series (one polygon each)
- Z-axis (if present) becomes legend series with X values as multiple
  data points per Z series, matching the AQI city-per-series pattern

Legend items are now axis labels (X/Y/Z), selectedMode=single so only one
is active at a time. Clicking switches which axis values become the spokes,
rendering one polygon per view — matching how pie chart uses per-dimension
titles instead of per-value legend entries.

…e pattern"

This reverts commit b73e597.

…rable

Large polygons drawn first (behind); small ones drawn last (on top).
Add symbol=circle/symbolSize=4 so each spoke vertex is independently
hoverable even when occluded by a larger polygon's fill area.
Legend order preserved separately via named matching.