refactor(chart): enforce 400-line source limit

src/components/waveformLegendGeometry.test.ts

@@ -0,0 +1,21 @@
+import { describe, expect, it } from 'vitest'
+import {
+  waveformLegendErrorBarPath,
+  waveformLegendLinePath,
+  waveformLineDasharray,
+} from './rendering/seriesStyle'
+describe('legend series geometry', () => {
+  it('keeps line samples centered and clamps error-bar caps to the swatch', () => {
+    expect(waveformLegendLinePath('linear')).toBe('M1 8H25')
+    expect(waveformLegendLinePath('step-start')).toBe('M1 8H25')
+    expect(waveformLegendLinePath('step-middle')).toBe('M1 8H25')
+    expect(waveformLegendLinePath('step-end')).toBe('M1 8H25')
+    expect(waveformLegendLinePath('step-after')).toBe('M1 8H25')
+    expect(waveformLegendLinePath('none')).toBeNull()
+    expect(waveformLegendErrorBarPath(10)).toBe('M8 2H18M13 2V14M8 14H18')
+    expect(waveformLegendErrorBarPath(100)).toBe('M1 2H25M13 2V14M1 14H25')
+    expect(waveformLineDasharray('solid')).toBeUndefined()
+    expect(waveformLineDasharray('dashed')).toBe('8 5')
+    expect(waveformLineDasharray('dash-dot')).toBe('8 5 1.5 5')
+  })
+})