Debug and Verify Charts

Run trigger → inspect → decide → build → verify at the narrowest layer that owns the failure. Do not change rendering before proving prepared rows, channels, scales, and scene geometry are correct.

Semantic and Scene Checks

Check: deterministic scene invariants

Expected:

import {
  createChartScene,
  defineChart,
  lineY,
  renderChartSvg,
} from '@tanstack/charts'
import { scaleLinear } from '@tanstack/charts/scales/linear'
import { scalePoint } from '@tanstack/charts/scales/point'