injectChartContext

Description#

Inject the parent chart's reactive context. Throws a clear dev-mode error when the consumer is not mounted as a content child of <cngx-chart>. The consumerName argument is interpolated into the error message so the consumer-class name surfaces at the call site rather than a generic guard string.

Use it from custom layer directives mounted on <svg:g> hosts to read plot, the scales and renderSvg the same way the built-in layer atoms do.