Function addAxisLabelsToOverlay

src/utils/axisLabelStyling.ts:49–81

(
  overlay: TextOverlay,
  xLabels: readonly AxisLabel[],
  yLabels: readonly AxisLabel[],
  theme: AxisLabelThemeConfig
)

 * Adds axis labels to a text overlay with consistent styling.
 */
export function addAxisLabelsToOverlay(
  overlay: TextOverlay,
  xLabels: readonly AxisLabel[],
  yLabels: readonly AxisLabel[],
  theme: AxisLabelThemeConfig
): void {
  // Clear existing labels
  overlay.clear();

  const axisNameFontSize = getAxisTitleFontSize(theme.fontSize);

  // Add X-axis labels
  for (const label of xLabels) {
    const span = overlay.addLabel(label.text, label.x, label.y, {
      fontSize: label.isTitle ? axisNameFontSize : theme.fontSize,
      color: theme.textColor,
      anchor: label.anchor ?? 'middle',
      rotation: label.rotation,
    });
    styleAxisLabelSpan(span, label, theme);
  }

  // Add Y-axis labels
  for (const label of yLabels) {
    const span = overlay.addLabel(label.text, label.x, label.y, {
      fontSize: label.isTitle ? axisNameFontSize : theme.fontSize,
      color: theme.textColor,
      anchor: label.anchor ?? 'end',
      rotation: label.rotation,
    });
    styleAxisLabelSpan(span, label, theme);
  }
}