Function parsePercent

src/interaction/findNearestPoint.ts:44–49

(value: string)

const clamp01 = (v: number): number => Math.min(1, Math.max(0, v));

const parsePercent = (value: string): number | null => {
  const m = value.trim().match(/^(\d+(?:\.\d+)?)%$/);
  if (!m) return null;
  const p = Number(m[1]) / 100;
  return Number.isFinite(p) ? p : null;
};

const normalizeStackId = (stack: unknown): string => {
  if (typeof stack !== 'string') return '';