better

src/lib/format.ts

@@ -1,9 +1,11 @@
+import { PRECISION } from './limits';
+
 export const mm = (value: number) =>
   Number.isFinite(value)
     ? new Intl.NumberFormat('en-GB', { maximumFractionDigits: 1 }).format(value)
     : '—';
 /** Round cutting marks up without letting floating-point noise add a half millimetre. */
-export const cutLength = (value: number) => Math.ceil(value * 2 - 1e-9) / 2 + 0;
+export const cutLength = (value: number) => Math.ceil(value * 2 - PRECISION.roundingNoise) / 2 + 0;
 /** An exact-fit stock edge or remnant needs no rounded-up preparation cut. */
 export const cutMm = (value: number, available = Infinity) =>
   mm(Math.min(cutLength(value), available));