refactor

frontend/src/detail/PreviewZoomOverlay.jsx

@@ -1,15 +1,10 @@
 import React, { useEffect, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { ArrowLeftIcon, ArrowRightIcon } from '../ui/icons';
+import { clamp } from '../utils/math';
 
 const noop = () => {};
 
-const clamp = (value, min, max) => {
-  if (value < min) return min;
-  if (value > max) return max;
-  return value;
-};
-
 const ensureDocumentRoot = () => {
   if (typeof document === 'undefined') {
     return null;