refactor

frontend/src/hooks/useClickOutside.js

@@ -0,0 +1,20 @@
+import { useEffect } from 'react';
+
+export function useClickOutside(ref, handler) {
+  useEffect(() => {
+    const listener = (event) => {
+      if (!ref.current || ref.current.contains(event.target)) {
+        return;
+      }
+      handler(event);
+    };
+
+    document.addEventListener('mousedown', listener);
+    document.addEventListener('touchstart', listener);
+
+    return () => {
+      document.removeEventListener('mousedown', listener);
+      document.removeEventListener('touchstart', listener);
+    };
+  }, [ref, handler]);
+}