fix build crash

TODO.md

@@ -7,3 +7,4 @@
 - [x] gallery sort and filter preserved in url (use-query or whatever?)
 - [x] nav next/prev buttons use saved gallery sort and filter
 - [ ] bug: "gallery" buttin in nav should reset filter and sort selections
+- [ ] bug: styling on action buttons in prerender/isClient==false

src/components/GalleryImage/GalleryImage.js

@@ -39,9 +39,10 @@ const logKeyShortcut = (keyCode) => {
 const GalleryImage = ({
   data,
   location: {
-    state: { sortedImageList, currentIndex, filterKeyword, sortKey },
+    state
   },
 }) => {
+  const { sortedImageList, currentIndex, filterKeyword, sortKey } = state ?? {};
   const image = data.file;
   const ar = getAspectRatio(image);