Always been a bit annoyed to have even the item name load in so weird and slow 😅 this fixes it to come in much faster! This also allows us to SSR the item name in the page title, since we've put it in the GraphQL cache at SSR time!
One little tricky thing here was moving the `[itemId].tsx` page into the folder as `index.tsx`! Because we didn't have subpages before but now we do!
