Prevent nav context re-renders (#4266)

beta/src/components/useMenu.tsx

@@ -51,13 +51,17 @@ export const useMenu = () => {
     };
   }, [router.pathname, hideSidebar]);
 
-  return {
+  // Avoid top-level context re-renders
+  return React.useMemo(
+    () => ({
       hideSidebar,
       showSidebar,
       toggleOpen,
       menuRef,
       isOpen,
-  };
+    }),
+    []
+  );
 };
 
 export const MenuContext = React.createContext<ReturnType<typeof useMenu>>(