New components, convert hooks to components, bug fixes.

components/Link.js

@@ -0,0 +1,12 @@
+import React from 'react';
+import classNames from 'classnames';
+import NextLink from 'next/link';
+import styles from './Link.module.css';
+
+export default function Link({ href, className, children }) {
+  return (
+    <NextLink href={href}>
+      <a className={classNames(styles.link, className)}>{children}</a>
+    </NextLink>
+  );
+}