message: add active link styles.
diff: <script>
  + import { page } from "$app/stores";
  +
  export let href;
  </script>
  }
  }
  + .active {
  + color: var(--black);
  + }
  +
  a:hover,
  a:focus {
  color: var(--black);
  }
  </style>
  -<a {href} on:click sveltekit:prefetch><slot /></a>
  +<a
  + class:active={href.indexOf($page.path) >= 0}
  + {href}
  + on:click
  + sveltekit:prefetch><slot /></a
  +>
  