fix pdf building

src/routes/(web)/+layout.svelte

@@ -0,0 +1,13 @@
+<script>
+  let { children } = $props();
+  import '../../app.css';
+</script>
+
+<div
+  class="font-mono bg-background text-foreground dark:bg-background-dark dark:text-shadow-foreground-dark"
+>
+  <a href="#main-content" class="sr-only focus:not-sr-only focus:absolute">
+    Skip to main content
+  </a>
+  {@render children()}
+</div>