Rationalise navigation

src/routes/pis/+page.svelte

@@ -1,13 +1,12 @@
 <script>
-    import Menu from '../../components/header.svelte'
-    import Footer from '../../components/footer.svelte'
+    import Header from '$lib/header.svelte'
+    import Nav from '$lib/nav.svelte'
     
     const title = "PIS"
-    const page = "more"
  </script>
  
- <Menu {title} />
+ <Header {title} />
  
  <p></p>
  
- <Footer {page} />
+ <Nav />