feat(website): footer sub-pages + shared page layout

Wire every footer link to a real route. Adds a shared `page` layout (Nav +
content + Footer), reusable PageHeader/ComingSoon components, six content pages
(about, contact, brand, roadmap, changelog, migration), and a dynamic [slug]
catch-all for the not-yet-built pages — unknown slugs 404, legal slugs get a
distinct "contact us" body.

Footer links repointed from dead "#" to real paths; section anchors ("/#suite")
smooth-scroll on the homepage and route home + scroll from a sub-page; logo
links home. Page copy (da + en) added under COPY.pages.

apps/website/pages/index.vue

@@ -3,14 +3,23 @@
 // (Landing Page.html → landing-app.jsx + landing-sections.jsx). Light theme,
 // Danish default, hero variant A — the production defaults the user landed on.
 // Section order matches the design exactly.
-import { useTheme, useCopy, useLang } from '~/composables/useLanding'
+import { onMounted, nextTick } from 'vue'
+import { useRoute } from 'vue-router'
+import { useTheme, useCopy, useLang, scrollToAnchor } from '~/composables/useLanding'
 
 const t = useTheme()
 const copy = useCopy()
 const lang = useLang()
+const route = useRoute()
 
 const description = computed(() => copy.value.hero.sub)
 
+// Arriving via a section link from a sub-page (e.g. "/#suite") lands here with
+// a hash — scroll to it once the page has painted.
+onMounted(() => {
+  if (route.hash) nextTick(() => setTimeout(() => scrollToAnchor(route.hash), 60))
+})
+
 useHead({
   title: 'dezky · suveræn produktivitet',
   htmlAttrs: { lang },