feat(website): add Nuxt 4 marketing landing page

New standalone apps/website (Nuxt 4) serving the public marketing site at
dezky.local / www.dezky.local. The customer portal moves off the root domain
to app.dezky.local only.

Landing page ported from the Dezky design handoff: light theme, Danish
default, hero variant A, with a working da/en toggle. Self-contained colour
system threaded through components (utils/landingTokens.ts), full bilingual
copy (utils/landingCopy.ts), and shared state (composables/useLanding.ts).
Sections live under components/landing/* with the Node logo under
components/brand/*.

Wired into docker-compose (website service, volume, Traefik labels, network
aliases) and bootstrap.sh (hosts list + service URLs).

apps/website/components/landing/HowItWorks.vue

@@ -0,0 +1,31 @@
+<script setup lang="ts">
+// Section 03 — setup. Three numbered steps on a top rule with node markers.
+// Ported from landing-sections.jsx HowItWorks.
+import { useTheme, useCopy } from '~/composables/useLanding'
+const t = useTheme()
+const copy = useCopy()
+</script>
+
+<template>
+  <section :style="{ background: t.bg, color: t.fg }">
+    <LandingContainer pad="120px 64px">
+      <LandingSectionLabel :label="copy.how.label" />
+      <h2 :style="{ fontFamily: '\'Inter Tight\', sans-serif', fontWeight: 600, fontSize: 'clamp(36px, 4.4vw, 64px)', letterSpacing: '-0.032em', lineHeight: 1.0, margin: 0, textWrap: 'balance', color: t.fg }">{{ copy.how.heading }}</h2>
+      <div :style="{ marginTop: '80px', display: 'grid', gridTemplateColumns: 'repeat(3, 1fr)', gap: '0', position: 'relative' }">
+        <div
+          v-for="(step, i) in copy.how.steps" :key="i"
+          :style="{ padding: '40px 36px 0 0', borderTop: `1px solid ${t.borderStrong}`, position: 'relative' }"
+        >
+          <div :style="{
+            position: 'absolute', top: '-7px', left: '0', width: '14px', height: '14px',
+            background: i === 0 ? t.signal : t.bg,
+            border: `1px solid ${t.borderStrong}`, borderRadius: '999px',
+          }" />
+          <div :style="{ fontFamily: '\'JetBrains Mono\', monospace', fontSize: '12px', color: t.fgDim, letterSpacing: '0.08em' }">step {{ step.n }}</div>
+          <h3 :style="{ fontFamily: '\'Inter Tight\', sans-serif', fontWeight: 600, fontSize: '28px', letterSpacing: '-0.025em', lineHeight: 1.1, margin: '20px 0 16px 0', color: t.fg }">{{ step.title }}</h3>
+          <p :style="{ fontFamily: '\'Inter\', sans-serif', fontSize: '15px', lineHeight: 1.6, maxWidth: '300px', color: t.fgMuted, margin: 0, textWrap: 'pretty' }">{{ step.body }}</p>
+        </div>
+      </div>
+    </LandingContainer>
+  </section>
+</template>