feat(marketing): add value sections + trim FAQ

Page is now Hero → Hierarchy → Scale → Why → Use cases → FAQ → CTA → footer.

- Scale: per-tenant runtime / scale-to-zero / delegation hierarchy.
- WhyGoverned: humans-in-the-loop, single audit journal, delegation, no rogue access.
- UseCases: support / marketing / research / engineering / finance / data.
- FinalCta: dark ink band bookending the hero ("Build your agent company").
- Trim FAQ to 4 (keep the e2e-referenced Qs); repoint nav/footer anchors to
  the live section ids. Refresh the @visual baseline.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

frontend/src/components/marketing/Faq.tsx

@@ -16,10 +16,6 @@ const FAQS: { q: string; a: string }[] = [
     q: "Can I run it on my own infrastructure?",
     a: "Yes. The same container images deploy to Kubernetes or to a single-node Docker Compose appliance you can run fully air-gapped, installed from a signed bundle that verifies offline.",
   },
-  {
-    q: "Which tools can claws connect to?",
-    a: "Slack and email today, plus a growing app directory you connect with API keys or OAuth. Credentials are held by a separate secret broker the agent can never read.",
-  },
   {
     q: "How is my data protected?",
     a: "Credentials are encrypted at rest in an isolated broker process; agent sandboxes have no egress; and in the air-gapped deployment nothing ever leaves your network.",