Re-enable World ID verification on agent deploy

[mollybeach]

Summary

World ID (Orb-level) verification for sybil-resistant agent deployment was temporarily disabled on the deploy page during testing.

Current state

frontend/app/portfolio/deploy/page.tsx contains:

{/* World ID Required Notice - TEMPORARILY DISABLED */}

The WorldIDVerify component exists and works (frontend/components/WorldIDVerify.tsx) but is not enforced before deploy.

Acceptance criteria

• Re-enable World ID verification gate on /portfolio/deploy
• Block deploy button until Orb verification succeeds
• Store verification nullifier hash in Supabase (optional, for anti-sybil)
• Show clear UX for users who haven't verified yet
• Test in World App MiniKit environment (not just browser)

References

• docs/MINIKIT_VERIFICATION.md — marked complete but disabled for testing
• README: "World ID (IDKit) — Orb-level verification for sybil resistance"