[Launch] Production Deployment — Vercel, Farcaster, Base App

[realproject7]

Summary

Deploy PlotLink to production on Vercel, complete all Farcaster integrations, set up Base App, and configure Builder Code attribution. Domain: plotlink.xyz (already purchased).

Sub-tickets

1. [#475] Vercel deployment + CI/CD setup #476 — Vercel deployment + CI/CD setup
2. [#475] OPERATOR GATE: Domain DNS, Vercel secrets, Base.dev, Farcaster association #480 — OPERATOR GATE: Domain DNS, Vercel secrets, Base.dev, Farcaster association
3. [#475] Farcaster manifest + SDK integration #477 — Farcaster manifest + SDK integration (depends on [#475] Vercel deployment + CI/CD setup #476)
4. [#475] Base App migration — standard web app compatibility #478 — Base App migration — standard web app compatibility (depends on [#475] Vercel deployment + CI/CD setup #476)
5. [#475] Builder Code (ERC-8021) attribution #479 — Builder Code (ERC-8021) attribution

Context

• Reference: ~/Projects/dropcast (fully deployed with all integrations)
• Base App migrating off Farcaster spec April 9 — PlotLink is Type 3 hybrid (web + Farcaster)
• Builder Code: use EIP-5792 dataSuffix, NOT manual calldata append (dropcast [#284] Fix false recovery intents from wallet rejection #286/[#287] Show Farcaster identity on plot pages #288/[#289] Book-cover style story cards on home page #290)
• Domain: plotlink.xyz already purchased

Acceptance Criteria

• App deployed on Vercel at plotlink.xyz
• Farcaster manifest complete with account association
• Base App compatible (standard web app)
• Builder Code attribution on all onchain txs
• CI/CD: push to main auto-deploys

[realproject7]

All 5 sub-tickets merged and deployed. Vercel live at plotlink.xyz, Farcaster manifest complete, Base App compatible, Builder Code active, CI/CD running.