[codex] Add guided ProofLoop setup builder

[HomenShum]

Summary

• Add a guided ProofLoop setup builder modeled on the conversational “Build a voice agent” setup pattern.
• Users can describe a use case or tap templates for live URL flow, accounting agent, memory pipeline, or research copilot.
• The builder stays static/local-only and generates a copyable npx proofloop target command, including --url when the prompt contains a URL.
• Add responsive styling and site tests for the builder contract.

Validation

• npm run build
• npm test -> 13 files, 83 tests
• node dist\\cli.js gate
• Live local browser check at http://127.0.0.1:5432
  • builder rendered
  • template click populated prompt
  • URL input generated npx proofloop target --url https://example.com --write-runner-plan
  • mobile 390px viewport had no horizontal overflow

[vercel]

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Project	Deployment	Actions	Updated (UTC)
proofloop	Ready	Preview, Comment	Jul 7, 2026 4:15am