* chore(governance): make React/TS conventions mandatory via executable gates
Add AGENTS.md, QUALITY_GATES.md, ARCHITECTURE_AND_CODE_QUALITY.md, and
REVIEW_AND_PR_FRAMEWORK.md as the binding conventions and PR review
contract for humans and all coding/review agents.
Add a single 'npm run verify' command (format + lint + build + test +
governance) and 'npm run governance', which runs a dependency-free godfile
ratchet (whole-repo, baseline in scripts/governance-baseline.json) and a
changed-file maintainability gate (complexity<=20, function<=150, params<=4,
depth<=4) via ESLint. Legacy is handled by ratchets, not relaxation: 5
godfiles over 500 lines are grandfathered debt; maintainability thresholds
apply to changed TS/TSX (72 legacy violations across ~51 files otherwise).
Add a repo-owned 'governance' CI job that runs 'npm run verify' so every
gate is guaranteed from this repository, independent of the org reusable
workflow.
* fix(governance): make frontend ratchets fail closed
Self-contained CDK app (S3 + CloudFront + OIDC deploy role) deployed via the org reusable cd-cdk.yaml. Frontend served on dev.seahaven.com with the *.seahaven.com cert and a Route 53 apex alias; the SPA calls the dev backend directly at https://api.dev.seahaven.com/api.
