W1 MBTI comparison: render detailed authority sections

[fermatmind]

What changed

• preserve backend-authoritative cross-type comparison groups and items in the CMS adapter
• render detailed paragraphs, grouped stress/growth guidance, and itemized misconceptions without duplicate fallback cards
• add adapter and rendered-output contract coverage for the production package shape

Why

Independent W9 QA found that detailed English comparison fields were present in the frozen candidate package but dropped or partially rendered by the frontend consumer. This isolated baseline repair restores exact visible consumption before W9 is rerun.

Validation

• pnpm exec vitest run tests/contracts/personality-comparison-pages.contract.test.tsx
• pnpm typecheck
• pnpm lint
• pnpm test:contract
• NEXT_PUBLIC_API_URL=https://api.fermatmind.com NEXT_PUBLIC_SITE_URL=https://fermatmind.com pnpm build
• post-rebase: pnpm exec vitest run tests/contracts/personality-comparison-pages.contract.test.tsx tests/contracts/en-content-parity-control-master.contract.test.ts
• git diff --check origin/main...HEAD

Intentionally deferred

• no CMS write, package mutation, import, publication, activation, sitemap, llms, indexability, or production deployment
• independent W9 QA remains a separate PR-train scope and will rerun against the unchanged exact package SHA after this repair merges

Repository rule impact

No ownership or publishing rule changes. Cross-type comparison content remains backend/CMS-authoritative; this PR only fixes the frontend product-code consumer.

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