[byoungd]

What changed

This update improves the bilingual guide's first-use paths and makes its learning loop easier to act on and review. It clarifies the five-minute English baseline versus the full four-skill diagnostic, opens research citations through DOI links, aligns issue forms and publication records, and records an evidence-based repository audit and maintenance plan.

It also corrects topic structured data to use Article where pages contain audiences, FAQs, downloads, and next steps; aligns third-party resource review claims with the source register; and makes social-image checks portable across operating systems. The existing author narrative, topic breadth, and Markdown-first privacy model remain intact.

Validation

• PDF_PYTHON=/tmp/up-audit-pdf/bin/python3 npm run check
• npm audit --audit-level=high
• npm run docs:build
• npx playwright test --workers=2 (648 passed)
• npm run book:validate remains for CI: the local environment has no Java runtime.

The audit report describes remaining manual work, including professional review of recovery guidance, claim-by-claim citation review, and human triage of the existing GitHub queue. No user learning records or analytics are uploaded.