fix(blog): organize archive by series and audit slop

[drewstone]

Summary

• replace the raw published-count blog archive with series cards, thumbnails, and topic filters
• add pnpm check:blog for deterministic blog/page anti-slop checks
• clean repeated self-improving-series scaffold headings and weak AI-cadence phrases across the archive
• update repo-local blog editor/proof docs with the new editorial gates

Verification

• pnpm check:blog PASS: 80 posts, 12 series, 0 errors, 10 body-artifact warnings
• pnpm build PASS
• Playwright preview screenshots checked for /blog and /research at desktop/mobile
• Playwright filter check: x402 filter reduced archive from 80 rows to 13 x402-tagged rows
• git merge-tree --write-tree origin/master HEAD PASS: 86454a5833d289b878fb9a837f6c160ca3b6b926

Known follow-up

• 10 code-heavy posts still need inline body artifacts such as diagrams or tables; the new audit reports them as warnings, not hard publish blockers.

Supersedes #37; branch was rebased onto current origin/master without force-pushing.

[tangletools]

✅ Auto-approved drewstone PR — 8b1508f6

This PR was opened by the trusted drewstone account.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: drewstone_author · 2026-07-01T17:16:56Z}