feat(content): rewrite blogs for readers and improve editorial covers

[drewstone]

What changed

• Edited all 85 posts against the zero-context reader standard: open with a recognizable problem, define Tangle terms before using them, show public evidence, and end with a practical choice.
• Rewrote the two thinnest catalog/attestation posts into complete reader-first articles with clear limits and FAQs.
• Removed private repository mechanics, internal paths, and unsupported number claims from public prose.
• Reworked titles and openings so every post owns one search question; the audit now finds 85/85 query owners and no discovery-surface issues.
• Replaced the cover system with 14 coherent, text-free editorial WebP assets shared by series and standalone posts.

Proof

• pnpm check:blog — 85 posts, 13 series, 0 errors, 0 warnings.
• node scripts/audit-blog-reader.mjs --json — 0 P0 rewrites, 0 hard rejects, 0 repository debris, 0 style flags, 0 search issues. The remaining 38 P1 and 47 P2 labels are the honest line-edit and factual/link review queue.
• pnpm build — passed and prerendered all blog routes.
• git diff --check — passed.
• Visual proof: rendered editorial cover asset.

The browser capture was run against /blog/30-blueprints after the YAML and WebP fixes; the page rendered with the new cover and reader-first opening.

[tangletools]

✅ Auto-approved drewstone PR — bc18161b

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 · 2026-08-03T07:14:41Z}