Adopt scalable bilingual Astro publishing system

[130U]

Outcome

This turns 130U/portfolio into a version-locked Astro publishing system for a growing bilingual archive, while preserving the approved π₀ article and its WM/WAM interpretation.

Architecture

• Root and collection READMEs are generated from each article's strict post.json manifest and include direct Chinese, English, and web links.
• Astro Content Collections produce the homepage, collection pages, stable /<slug>/ routes, posts.json, RSS, sitemap, canonical URLs, and TechArticle JSON-LD.
• Chinese, English, and aligned bilingual modes use complete build-time HTML; JavaScript is progressive enhancement only.
• KaTeX renders math at build time with no runtime CDN.
• A committed publishing standard, ADR, strict JSON Schemas, source registry, audit record, and collision-safe article scaffold establish the reusable contract.
• Only pushes to main may deploy GitHub Pages; pull requests validate and build.

π₀ integrity

• 57 ordered bilingual semantic pairs, 31 display-equation blocks per language, and 20 unique registered sources are build-gated.
• Language-specific DOM IDs remain unique while shared pair IDs preserve alignment.
• Publication status has a single source of truth in the manifest.
• The article's reasoning and conclusions are unchanged; only presentation metadata, anchor metadata, and portable math delimiters were normalized.

Validation

• npm ci
• npm run check: 0 Astro errors, warnings, or hints
• npm run build: 6 HTML pages and 1 published route; built-site audit passed
• npm audit: 0 vulnerabilities
• Desktop and 390×844 browser QA: 3 language modes, 44 px controls, no duplicate IDs, no overflow, 162 rendered math elements
• Three independent final read-only reviews: no remaining P1/P2 findings

Repository boundary

130U/130U.github.io was used only as a read-only design reference and was not modified.