feat(blog): publish 16 app-hub architecture essays

[sarthakagrawal927]

Summary

Publishes 16 recovered technical essays about the Significant Hobbies personal app hub's sync architecture to /blog/:

• A privacy checklist for connecting local-first personal apps
• An offline-first architecture for a family of personal apps
• CloudKit continuity vs. a shared personal app hub
• Designing privacy-safe summaries across personal applications
• Handling sync conflicts without silently discarding local ownership
• How to sync useful summaries without centralizing intimate text
• How to synchronize independent personal apps without blocking local use
• Interoperability patterns for independently useful personal apps
• Preventing account crossover in a shared synchronization queue
• Safe cursor advancement in an incremental sync engine
• Showing provenance for data aggregated from personal apps
• Typed semantic actions for cross-app personal workflows
• Why a personal app hub should begin as a read-only surface
• Why app commits must finish before sync progress advances
• Why each local-first app should retain its own data authority
• Why tombstones matter in personal data synchronization

Details

• Entries appended to blogPosts[] in src/lib/blog-posts.ts — the existing [slug] route, blog index, and sitemap pick them up automatically via editorialArticles.
• Markdown bodies converted to ContentBlock[] (paragraphs, h2/h3 headings, lists, dividers). Markdown emphasis/links flattened to plain text to match the literal-text renderer and existing entries.
• All working sections stripped: ## Outline, every Source Notes variant, every Internal Link Suggestions variant, and inline *(Internal link suggestion: ...)* notes. Next Action / Practical Next Action sections preserved.
• Category: Engineering (new); publishedAt: 'September 2026'; readTime at ~200 wpm; per-topic emoji matching existing style.

Verification

• pnpm typecheck passes
• biome check src/lib/blog-posts.ts clean
• No residue (internal-link suggestions, source notes, frontmatter fields) in generated entries; no duplicate slugs vs. existing posts or content packages.