Add GitHub Pages JavaScript playground

[konard]

Fixes #9.

Summary

• Adds a Vite + TypeScript GitHub Pages documentation app under site/.
• Uses Monaco Editor for the JavaScript playground with runtime hints for Link, LinksConstants, UnitedLinks, api.metric, api.visualize, and sleep.
• Runs playground code in a module worker, imports the generated wasm-pack --target web package, captures console output, renders console.table, metrics, errors, execution duration, and a directed doublets graph.
• Adds .github/workflows/pages.yml for Pages deployment and extends release CI to build the browser demo.
• Updates README with the hosted demo URL and local playground commands.
• Adds tests/docs_site.rs to guard the Pages/demo delivery surface.
• Bumps the package version to 0.1.3.
• Adds the issue case study, evidence, logs, and review screenshots under docs/case-studies/issue-9 and docs/screenshots.

Reproduce Locally

wasm-pack build --release --target web --out-dir site/public/pkg --out-name doublets_web
npm ci --prefix site
npm run dev --prefix site

Production Pages build:

GITHUB_PAGES=true npm run build --prefix site

Verification

• cargo fmt --all -- --check
• cargo check --locked --tests --all-features
• cargo test --locked --target "$(rustc -vV | sed -n 's/^host: //p')"
• cargo clippy --locked --tests --all-features -- -D warnings
• wasm-pack build --release --target bundler --out-dir pkg
• wasm-pack test --node
• npm pack --dry-run from pkg/
• npm audit --prefix site
• wasm-pack build --release --target web --out-dir site/public/pkg --out-name doublets_web
• npm run build --prefix site
• GITHUB_PAGES=true npm run build --prefix site
• Playwright verification of the dev server and production /doublets-web/ artifact path

Screenshots

Desktop:

Mobile:

[konard]

Working session summary

Implemented and finalized PR 10: #10

What changed:

• Added the GitHub Pages Vite/TypeScript playground in site/ with Monaco, worker-based wasm execution, captured console output, metrics, and graph visualization.
• Added Pages deployment workflow and extended release CI to build the browser demo.
• Added README demo docs, issue case study/evidence/logs, screenshots, and tests/docs_site.rs.
• Bumped version to 0.1.3.
• Removed the prepared branch placeholder file from the final PR diff.

Verification:

• Local Rust, wasm-pack, npm audit, Vite builds, and Playwright checks passed.
• Fresh CI for head SHA 6acb97e passed: Ubuntu, macOS, Windows, and “Build and Test npm Package”.
• PR is ready for review, merge state is clean, and the tracked working tree is clean.

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[konard]

🤖 Solution Draft Log

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost estimation:

• Model: GPT-5.5
• Provider: OpenAI
• Public pricing estimate: $26.312156

📊 Context and tokens usage:

• 501.0K / 1.1M (48%) input tokens, 63.6K / 128K (50%) output tokens

Total: (501.0K + 18.4M cached) input tokens, 63.6K output tokens, $26.312156 cost

🤖 Models used:

• Tool: OpenAI Codex
• Requested: gpt-5.5
• Model: GPT-5.5 (gpt-5.5)

📎 Log file uploaded as Repository (95614KB)

• View complete solution draft log

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[konard]

✅ Ready to merge

This pull request is now ready to be merged:

• All CI checks have passed
• No merge conflicts
• No pending changes

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