Add Flower Box PolyCSS experiment

[alowpoly]

Summary

• Adds the source-only Flower Box adapter at /flower/ with the complete 9,331-state prepared cycle, 1,200 stable retained triangle leaves, and one retained rotation root.
• Publishes the q40 prepared visual bank as a hash-pinned prerelease artifact: 29,334,538-byte archive, 29,579,964-byte verified product closure, and two-page browser residency.
• Extends the Netlify deploy, sitemap, social preview, source-only audit, and retained-DOM browser smoke coverage.

Runtime boundary

• Retained DOM PolyCSS and PolyCSS Morph only.
• No runtime geometry construction, projection, rasterization, normal calculation, lighting calculation, or DOM growth.
• No Canvas, SVG renderer, WebGL, WebGPU, Three.js, pixelmatch, native replay, or alternate renderer.
• No Microsoft source or binaries, native captures, or oracle packets are committed or packaged.

Validation

• pnpm verify:source-only
• pnpm typecheck
• pnpm verify:flowerbox:bank
• pnpm verify:flowerbox:runtime
• pnpm build:lib
• pnpm build:deploy
• pnpm test:flowerbox:browser
• pnpm test:flowerbox:deploy
• Clean remote artifact fetch and full SHA-256 closure verification

Development and deploy browser captures are byte-identical at the retained smoke state.

[netlify]

✅ Deploy Preview for cssgraphics ready!

Name	Link
🔨 Latest commit	0abc208
🔍 Latest deploy log	https://app.netlify.com/projects/cssgraphics/deploys/6a74cff389c2ee0008c65dfb
😎 Deploy Preview	https://deploy-preview-4--cssgraphics.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

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[alowpoly]

Remote deploy verification passed on the Netlify preview:

• HTTP 200 at /flower/
• 1,200 stable retained leaves and one stable rotation root at ticks 0, 102, 831, 9,330, and 9,331
• zero Canvas and SVG elements
• zero runtime geometry, projection, raster, normal, or lighting construction; no DOM growth
• initial Flower product transfer: 974,022 bytes across 9 requests
• browser page residency remained within the two-page budget

The full q40 bank remains static/on-demand; the 29,334,538-byte release archive is deploy transport and is not downloaded wholesale by visitors.