[visuals] Add reusable BTST product-proof asset kit

[olliethedev]

Summary

• add a deterministic Playwright/Sharp capture workflow backed by the generated Next.js app and a coherent, non-sensitive BTST fixture
• add eight reusable static proof assets: README hero, ownership diagram, Blog, Form Builder, UI Builder, OpenAPI, AI Chat, and code-to-result
• add a manifest/checker for format, dimensions, byte budgets, alt text, captions, editable source, and stale/personal copy
• wire the new assets into the README and relevant docs pages
• remove replaced assets, including the 14.6 MB UI Builder GIF, stale Chat and architecture images, and superseded Blog/Form/OpenAPI screenshots; all deletions remain recoverable through Git history

Validation

• Node 22 / pnpm 10.17.1
• two identical capture runs produced matching SHA-256 hashes for all eight assets
• asset checker: 8 assets, 224,951 bytes total under the 1.8 MB limit
• product-proof checker tests: 4 passing
• frozen lockfile install
• repository lint
• package typecheck
• production docs build
• GitHub Markdown API render
• agent-browser production verification at 1440x900 and 390x844 in light and dark themes, with complete images and no console errors

Closes #259

[vercel]

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2 Skipped Deployments

Project	Deployment	Actions	Updated
better-stack-docs	Ignored		Sep 1, 2026 7:21pm UTC
better-stack-playground	Ignored		Sep 1, 2026 7:21pm UTC

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-01T19:25:34.357343Z	8dc311c	Draft marked ready

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 8dc311ca8a

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[chatgpt-codex-connector]

Remove all seeded records in the finalizer

When this capture runs against a generated app that is subsequently reused, the finally block deletes only the Media fixture, leaving the three Blog posts, Comment, and UI Builder page in the shared adapter. A failed run also leaves whichever of those records were created before the failure. This contradicts the documented before-and-after cleanup contract and can change later E2E results or leave dogfood content visible; track and delete all seeded fixture records here alongside the Media cleanup.

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