fix(react-doctor): clear misc architecture warnings

[bntvllnt]

Summary

• Replaced render-in-render/render-prop patterns with React node/component props and extracted slideshow/canvas-shell subcomponents.
• Added a public stable event-callback listener helper and used it for document listeners.
• Cleaned react-doctor: misc — render-in-render, polymorphic children, giant components (~40 warnings) #277 polymorphic children, router method destructuring, passive listener, and generated registry copies.

Validation

• pnpm -F @vllnt/ui lint
• pnpm -F @vllnt/ui exec tsc --noEmit --project tsconfig.build.json
• pnpm -F @vllnt/ui-registry exec tsc --noEmit --project tsconfig.json
• pnpm build
• pnpm test:once (216 files, 1215 tests)
• npx --yes react-doctor . --offline --json targeted react-doctor: misc — render-in-render, polymorphic children, giant components (~40 warnings) #277 rules: targeted warnings 0
• npx --yes react-doctor . --diff origin/main --annotations --fail-on error --offline exits 0; remaining annotations are unrelated issue families
• git diff --check

Closes #277

[vercel]

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Project	Deployment	Actions	Updated (UTC)
storybook	Ready	Preview, Comment	May 13, 2026 0:52am
ui.vllnt.ai	Ready	Preview, Comment	May 13, 2026 0:52am