refactor(www): move the marketing and design sites to the host build

[KingDoxik]

Stacked on feat/platform-independence (the branch this submodule is currently pinned to), not on oss.

The landing page and the design-system site are cloud-company surfaces rather than open-core product surface, so they move to the host repository. /docs stays here — self-hosters want bundled product docs. Companion PR in voidhash-mono adds the moved code.

What leaves this repo

• Landing — all of features/www/landing/ (sections, paywall-build animation, asteroids easter egg, agent icons, marketing-nav-config).
• Design site — features/design/ (components + 174 MDX content files) and routes/design/. The stale duplicate features/design/source.config.ts is dropped; the live config is features/source.config.ts, which is what Vite loads.

What stays, and why

• routes/_marketing/{route,index}.tsx remain as a ~10-line shell. They have to: a host's landing page and an OSS routes/index.tsx would both generate path / and collide in the merged route tree. Instead index.tsx renders features/www/marketing-home-slot, which here redirects to /studio and which hosts alias to their own landing — the same idiom as the existing slot extension points.
• hero-shader.tsx moves to components/hero-shader.tsx: the auth pages use it, so it is not marketing-owned.
• lib/waitlist.ts and lib/paths.ts stay — studio and auth depend on them, and the host reaches them through @/.
• public/ stays and becomes a shared asset root for both builds.

Deleted rather than moved

Dead once hero/hero.tsx goes: features/www/{button,logo,refraction-stripes,section/section-container,navbar/navigation,hero/hero,hero/footer} and the components/voidhash-gradient-{background,canvas,controls,settings} cluster, which was reachable only from it.

grain-gradient.tsx, lenticular-refraction-pass.tsx and auth-shader.tsx are left alone — already unreferenced before this change, so removing them is a separate cleanup.

fumadocs

/docs and /design shared one config because two mdx() instances clobber each other's .source output. Now that they live in different repos, source.config.ts keeps only docs; a host that adds surfaces replaces the config wholesale and owns the whole .source bundle.

Verification

Standalone build clean from scratch. /design gone, /_marketing/ redirect present, .source contains the docs collection only, tsc --noEmit clean. Publication-boundary check passes.

🤖 Generated with Claude Code

[greptile-apps]

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[github-actions]

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