chore: remove @openuidev/thesys from examples

[devin-ai-integration]

What

@openuidev/thesys was still declared as a dependency in 9 examples even though none of them import it anymore (they moved to openuiLibrary / lang-core cloud prompts in #1119). This drops the dead dependency and the webpack externalization that only existed to keep it out of the server bundle.

Changes

• Remove @openuidev/thesys from package.json in: google-adk, langgraph-platform, mastra, vercel-ai-sdk, vercel-eve, fastapi/frontend, grok-build, pi, supabase
• Regenerate pnpm-lock.yaml and package-lock.json for each (same commands as scripts/manage-starters.mjs examples update)
• harnesses/pi/next.config.ts: drop @openuidev/thesys from serverExternalPackages and the commonjs externals branch (the @earendil-works/pi-coding-agent externalization stays)
• harnesses/grok-build/next.config.ts: remove the webpack.externals block entirely; it only externalized @openuidev/thesys. --webpack build flag left as-is.

Templates (templates/openui-cloud) still import @openuidev/thesys and are intentionally untouched.

Test Plan

• Verified locally — pnpm install --frozen-lockfile + pnpm run verify (tsc + build, plus vitest where present) passes for all 9 changed examples
• rg "openuidev/thesys" examples returns no matches

Checklist

• I linked a related issue, if applicable
• I updated docs/README when needed (no README referenced the package)
• I considered backwards compatibility

Link to Devin session: https://app.devin.ai/sessions/7ea5f6432e654b9880f1b715b62537ba
Open in Devin Desktop: https://app.devin.ai/desktop/session/7ea5f6432e654b9880f1b715b62537ba?variant=devin

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Project	Deployment	Actions	Updated
openui-docs	Ready	Preview	Sep 17, 2026 2:08am UTC