[code-infra] Update pnpm and clean lint ignores

[lyzno1]

Summary

• Update pnpm to 11.2.2.
• Move pnpm config from .npmrc to pnpm-workspace.yaml.
• Remove obsolete lint ignores and symlink CLAUDE.md to AGENTS.md.

[chatgpt-codex-connector]

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Reviewed commit: 8b38183ced

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[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/react@4889
  

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/utils@4889
  

commit: ef0df9f

[code-infra-dashboard]

Bundle size

Bundle	Parsed size	Gzip size
@base-ui/react	0B(0.00%)	0B(0.00%)

Details of bundle changes

Performance

Total duration: 1,136.35 ms -112.67 ms^(-9.0%) | Renders: 50 ⁽⁺⁰⁾ | Paint: 1,736.14 ms -159.24 ms^(-8.4%)

Test	Duration	Renders
Slider mount (300 instances)	147.77 ms ▼-54.01 ms(-26.8%)	3 (+0)

11 tests within noise — details

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[chatgpt-codex-connector]

💡 Codex Review

base-ui/CLAUDE.md

Line 1 in d32cf16

AGENTS.md

Preserve CLAUDE.md fallback for non-symlink checkouts

Replacing CLAUDE.md with a symlink target string (AGENTS.md) breaks instruction loading on environments where symlinks are not materialized (commonly Windows with core.symlinks=false): Git checks out a plain text file, and Claude reads CLAUDE.md literally, so AGENTS.md is not treated as an import. That means repository guidance is silently skipped for those contributors unless the file contains @AGENTS.md (or a real symlink is guaranteed).

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• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[lyzno1]

This should stay draft for now. The pnpm 11 migration needs the shared CircleCI orb in mui-public to support passing pnpm dlx build approvals for package-overrides first; otherwise the React 18 jobs can hang on the interactive build selection prompt.