Switch project license to Apache-2.0

[euyis1019]

Summary

• replace the project AGPL-3.0 license text with the standard Apache License 2.0
• synchronize the English and Chinese README badges and license sections
• update npm, Python, and Rust package metadata to Apache-2.0
• retain the existing upstream attributions and third-party license texts

Why

Use a permissive project license that lowers the barrier for downstream adoption, integration, modification, and redistribution.

Impact

The current project source will be offered under Apache-2.0 after this change is merged. The licenses retained in THIRD_PARTY_NOTICES.md continue to apply to their respective upstream materials.

Historical Git tags and GitHub releases are versioned snapshots and are not rewritten by this pull request.

Validation

• git diff --check
• confirmed no AGPL references remain in the changed branch
• parsed npm package metadata and Python/Rust TOML manifests
• ran cargo metadata --no-deps
• confirmed both maintained worktrees use the same standard Apache-2.0 license text

[github-actions]

Claude finished @euyis1019's task in 1m 18s —— View job

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PR Review: Switch project license to Apache-2.0

• Reviewed all changed files

No bugs or security issues found. The changes are mechanically consistent across all package manifests and documentation:

• LICENSE: Standard Apache-2.0 text, byte-for-byte correct.
• package.json / package-lock.json: SPDX identifier Apache-2.0 is correct (the previous AGPL-3.0-only SPDX form was also valid; the new form is equivalent for Apache since there is no "or later" variant).
• pyproject.toml: "License :: OSI Approved :: Apache Software License" is the correct PyPI trove classifier for Apache 2.0.
• Cargo.toml: license = "Apache-2.0" is valid SPDX.
• THIRD_PARTY_NOTICES.md, README.md, README.zh.md: License name updated consistently.

One note unrelated to correctness: README.zh.md contains substantially more changes than the PR description mentions (section headings switched from Chinese to English, prose restructured). These don't affect the license switch itself, but reviewers may want to confirm this scope is intentional.

[github-actions]

Automated Claude review completed. Review run: https://github.com/lexmount/Lexbench-Headless-Browser/actions/runs/32169037917. Please check Claude's inline feedback and summary comment for details.