[Pigbibi]

Summary

Documentation-only: replace historical compatibility rollout notes with current metadata references and add the matching Simplified Chinese README section.

Why

The English compatibility notes describe an earlier rollout and include outdated metadata values. The Chinese README has no corresponding section.

Changes

• Refer to the compatibility fields in qsl.toml instead of duplicating version and ring values.
• Describe the existing dependency installation flow in the present tense.
• Keep the compatibility sections synchronized across the English and Simplified Chinese READMEs.

Testing

• git diff --check passed.
• README checks passed for local links, fenced blocks, language navigation, matching compatibility fields, and changes limited to the two compatibility sections.
• npm ci --ignore-scripts --no-audit --no-fund, node --check main.js, and bash tests/test_workflow_config_sources.sh passed. The local Node.js version differs from the repository's Node.js 20 CI requirement; npm reported an engine warning.
• Natural pull request CI passed.

Risk and rollback

The change affects two README sections. Runtime code, dependencies, workflows, configuration, and existing safety restrictions are unchanged. Revert the documentation commit to restore the previous text.

Breaking changes

none