Sync Dev

[PythonSmall-Q]

Summary by cubic

Syncs dev with master, upgrades CI to actions/checkout v6, and bumps XMOJ to 2.7.2 with safer contest PID handling, robust submit-link detection, and 5‑digit AC code export.

• Bug Fixes

  • Contest PID may be missing: fetch contest page, cache PIDs, and only append when available.
  • Submit button: find by link text “提交” instead of brittle nth-child selectors.
  • AC code export: parse header line to support 5‑digit IDs and skip malformed entries.
  • Bump script and package versions to 2.7.2; add 2.5.1–2.7.2 (incl. 2.6.0, 2.7.0–2.7.2) entries to Update.json.

• CI/CD

  • Upgrade actions/checkout to v6 across workflows.
  • Add guards: UpdateVersion runs only for local PRs and skips github-actions bot; UpdateToRelease skips bot PRs and passes the correct PR number.
  • Prerelease npm publish step is commented out.

^{Written for commit 8e01ee2. Summary will update on new commits.}

[boomzero]

Wrong version

[boomzero]

Also endless recursion in CI again

[boomzero]

@PythonSmall-Q

[PythonSmall-Q]

真不知道为什么啊我明明控了但是为什么就不行 @boomzero