Publish 0.4.1 release metadata

[he-chun]

Summary

• publish the tag-workflow-generated v0.4.1 Zotero update manifest
• switch English and Simplified Chinese GitHub download links to v0.4.1
• record the 2026-08-24 release in the changelog and reset Unreleased
• update release metadata assertions and Chrome Web Store reviewer/checklist status

No production code, browser permissions, matching behavior, local protocol, pairing behavior, supported-site behavior, icons, or screenshots change in this PR. Chrome Web Store submission is still only being prepared.

Release closure

• prerelease: https://github.com/he-chun/paper-library-checker/releases/tag/v0.4.1
• XPI SHA-256: 69857a35cf619f4fc7992c4b16d694894b1d7070f0806c06adc4506b0d5c9676
• Chrome ZIP SHA-256: 1d72bdf7473486247511262433cf21d0aa1d34f63b0a6d985e797e175832cba3
• published updates.json SHA-256: cff17b678e450cdc067d526f48c2ee6045b4cccc9ce268b122cb19e1918590c6

All six Release assets were downloaded anonymously and matched their GitHub digests. The published update manifest points to the v0.4.1 XPI and closes over the same XPI hash.

Validation

• npm test (191/191)
• npm run check
• npm run validate:updates