New features
- Translate-all action: translate every link on a page at once, not just one at a time.
- Support for ARIA reader links so the menu works with more accessible/link markup.
- Source-language detection is now cached and persisted in storage to avoid repeat work.

Improvements and fixes
- Context menu now only appears for valid links.
- Several fixes to pull-request / link finding logic.
- OpenAI client gained additional settings handling.
- Added GitHub Copilot instructions and a mise task fix.