- Convert system requirements to table format with architecture info
- Add Windows/macOS file descriptions with recommended options
- Replace Linux section with comprehensive distro-based table
- Include complete installation commands for deb/rpm/AppImage/flatpak
- Add helpful tips for macOS Gatekeeper and AppImage usage
* docs: add download options for each system version in 3.9.0 release note.
* docs: add download options for each system version in 3.9.0 release note.
- Bump version from 3.9.0-3 to 3.9.0 across all config files
- Add comprehensive release notes in English, Chinese, and Japanese
- Update CHANGELOG with v3.9.0 stable and v3.9.0-2 entries
- Update README badges and release note links to v3.9.0