feat: update README.md to reflect version 1.4.0 and new features
chore: bump version to 1.4.0 in VERSION and package files
feat: implement identity refresh behavior in identity management
feat: add TNEF support for Outlook emails and archive organization modes
feat: enhance UI with configurable sidebar apps and branding options
refactor: remove unused addon-plugin-theme-concept.md file
- Keep show/hide details button in place when expanded (#18)
- Use i18n translations for details toggle text
- Split instrumentation for Edge Runtime compatibility
- Patch minimatch ReDoS (CVE-2026-27903)