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
- Implemented Zustand store for S/MIME functionality, including state management for key records and public certificates.
- Added methods for importing PKCS#12 files and public certificates, binding identities to keys, and managing unlocked keys.
- Introduced session storage for remembering unlocked keys across sessions.
- Enhanced error handling and loading states during data operations.
Linus Rath