- Add vCard/CSV file import with duplicate detection and merge options
- Add Google Contacts OAuth2 integration for importing from Google
- Add vCard/CSV export with format selection and filtering options
- Add connected_accounts table for OAuth token storage
- Add FileUploader, ImportPreview, GoogleImport components
- Add ExportModal with format selection (vCard/CSV)
- Add i18n translations for import/export (DE/EN)
- Add presi web app and CLAUDE.md documentation
- Restructure voxel-lava to apps/web pattern
- Add voxel-lava scripts to root package.json
- Update generate-env.mjs for presi configuration
- Update .env.development with new project variables
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>