- Draft auto-save with configurable interval, status, and manual trigger
- Email template system (save, list, use, delete templates)
- Export messages to JSON, MBOX, or EML format
- Import messages from JSON files
- Register new commands (thread, bulk, export, import, autosave, template)
- Update README.md with documentation for all new commands
Build and tests pass clean.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
