- Add compose.py with async actions that export messages via himalaya
- Add apple_mail.py utilities using mailto: URLs and open command
- No AppleScript automation for compose/reply/forward (only calendar replies)
- Update app.py to call async reply/forward actions
- Add SMTP OAuth2 support (disabled by default) in mail.py and auth.py
- Add config options for SMTP send and auto-send via AppleScript
