- server.listen was hardcoded to 127.0.0.1, causing ERR_CONNECTION_REFUSED on remote access
- Default to 0.0.0.0, add --host flag to override (e.g. --host 127.0.0.1 for local-only)
- Show LAN IP in startup log for easy remote access
- Startup log and error messages switched to English
- Bump version to v0.5.2
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>