feat(socket-handler): implement direct socket passing for DNS and email services

- Add socket-handler mode eliminating internal port binding for improved performance
- Add `dnsDomain` config option for automatic DNS-over-HTTPS (DoH) setup
- Add `useSocketHandler` flag to email config for direct socket processing
- Update SmartProxy route generation to support socket-handler actions
- Integrate smartdns with manual HTTPS mode for DoH without port binding
- Add automatic route creation for DNS paths when dnsDomain is configured
- Update documentation with socket-handler configuration and benefits
- Improve resource efficiency by eliminating internal port forwarding

changelog.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## 2025-01-29 - 2.13.0 - feat(socket-handler)
+Implement socket-handler mode for DNS and email services, enabling direct socket passing from SmartProxy
+
+- Add `dnsDomain` configuration option that automatically sets up DNS server with DNS-over-HTTPS (DoH) support
+- Implement socket-handler mode for email services with `useSocketHandler` flag in email configuration
+- Update SmartProxy route generation to create socket-handler actions instead of port forwarding
+- Add automatic route creation for DNS paths `/dns-query` and `/resolve` when dnsDomain is configured
+- Enhance UnifiedEmailServer with `handleSocket` method for direct socket processing
+- Configure DnsServer with `manualHttpsMode: true` to prevent HTTPS port binding while enabling DoH
+- Improve performance by eliminating internal port forwarding overhead
+- Update documentation with socket-handler mode configuration and benefits
+
 ## 2025-05-16 - 2.12.0 - feat(smartproxy)
 Update documentation and configuration guides to adopt new route-based SmartProxy architecture