- Replace stub TunnelServerDemo with full Hummingbird HTTP server
- Add comprehensive debug settings view with server info and controls
- Implement API endpoint listing with interactive testing
- Add TTYForwardManager for tty-fwd integration
- Auto-start HTTP server on app launch on port 8080
- Show server status, port, and base URL in debug panel
- Add test buttons for GET endpoints with live response preview
- Include debug mode toggle and log level selector
- Add quick access to Console.app and Application Support
- Update bundle identifier to sh.vibetunnel.vibetunnel
- Add code signing configuration templates
