Add Windows service to handle WireGuard tunnel operations with elevated privileges. Implement IPC server on TCP port 53189 for client-service communication using JSON protocol. Add install-service and uninstall-service commands to NSIS installer hooks for automatic service installation. Replace direct WireGuard calls with IPC requests when running on Windows. Add TunnelRequest and TunnelResponse types for IPC protocol
Add sync_profile command to fetch latest profile from backend without re-enrollment. Add DeviceView struct to EnrollResponse. Replace hardcoded "just now" timestamp with now_label helper using Unix epoch seconds. Add sync button to UI with loading state. Redesign client interface with top strip containing brand lockup and action buttons, hero surface with profile metadata tiles, body grid with login/status panels and resources sidebar
