[client,management] Feature/client service expose (#5411)

CLI: new expose command to publish a local port with flags for PIN, password, user groups, custom domain, name prefix and protocol (HTTP default).
Management/API: create/renew/stop expose sessions (streamed status), automatic naming/domain, TTL renewals, background expiration, new management RPCs and client methods.
UI/API: account settings now include peer_expose_enabled and peer_expose_groups; new activity codes for peer expose events.

client/server/server.go

@@ -21,6 +21,7 @@ import (
 	gstatus "google.golang.org/grpc/status"
 
 	"github.com/netbirdio/netbird/client/internal/auth"
+	"github.com/netbirdio/netbird/client/internal/expose"
 	"github.com/netbirdio/netbird/client/internal/profilemanager"
 	sleephandler "github.com/netbirdio/netbird/client/internal/sleep/handler"
 	"github.com/netbirdio/netbird/client/system"
@@ -1316,6 +1317,60 @@ func (s *Server) WaitJWTToken(
 	}, nil
 }
 
+// ExposeService exposes a local port via the NetBird reverse proxy.
+func (s *Server) ExposeService(req *proto.ExposeServiceRequest, srv proto.DaemonService_ExposeServiceServer) error {
+	s.mutex.Lock()
+	if !s.clientRunning {
+		s.mutex.Unlock()
+		return gstatus.Errorf(codes.FailedPrecondition, "client is not running, run 'netbird up' first")
+	}
+	connectClient := s.connectClient
+	s.mutex.Unlock()
+
+	if connectClient == nil {
+		return gstatus.Errorf(codes.FailedPrecondition, "client not initialized")
+	}
+
+	engine := connectClient.Engine()
+	if engine == nil {
+		return gstatus.Errorf(codes.FailedPrecondition, "engine not initialized")
+	}
+
+	mgr := engine.GetExposeManager()
+	if mgr == nil {
+		return gstatus.Errorf(codes.Internal, "expose manager not available")
+	}
+
+	ctx := srv.Context()
+
+	exposeCtx, exposeCancel := context.WithTimeout(ctx, 30*time.Second)
+	defer exposeCancel()
+
+	mgmReq := expose.NewRequest(req)
+	result, err := mgr.Expose(exposeCtx, *mgmReq)
+	if err != nil {
+		return err
+	}
+
+	if err := srv.Send(&proto.ExposeServiceEvent{
+		Event: &proto.ExposeServiceEvent_Ready{
+			Ready: &proto.ExposeServiceReady{
+				ServiceName: result.ServiceName,
+				ServiceUrl:  result.ServiceURL,
+				Domain:      result.Domain,
+			},
+		},
+	}); err != nil {
+		return err
+	}
+
+	err = mgr.KeepAlive(ctx, result.Domain)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 func isUnixRunningDesktop() bool {
 	if runtime.GOOS != "linux" && runtime.GOOS != "freebsd" {
 		return false