M1: broadcast focus updates, expiry uses Expire outcome

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

internal/web/web.go

@@ -31,7 +31,9 @@ type Server struct {
 }
 
 func NewServer(ctrl *session.Controller) *Server {
-	return &Server{ctrl: ctrl, bcast: NewBroadcaster()}
+	s := &Server{ctrl: ctrl, bcast: NewBroadcaster()}
+	ctrl.SetOnChange(s.broadcast)
+	return s
 }
 
 func (s *Server) Router() *gin.Engine {
@@ -154,7 +156,7 @@ func (s *Server) armExpiry() {
 		d = 0
 	}
 	s.timer = time.AfterFunc(d, func() {
-		if err := s.ctrl.Complete(); err == nil {
+		if err := s.ctrl.Expire(); err == nil {
 			s.broadcast()
 		}
 	})
@@ -179,7 +181,7 @@ func (s *Server) Init() {
 		s.armExpiry()
 		return
 	}
-	if err := s.ctrl.Complete(); err == nil {
+	if err := s.ctrl.Expire(); err == nil {
 		s.broadcast()
 	}
 }