fix: refresh on-demand media status (#54)

Sense/server/app/sense/media/service.go

@@ -125,6 +125,40 @@ func (s *Service) Reconcile(ctx context.Context, actor identity.Principal, id st
 	identity.RecordAudit(ctx, actor.UserID, "media.reconcile", id, "success", map[string]any{"actual": route.Actual})
 	return route, nil
 }
+
+// Refresh reads the MediaMTX runtime state without reapplying configuration or
+// exposing the source URI. It is safe to call while a playback session polls.
+func (s *Service) Refresh(ctx context.Context, id string) (Route, error) {
+	route, err := s.store.Get(ctx, id)
+	if err != nil {
+		return Route{}, err
+	}
+	if route.Desired != "running" {
+		return route, nil
+	}
+	status, err := s.controller.Status(ctx, route.Path)
+	if err != nil {
+		return route, nil
+	}
+	actual := "waiting"
+	detail := "等待播放器连接并按需拉流"
+	if status.Ready {
+		actual = "ready"
+		detail = "上游拉流正常"
+	}
+	if route.Actual == actual && route.Detail == detail && route.Readers == status.Readers {
+		return route, nil
+	}
+	route.Actual = actual
+	route.Detail = detail
+	route.Readers = status.Readers
+	route.Version++
+	route.UpdatedAt = s.now().UTC()
+	if err := s.store.Save(ctx, route); err != nil {
+		return Route{}, err
+	}
+	return route, nil
+}
 func (s *Service) Stop(ctx context.Context, actor identity.Principal, id string) (Route, error) {
 	route, err := s.store.Get(ctx, id)
 	if err != nil {