fix: detect remote SLAM bridge and clear loading state on response

src/renderer/public/slam-viewer/index.html

@@ -3135,6 +3135,9 @@ renderer.domElement.addEventListener('click', async (event) => {
 });
 
 function applySlamState(state) {
+  // Any valid state payload confirms that the bridge is responding. Missing
+  // ROS data is reported separately by the topic status indicators.
+  markVisualizationResponseReceived();
   latestSlamState = state;
   latestSlamStateReceivedAt = Date.now();
   resetNavigationPoseForNewSession(state);
@@ -3150,7 +3153,6 @@ function applySlamState(state) {
     clearNavigationGoalMarker();
     navigationGoalId = null;
   }
-  if (state?.pose || state?.pose_3d || state?.scan || state?.map || state?.point_cloud || state?.sensor_point_cloud) markVisualizationResponseReceived();
   if (NAV2_VIEW_MODE === 'navigation' && state?.tf?.map_to_odom) {
     navigationMapToOdom = state.tf.map_to_odom;
     updateNavigationMapTransform();