fix(segmentation): restore navigation for duplicated contour segments (#6038)

---------

Co-authored-by: diattamo <mmddiatta@gmail.com>

extensions/cornerstone/src/commandsModule.ts

@@ -2403,14 +2403,25 @@ function commandsModule({
       targetSegmentInfo?: SegmentInfo;
     }) => {
       if (!targetSegmentInfo) {
+        const sourceSegmentation = segmentationService.getSegmentation(
+          sourceSegmentInfo.segmentationId
+        );
+        const sourceCachedStats =
+          sourceSegmentation?.segments?.[sourceSegmentInfo.segmentIndex]?.cachedStats;
+
         targetSegmentInfo = {
           segmentationId: sourceSegmentInfo.segmentationId,
           segmentIndex: segmentationService.getNextAvailableSegmentIndex(
             sourceSegmentInfo.segmentationId
           ),
         };
+
+        // Copy source cachedStats so jump-to-segment navigation works on the duplicate segment.
         segmentationService.addSegment(targetSegmentInfo.segmentationId, {
           segmentIndex: targetSegmentInfo.segmentIndex,
+          ...(sourceCachedStats && {
+            cachedStats: csUtils.deepClone(sourceCachedStats) as Record<string, unknown>,
+          }),
         });
       }
 

extensions/cornerstone/src/services/SegmentationService/SegmentationService.ts

@@ -896,6 +896,7 @@ class SegmentationService extends PubSubService {
       active?: boolean;
       color?: csTypes.Color; // Add color type
       visibility?: boolean; // Add visibility option
+      cachedStats?: Record<string, unknown>;
     } = {}
   ): void {
     if (config?.segmentIndex === 0) {