fix: Navigate to contour should work (#5718)

* fix: Navigate to contour should work

* Switched back to jump to segment center for hte unit tests

platform/docs/docs/platform/services/data/SegmentationService.md

@@ -56,6 +56,7 @@ setActiveSegmentation(viewportId, segmentationId)
 getSegmentations()
 getSegmentation(segmentationId)
 jumpToSegmentCenter(segmentationId, segmentIndex, viewportId)
+jumpToSegmentNext(segmentationId, segmentIndex, forViewportId?, direction?, highlightAlpha?, highlightSegment?, animationLength?, highlightHideOthers?, animationFunctionType?)
 highlightSegment(segmentationId, segmentIndex, viewportId)
 ```
 
@@ -174,3 +175,59 @@ segmentationService.setSegmentColor(
   [255, 0, 0, 255] // RGBA
 );
 ```
+
+### Navigation
+
+#### jumpToSegmentNext
+
+Jumps to the next or previous slice that contains the specified segment in the viewport. This method handles both labelmap and contour segmentations:
+- For **labelmaps**: Jumps to the segment center
+- For **contours**: Cycles through all slices that contain contour data for the segment in the specified direction
+
+```typescript
+segmentationService.jumpToSegmentNext(
+  segmentationId: string,
+  segmentIndex: number,
+  forViewportId?: string,           // Optional viewport ID. If not provided, applies to all viewports with this segmentation
+  direction?: number,                // 1 for forward (default), -1 for backward
+  highlightAlpha?: number,           // Alpha value for highlighting (0-1), default: 0.9
+  highlightSegment?: boolean,        // Whether to highlight the segment after jumping, default: true
+  animationLength?: number,          // Length of highlight animation in milliseconds, default: 750
+  highlightHideOthers?: boolean,     // Whether to hide other segments during highlight, default: false
+  animationFunctionType?: EasingFunctionEnum // The easing function to use for animation, default: EASE_IN_OUT
+)
+```
+
+**Navigation Behavior:**
+- **Forward (direction = 1)**: Finds the next slice after the current one that contains the segment. If no slice is found after the current one, wraps around to the first slice with the segment.
+- **Backward (direction = -1)**: Finds the previous slice before the current one that contains the segment. If no slice is found before the current one, wraps around to the last slice with the segment.
+
+**Example Usage:**
+
+```typescript
+// Jump to next slice with segment 1
+segmentationService.jumpToSegmentNext(
+  segmentationId,
+  1, // segmentIndex
+  'viewport-1'
+);
+
+// Jump to previous slice with segment 2, with custom highlighting
+segmentationService.jumpToSegmentNext(
+  segmentationId,
+  2, // segmentIndex
+  'viewport-1',
+  -1, // backward direction
+  0.95, // highlightAlpha
+  true, // highlightSegment
+  1000, // animationLength in ms
+  true // highlightHideOthers
+);
+
+// Apply to all viewports with this segmentation
+segmentationService.jumpToSegmentNext(
+  segmentationId,
+  1 // segmentIndex
+  // forViewportId omitted - applies to all viewports
+);
+```