test(ContourSegNavigation): Add e2e tests for contour segmentation navigation (#5834)

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Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

platform/ui-next/src/components/Viewport/ViewportActionArrows.tsx

@@ -12,11 +12,20 @@ const arrowClasses =
  */
 function ViewportActionArrows({ onArrowsClick, className }) {
   return (
-    <div className={classNames(className, 'flex')}>
-      <div className={arrowClasses}>
+    <div
+      data-cy="viewport-action-arrows"
+      className={classNames(className, 'flex')}
+    >
+      <div
+        data-cy="viewport-action-arrows-left"
+        className={arrowClasses}
+      >
         <Icons.ArrowLeftBold onClick={() => onArrowsClick(-1)} />
       </div>
-      <div className={arrowClasses}>
+      <div
+        data-cy="viewport-action-arrows-right"
+        className={arrowClasses}
+      >
         <Icons.ArrowRightBold onClick={() => onArrowsClick(1)} />
       </div>
     </div>