fix: Enhance multiframe instance handling and improve instance valida… (#5956)

fix: Enhance multiframe instance handling and improve instance validation

- Updated `getDisplaySetInfo` to ensure local file frame imageIds resolve correctly, falling back to the source multiframe instance when necessary.
- Improved instance filtering in `isDisplaySetReconstructable` to handle undefined instances more robustly.
- Modified `App` prop types to make `routerBasename` optional and added new props for loading indicators and data sources.
- Refactored `CinePlayer` component to replace Button with a div for better accessibility and interaction.

extensions/default/src/getSopClassHandlerModule.js

@@ -48,12 +48,20 @@ function getDisplaySetInfo(instances) {
     let firstTimePointInstances;
 
     if (instances[0].NumberOfFrames > 1 && timePoints.length > 1) {
-      // handle multiframe dynamic volume
-      firstTimePointInstances = timePoints[0].map(imageId => metaData.get('instance', imageId));
+      // Handle multiframe dynamic volumes. Local file frame imageIds do not
+      // always resolve to a frame-level instance object, so keep resolved
+      // entries and fall back to the source multiframe instance when needed.
+      firstTimePointInstances = timePoints[0]
+        .map(imageId => metaData.get('instance', imageId))
+        .filter(Boolean);
+
+      if (!firstTimePointInstances.length) {
+        firstTimePointInstances = [instances[0]];
+      }
     } else {
       // O(n) to convert it into a map and O(1) to find each instance
       instances.forEach(instance => instancesMap.set(instance.imageId, instance));
-      firstTimePointInstances = timePoint.map(imageId => instancesMap.get(imageId));
+      firstTimePointInstances = timePoint.map(imageId => instancesMap.get(imageId)).filter(Boolean);
     }
     displaySetInfo = isDisplaySetReconstructable(firstTimePointInstances, appConfig);
   } else {