fix!: set duration to null when not present (#26982)

e2e/src/ui/generators/timeline/rest-response.ts

@@ -332,7 +332,7 @@ export function toAssetResponseDto(asset: MockTimelineAsset, owner?: UserRespons
     isArchived: false,
     isTrashed: asset.isTrashed,
     visibility: asset.visibility,
-    duration: asset.duration || '0:00:00.00000',
+    duration: asset.duration,
     exifInfo,
     livePhotoVideoId: asset.livePhotoVideoId,
     tags: [],

e2e/src/ui/mock-network/broken-asset-network.ts

@@ -40,7 +40,7 @@ export const createMockStackAsset = (ownerId: string): AssetResponseDto => {
     isArchived: false,
     isTrashed: false,
     visibility: AssetVisibility.Timeline,
-    duration: '0:00:00.00000',
+    duration: null,
     exifInfo: {
       make: null,
       model: null,