test: fix scroll flicker

web/src/lib/components/assets/thumbnail/Thumbnail.svelte

@@ -206,7 +206,7 @@
 
 <div
   class={[
-    'group flex overflow-hidden transition-[background-color,border-radius] focus-visible:outline-none',
+    'group flex overflow-hidden focus-visible:outline-none',
     backgroundColorClass,
     { 'rounded-xl': selected },
   ]}
@@ -250,12 +250,12 @@
     >
       <ImageThumbnail
         class={[
-          'absolute transition-[border-radius] group-focus-visible:rounded-lg',
+          'absolute group-focus-visible:rounded-lg',
           { 'rounded-xl': selected },
           imageClass,
         ]}
         brokenAssetClass={[
-          'z-1 absolute group-focus-visible:rounded-lg transition-[border-radius]',
+          'z-1 absolute group-focus-visible:rounded-lg',
           { 'rounded-xl': selected },
           brokenAssetClass,
         ]}

web/src/lib/components/timeline/Timeline.svelte

@@ -616,7 +616,7 @@
 <!-- Right margin MUST be equal to the width of scrubber -->
 <section
   id="asset-grid"
-  class={['h-full scrollbar-hidden overflow-y-auto outline-none', { 'm-0': isEmpty }, { 'ms-0': !isEmpty }]}
+  class={['h-full overflow-y-auto outline-none scrollbar-hidden', { 'm-0': isEmpty }, { 'ms-0': !isEmpty }]}
   style:margin-inline-end={(usingMobileDevice ? 0 : scrubberWidth) + 'px'}
   tabindex="-1"
   bind:clientHeight={timelineManager.viewportHeight}