fix: address CLS, add skeleton

Author: graphieros

app/components/Package/WeeklyDownloadStats.vue

@@ -264,7 +264,7 @@ const config = computed<VueUiSparklineConfig>(() => {
 </script>
 
 <template>
-  <div class="space-y-8">
+  <div class="space-y-8 h-[110px] motion-safe:h-[140px]">
     <CollapsibleSection id="downloads" :title="$t('package.downloads.title')">
       <template #actions>
         <ButtonBase
@@ -307,6 +307,10 @@ const config = computed<VueUiSparklineConfig>(() => {
                     <SkeletonInline class="h-px w-full" />
                   </div>
                 </div>
+                <!-- Animation toggle placeholder -->
+                <div class="w-full hidden motion-safe:flex flex-1 items-end justify-end">
+                  <SkeletonInline class="h-[20px] w-30" />
+                </div>
               </div>
             </template>
           </ClientOnly>