refactor: replace custom formatExecutionTime with formatDuration utility

- Use existing formatDuration util from shared utils instead of custom
  implementation
  - Extract execution time formatting to computed property for cleaner
  template
  - Remove 'any' type assertion in MediaAssetActions, use proper types

src/components/sidebar/tabs/AssetsSidebarTab.vue

@@ -15,7 +15,7 @@
           <i class="icon-[lucide--copy] size-4" />
         </button>
         <span class="ml-auto text-sm text-neutral-500">
-          {{ formatExecutionTime(folderExecutionTime) }}
+          {{ formattedExecutionTime }}
         </span>
       </div>
     </template>
@@ -110,7 +110,10 @@ import MediaAssetCard from '@/platform/assets/components/MediaAssetCard.vue'
 import { useMediaAssets } from '@/platform/assets/composables/useMediaAssets'
 import type { AssetItem } from '@/platform/assets/schemas/assetSchema'
 import { ResultItemImpl } from '@/stores/queueStore'
-import { getMediaTypeFromFilenamePlural } from '@/utils/formatUtil'
+import {
+  formatDuration,
+  getMediaTypeFromFilenamePlural
+} from '@/utils/formatUtil'
 
 const activeTab = ref<'input' | 'output'>('input')
 const mediaAssets = ref<AssetItem[]>([])
@@ -119,6 +122,11 @@ const folderPromptId = ref<string | null>(null)
 const folderExecutionTime = ref<number | undefined>(undefined)
 const isInFolderView = computed(() => folderPromptId.value !== null)
 
+const formattedExecutionTime = computed(() => {
+  if (!folderExecutionTime.value) return ''
+  return formatDuration(folderExecutionTime.value * 1000)
+})
+
 const toast = useToast()
 
 // Use unified media assets implementation that handles cloud/internal automatically
@@ -280,16 +288,4 @@ const copyJobId = async () => {
     }
   }
 }
-
-const formatExecutionTime = (seconds?: number): string => {
-  if (!seconds) return ''
-
-  const minutes = Math.floor(seconds / 60)
-  const remainingSeconds = Math.floor(seconds % 60)
-
-  if (minutes > 0) {
-    return `${minutes}m ${remainingSeconds}s`
-  }
-  return `${remainingSeconds}s`
-}
 </script>

src/platform/assets/components/MediaAssetActions.vue

@@ -37,11 +37,8 @@ const emit = defineEmits<{
 const { asset, context } = inject(MediaAssetKey)!
 const actions = useMediaAssetActions()
 
-// Get asset type from context or tags
 const assetType = computed(() => {
-  // Check if asset has tags property (AssetItem type)
-  const assetWithTags = asset.value as any
-  return context?.value?.type || assetWithTags?.tags?.[0] || 'output'
+  return context?.value?.type || asset.value?.tags?.[0] || 'output'
 })
 
 const handleDelete = () => {