Add expandable output stacks to assets list view (#8283)

Add expandable output stacks to the assets list view.

Monolith ver. of https://github.com/Comfy-Org/ComfyUI_frontend/pull/8298
and its children

List view currently collapses multi-output jobs into a single row, which
makes sibling outputs easy to miss and causes selection/zoom behavior to
drift once items are expanded elsewhere. This change adds a stack toggle
to list rows, expands child outputs derived from job data, and keeps
list-view selection and gallery navigation aligned with the expanded
list. Output mapping and “load full outputs” checks are centralized so
folder view and stacks share the same helper, and job-detail parsing now
yields previewable outputs for the list view. Asset actions now prefer
metadata prompt IDs to support the composite IDs used by stacked
outputs.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8283-Add-expandable-output-stacks-to-assets-list-view-2f16d73d365081a99fc6f1519ac2e57c)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Johnpaul Chiwetelu <49923152+Myestery@users.noreply.github.com>

src/components/queue/QueueProgressOverlay.vue

@@ -264,6 +264,7 @@ const focusAssetInSidebar = async (item: JobListItem) => {
     throw new Error('Asset not found in media assets panel')
   }
   assetSelectionStore.setSelection([assetId])
+  assetSelectionStore.setLastSelectedAssetId(assetId)
 }
 
 const inspectJobAsset = wrapWithErrorHandlingAsync(