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/sidebar/tabs/AssetsSidebarGridView.vue

@@ -2,7 +2,7 @@
   <div class="flex h-full flex-col">
     <!-- Active Jobs Grid -->
     <div
-      v-if="isQueuePanelV2Enabled && activeJobItems.length"
+      v-if="!isInFolderView && isQueuePanelV2Enabled && activeJobItems.length"
       class="grid max-h-[50%] scrollbar-custom overflow-y-auto"
       :style="gridStyle"
     >
@@ -70,12 +70,14 @@ import { useSettingStore } from '@/platform/settings/settingStore'
 const {
   assets,
   isSelected,
+  isInFolderView = false,
   assetType = 'output',
   showOutputCount,
   getOutputCount
 } = defineProps<{
   assets: AssetItem[]
   isSelected: (assetId: string) => boolean
+  isInFolderView?: boolean
   assetType?: 'input' | 'output'
   showOutputCount: (asset: AssetItem) => boolean
   getOutputCount: (asset: AssetItem) => number