fix: display active jobs in oldest-first order in media assets panel (#8561)

## Summary

Active jobs (pending/running) in the media assets panel now display in
FIFO order - oldest jobs first (first to be processed at top). This
matches the queue processing order and the old queue panel behavior.

## Changes

- **AssetsSidebarListView.vue**: Add `.toReversed()` to `activeJobItems`
computed to reverse job order for display
- **AssetsSidebarGridView.vue**: Same change for grid view consistency
- **AssetsSidebarListView.test.ts**: Unit test verifying oldest-first
ordering

## Root Cause

PR #8225 changed sorting from `queueIndex` to `createTime` descending in
`useJobList.ts`, which placed newest jobs first. For active jobs, users
expect oldest first (FIFO - first to be processed appears at top).

## Solution

Rather than modifying the shared `useJobList` composable (which serves
both the assets panel and queue overlay), the fix applies
`.toReversed()` at the view layer for the active jobs section only.
This:
- Preserves the newest-first order for completed/history jobs
- Displays active jobs in oldest-first order
- Maintains backward compatibility with the queue overlay

## Testing

- Unit test added to verify FIFO ordering of active jobs
- All existing `useJobList` tests pass

Fixes COM-14151

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
* Corrected the display order of active jobs in the sidebar to show jobs
in oldest-first (FIFO) sequence.

* **Tests**
* Added unit tests for the assets sidebar list view to verify job
ordering and filtering behavior.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8561-fix-display-active-jobs-in-oldest-first-order-in-media-assets-panel-2fc6d73d365081c6bf31cb076a8d6014)
by [Unito](https://www.unito.io)

src/components/sidebar/tabs/AssetsSidebarGridView.vue

@@ -102,7 +102,7 @@ const isQueuePanelV2Enabled = computed(() =>
 type AssetGridItem = { key: string; asset: AssetItem }
 
 const activeJobItems = computed(() =>
-  jobItems.value.filter((item) => isActiveJobState(item.state))
+  jobItems.value.filter((item) => isActiveJobState(item.state)).toReversed()
 )
 
 const assetItems = computed<AssetGridItem[]>(() =>