Add asset deletion progress indicator (#7906)

## Summary

Currently the delay between user action and visual response is too long
and it looks like it hasn't worked.
This adds a visual indicator that the action is processing.

## Changes

- add loading indicator while asset is deleting

## Screenshots (if applicable)
(Artifically delayed deletion)


https://github.com/user-attachments/assets/a9a8b9fe-896d-4666-b643-ec8b990f6444

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7906-Add-asset-deletion-progress-indicator-2e26d73d365081ed82b8e770ba3d0615)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Alexander Brown <drjkl@comfy.org>
Co-authored-by: Jin Yi <jin12cc@gmail.com>

src/components/sidebar/tabs/AssetsSidebarTab.vue

@@ -331,7 +331,7 @@ const {
 
 const {
   downloadMultipleAssets,
-  deleteMultipleAssets,
+  deleteAssets,
   addMultipleToWorkflow,
   openMultipleWorkflows,
   exportMultipleWorkflows
@@ -495,8 +495,9 @@ const handleBulkDownload = (assets: AssetItem[]) => {
 }
 
 const handleBulkDelete = async (assets: AssetItem[]) => {
-  await deleteMultipleAssets(assets)
-  clearSelection()
+  if (await deleteAssets(assets)) {
+    clearSelection()
+  }
 }
 
 const handleClearQueue = async () => {
@@ -524,6 +525,17 @@ const handleBulkExportWorkflow = async (assets: AssetItem[]) => {
   clearSelection()
 }
 
+const handleDownloadSelected = () => {
+  downloadMultipleAssets(selectedAssets.value)
+  clearSelection()
+}
+
+const handleDeleteSelected = async () => {
+  if (await deleteAssets(selectedAssets.value)) {
+    clearSelection()
+  }
+}
+
 const handleZoomClick = (asset: AssetItem) => {
   const mediaType = getMediaTypeFromFilename(asset.name)
 
@@ -672,16 +684,6 @@ const copyJobId = async () => {
   }
 }
 
-const handleDownloadSelected = () => {
-  downloadMultipleAssets(selectedAssets.value)
-  clearSelection()
-}
-
-const handleDeleteSelected = async () => {
-  await deleteMultipleAssets(selectedAssets.value)
-  clearSelection()
-}
-
 const handleApproachEnd = useDebounceFn(async () => {
   if (
     activeTab.value === 'output' &&