feat(historyV2): load workflows for images (#6384)

## Summary

Hooked up the "Load Workflow" action to our `history_v2` API.

Note: Our cloud envs were being stress tested right now so images are
loading at time of recording. Images were loading for me during
development before I had time to create the video.


## Screenshots 📷 



https://github.com/user-attachments/assets/02145504-ceae-497b-9049-553796d698da



┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6384-Feat-history-v2-workflows-29b6d73d365081bcb706fe799b8ce66a)
by [Unito](https://www.unito.io)

src/components/sidebar/tabs/QueueSidebarTab.vue

@@ -104,6 +104,7 @@ import { useI18n } from 'vue-i18n'
 
 import NoResultsPlaceholder from '@/components/common/NoResultsPlaceholder.vue'
 import VirtualGrid from '@/components/common/VirtualGrid.vue'
+import { isCloud } from '@/platform/distribution/types'
 import { useSettingStore } from '@/platform/settings/settingStore'
 import type { ComfyNode } from '@/platform/workflow/validation/schemas/workflowSchema'
 import { api } from '@/scripts/api'
@@ -206,7 +207,9 @@ const menuItems = computed<MenuItem[]>(() => {
       label: t('g.loadWorkflow'),
       icon: 'pi pi-file-export',
       command: () => menuTargetTask.value?.loadWorkflow(app),
-      disabled: !menuTargetTask.value?.workflow
+      disabled: isCloud
+        ? !menuTargetTask.value?.isHistory
+        : !menuTargetTask.value?.workflow
     },
     {
       label: t('g.goToNode'),