feat: add job history and assets sidebar badge behavior (#9050)

## Summary
Add sidebar badge behavior for queue/asset visibility updates:
- Job History tab icon shows active jobs count (`queued + running`) only
when the Job History panel is closed.
- Assets tab icon no longer mirrors active jobs; when QPO V2 is enabled
it now shows the number of assets added since the last time Assets was
opened.
- Opening Assets clears the unseen added-assets badge count.

## Changes
- Added `iconBadge` logic to Job History sidebar tab.
- Replaced Assets sidebar badge source with new unseen-assets counter
logic.
- Added `assetsSidebarBadgeStore` to track unseen asset additions from
history updates and reset on Assets open.
- Added/updated unit tests for both sidebar tab composables and the new
store behavior.


https://github.com/user-attachments/assets/33588a2a-c607-4fcc-8221-e7f11c3d79cc



┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9050-fix-add-job-history-and-assets-sidebar-badge-behavior-30e6d73d365081c38297fe6aac9cd34c)
by [Unito](https://www.unito.io)

---------

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

src/stores/queueStore.ts

@@ -479,6 +479,7 @@ export const useQueueStore = defineStore('queue', () => {
   const runningTasks = shallowRef<TaskItemImpl[]>([])
   const pendingTasks = shallowRef<TaskItemImpl[]>([])
   const historyTasks = shallowRef<TaskItemImpl[]>([])
+  const hasFetchedHistorySnapshot = ref(false)
   const maxHistoryItems = ref(64)
   const isLoading = ref(false)
 
@@ -557,7 +558,7 @@ export const useQueueStore = defineStore('queue', () => {
         currentHistory.map((impl) => [impl.jobId, impl])
       )
 
-      historyTasks.value = sortedHistory.map((job) => {
+      const nextHistoryTasks = sortedHistory.map((job) => {
         const existing = existingByJobId.get(job.id)
         if (!existing) return new TaskItemImpl(job)
         // Recreate if outputs_count changed to ensure lazy loading works
@@ -566,6 +567,15 @@ export const useQueueStore = defineStore('queue', () => {
         }
         return existing
       })
+
+      const isHistoryUnchanged =
+        nextHistoryTasks.length === currentHistory.length &&
+        nextHistoryTasks.every((task, index) => task === currentHistory[index])
+
+      if (!isHistoryUnchanged) {
+        historyTasks.value = nextHistoryTasks
+      }
+      hasFetchedHistorySnapshot.value = true
     } finally {
       // Only clear loading if this is the latest request.
       // A stale request completing (success or error) should not touch loading state
@@ -595,6 +605,7 @@ export const useQueueStore = defineStore('queue', () => {
     runningTasks,
     pendingTasks,
     historyTasks,
+    hasFetchedHistorySnapshot,
     maxHistoryItems,
     isLoading,