feat: Add apps sidebar tab (#9342)

## Summary

<!-- One sentence describing what changed and why. -->

## Changes

- **What**: <!-- Core functionality added/modified -->
- **Breaking**: <!-- Any breaking changes (if none, remove this line)
-->
- **Dependencies**: <!-- New dependencies (if none, remove this line)
-->

## Review Focus

<!-- Critical design decisions or edge cases that need attention -->

<!-- If this PR fixes an issue, uncomment and update the line below -->
<!-- Fixes #ISSUE_NUMBER -->

## Screenshots (if applicable)

<img width="383" height="359" alt="image"
src="https://github.com/user-attachments/assets/47905196-9db6-4a57-8cf7-384d4d37d000"
/>

<img width="335" height="281" alt="image"
src="https://github.com/user-attachments/assets/843068f3-e895-4781-bf5f-e0eb86d3387c"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9342-feat-Add-apps-sidebar-tab-3176d73d3650812b822fc9cc3f17322e)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/views/GraphView.vue

@@ -113,6 +113,12 @@ const graphCanvasContainerRef = ref<HTMLDivElement | null>(null)
 const { isBuilderMode } = useAppMode()
 const { linearMode } = storeToRefs(useCanvasStore())
 
+watch(linearMode, (isLinear) => {
+  if (isLinear) {
+    useSidebarTabStore().activeSidebarTabId = null
+  }
+})
+
 const telemetry = useTelemetry()
 const firebaseAuthStore = useFirebaseAuthStore()
 let hasTrackedLogin = false