[backport cloud/1.37] Workspaces 3 create a workspace (#8221) (#8252)

## Summary
- Backport of #8221 to cloud/1.37
- Cherry-picked commit a08ccb55c1 with
conflict resolution

## Conflicts resolved
- `src/components/dialog/GlobalDialog.vue`: Added workspace mode CSS
styling from PR
- `src/platform/cloud/subscription/components/SubscriptionPanel.vue`:
Accepted PR refactoring to use conditional workspace components

🤖 Generated with [Claude Code](https://claude.ai/code)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8252-backport-cloud-1-37-Workspaces-3-create-a-workspace-8221-2f06d73d365081e1a38ed4492a7bc6a8)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: GitHub Action <action@github.com>

src/stores/firebaseAuthStore.ts

@@ -512,6 +512,7 @@ export const useFirebaseAuthStore = defineStore('firebaseAuth', () => {
     sendPasswordReset,
     updatePassword: _updatePassword,
     deleteAccount: _deleteAccount,
-    getAuthHeader
+    getAuthHeader,
+    getFirebaseAuthHeader
   }
 })