Feat: Separate Subscription management and Upgrade options (#7419)

## Summary

Manage Subscription vs Upgrade Plan

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7419-Feat-Separate-Subscription-management-and-Upgrade-options-2c76d73d36508191a16dd3a25817826f)
by [Unito](https://www.unito.io)

tests-ui/tests/platform/cloud/subscription/components/SubscriptionPanel.test.ts

@@ -75,6 +75,14 @@ vi.mock(
   })
 )
 
+vi.mock('@/composables/auth/useFirebaseAuthActions', () => ({
+  useFirebaseAuthActions: vi.fn(() => ({
+    authActions: vi.fn(() => ({
+      accessBillingPortal: vi.fn()
+    }))
+  }))
+}))
+
 // Create i18n instance for testing
 const i18n = createI18n({
   legacy: false,