Cloud/gate topup on subscription (#6399)

## Summary

Gate the Top up buttons in the user dropdown and credits page of the
settings.


┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6399-Cloud-gate-topup-on-subscription-29c6d73d36508127866cdcbcfda66c46)
by [Unito](https://www.unito.io)

---------

Co-authored-by: DrJKL <DrJKL0424@gmail.com>

src/components/dialog/content/setting/CreditsPanel.vue

@@ -15,7 +15,7 @@
           <UserCredit text-class="text-3xl font-bold" />
           <Skeleton v-if="loading" width="2rem" height="2rem" />
           <Button
-            v-else
+            v-else-if="isActiveSubscription"
             :label="$t('credits.purchaseCredits')"
             :loading="loading"
             @click="handlePurchaseCreditsClick"
@@ -123,6 +123,7 @@ import { computed, ref, watch } from 'vue'
 import UserCredit from '@/components/common/UserCredit.vue'
 import UsageLogsTable from '@/components/dialog/content/setting/UsageLogsTable.vue'
 import { useFirebaseAuthActions } from '@/composables/auth/useFirebaseAuthActions'
+import { useSubscription } from '@/platform/cloud/subscription/composables/useSubscription'
 import { useDialogService } from '@/services/dialogService'
 import { useCommandStore } from '@/stores/commandStore'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
@@ -139,6 +140,7 @@ const dialogService = useDialogService()
 const authStore = useFirebaseAuthStore()
 const authActions = useFirebaseAuthActions()
 const commandStore = useCommandStore()
+const { isActiveSubscription } = useSubscription()
 const loading = computed(() => authStore.loading)
 const balanceLoading = computed(() => authStore.isFetchingBalance)