test(onboarding): fix inbox channel dialog spec (#15048)

Restores the Inbox Channels dialog’s Facebook-gating test coverage by
isolating account feature dependencies that are unrelated to these
cases. This keeps the onboarding checks focused on whether Facebook is
configured and avoids initializing router and account-store state.

Co-authored-by: Muhsin <12408980+muhsin-k@users.noreply.github.com>

app/javascript/dashboard/routes/dashboard/onboarding/specs/inbox-setup/InboxChannelsDialog.spec.js

@@ -6,6 +6,9 @@ vi.mock('vue-i18n', () => ({ useI18n: () => ({ t: key => key }) }));
 vi.mock('dashboard/composables/store', () => ({
   useMapGetter: () => ({ value: {} }),
 }));
+vi.mock('dashboard/composables/useAccount', () => ({
+  useAccount: () => ({ isCloudFeatureEnabled: () => false }),
+}));
 vi.mock('../../inbox-setup/useChannelConnect', () => ({
   useChannelConnect: () => ({
     connectViaOAuth: vi.fn(),