refactor: simplify setup wizard completion spec by removing unnecessary user login and redirect follow

Author: rsmithlal

spec/requests/better_together/wizard_completion_spec.rb

@@ -2,21 +2,18 @@
 
 require 'rails_helper'
 
-RSpec.describe 'Setup Wizard completion', type: :request do
-  let!(:platform) { create(:better_together_platform, :host, privacy: 'private') }
+RSpec.describe 'Setup Wizard completion' do
   let!(:wizard) { BetterTogether::Wizard.find_by!(identifier: 'host_setup') }
-  let!(:user) { create(:better_together_user, :confirmed, :platform_manager) }
 
   before do
     wizard.mark_completed
-    login_as(user, scope: :user)
   end
 
   it 'redirects to the success path with notice preserved' do
     get better_together.setup_wizard_path(locale: I18n.locale)
     expect(response).to redirect_to(wizard.success_path)
 
-    follow_redirect!
-    expect(response.body).to include(wizard.success_message)
+    # The controller preserves the notice in the flash; assert it directly
+    expect(flash[:notice]).to eq(wizard.success_message)
   end
 end