feat: improve captain overview loading and reuse stats for summary [CW-7610] (#15105)

spec/enterprise/controllers/api/v1/accounts/captain/assistants_controller_spec.rb

@@ -257,10 +257,20 @@ RSpec.describe 'Api::V1::Accounts::Captain::Assistants', type: :request do
     let(:alice) { create(:user, account: account, role: :administrator, name: 'Alice Adams') }
     let(:bob) { create(:user, account: account, role: :administrator, name: 'Bob Brown') }
     let(:summary_service) { instance_double(Captain::OverviewSummaryService) }
+    let(:summary_stats) do
+      {
+        conversations_handled: { current: 42 },
+        hours_saved: { current: 12 },
+        auto_resolution_rate: { current: 65.0, trend: 5.0 },
+        handoff_rate: { current: 20.0, trend: -2.0 },
+        reopen_rate: { current: 5.0, trend: -1.0 },
+        knowledge: { coverage: 80, approved: 8, documents: 3 }
+      }
+    end
 
     def get_summary(user)
       get "/api/v1/accounts/#{account.id}/captain/assistants/#{assistant.id}/summary",
-          params: { range: '30' },
+          params: { range: '30', stats: summary_stats },
           headers: user.create_new_auth_token,
           as: :json
     end
@@ -273,6 +283,7 @@ RSpec.describe 'Api::V1::Accounts::Captain::Assistants', type: :request do
 
     it 'caches the summary per viewer so one user never receives another user\'s greeting' do
       allow(summary_service).to receive(:perform).and_return({ message: 'Hi Alice' })
+      expect(Captain::AssistantStatsBuilder).not_to receive(:new)
 
       get_summary(alice)
       get_summary(alice) # served from Alice's cache, no regeneration
@@ -280,6 +291,7 @@ RSpec.describe 'Api::V1::Accounts::Captain::Assistants', type: :request do
 
       expect(response).to have_http_status(:success)
       expect(Captain::OverviewSummaryService).to have_received(:new).twice
+      expect(Captain::OverviewSummaryService).to have_received(:new).with(hash_including(stats: summary_stats)).twice
     end
 
     it 'does not cache failures so a transient error is retried' do