Initial commit: Add logistics and order_detail message types

- Add Logistics component with progress tracking
- Add OrderDetail component for order information
- Support data-driven steps and actions
- Add blue color scale to widget SCSS
- Fix node overflow and progress bar rendering issues
- Add English translations for dashboard components

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

spec/controllers/api/v1/accounts/actions/contact_merges_controller_spec.rb

@@ -0,0 +1,41 @@
+require 'rails_helper'
+
+RSpec.describe 'Contact Merge Action API', type: :request do
+  let(:account) { create(:account) }
+  let!(:base_contact) { create(:contact, account: account) }
+  let!(:mergee_contact) { create(:contact, account: account) }
+
+  describe 'POST /api/v1/accounts/{account.id}/actions/contact_merge' do
+    context 'when it is an unauthenticated user' do
+      it 'returns unauthorized' do
+        post "/api/v1/accounts/#{account.id}/actions/contact_merge"
+
+        expect(response).to have_http_status(:unauthorized)
+      end
+    end
+
+    context 'when it is an authenticated user' do
+      let(:agent) { create(:user, account: account, role: :agent) }
+      let(:merge_action) { double }
+
+      before do
+        allow(ContactMergeAction).to receive(:new).and_return(merge_action)
+        allow(merge_action).to receive(:perform)
+      end
+
+      it 'merges two contacts by calling contact merge action' do
+        post "/api/v1/accounts/#{account.id}/actions/contact_merge",
+             params: { base_contact_id: base_contact.id, mergee_contact_id: mergee_contact.id },
+             headers: agent.create_new_auth_token,
+             as: :json
+
+        expect(response).to have_http_status(:success)
+        json_response = response.parsed_body
+        expect(json_response['id']).to eq(base_contact.id)
+        expected_params = { account: account, base_contact: base_contact, mergee_contact: mergee_contact }
+        expect(ContactMergeAction).to have_received(:new).with(expected_params)
+        expect(merge_action).to have_received(:perform)
+      end
+    end
+  end
+end