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/models/conversation_participants_spec.rb

@@ -0,0 +1,32 @@
+require 'rails_helper'
+
+RSpec.describe ConversationParticipant do
+  context 'with validations' do
+    it { is_expected.to validate_presence_of(:account_id) }
+    it { is_expected.to validate_presence_of(:conversation_id) }
+    it { is_expected.to validate_presence_of(:user_id) }
+  end
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:account) }
+    it { is_expected.to belong_to(:conversation) }
+    it { is_expected.to belong_to(:user) }
+  end
+
+  describe 'validations' do
+    it 'ensure account is present' do
+      conversation = create(:conversation)
+      conversation_participant = build(:conversation_participant, conversation: conversation, account_id: nil)
+      conversation_participant.valid?
+      expect(conversation_participant.account_id).to eq(conversation.account_id)
+    end
+
+    it 'throws error if inbox member does not belongs to account' do
+      conversation = create(:conversation)
+      user = create(:user, account: conversation.account)
+      participant = build(:conversation_participant, user: user, conversation: conversation)
+      expect { participant.save! }.to raise_error(ActiveRecord::RecordInvalid)
+      expect(participant.errors.messages[:user]).to eq(['must have inbox access'])
+    end
+  end
+end