Slice 2: Guest Chat (Extends Slice 1)

## Overview Add guest-side chat capability. After this task, guests can participate in chat during remote support sessions. Depends on Slice 1 being complete. ## Verification (How to test after deployment) 1. Create remote support session as operator 2. Open guest link in incognito/different browser 3. Both operator and guest see chat panel 4. Operator sends message → guest sees it in real-time 5. Guest sends message → operator sees it in real-time 6. Guest can optionally enter name (stored in localStorage) ## Implementation Scope ### 1. Guest API Endpoints ```ruby # routes.rb - under guest namespace scope '/support/guest/:token' do get 'messages', to: 'remote_support_guest#messages' post 'messages', to: 'remote_support_guest#create_message' end ``` - `GET /support/guest/:token/messages` - fetch history - `POST /support/guest/:token/messages` - send message (body: { content, guest_name }) ### 2. ActionCable Guest Authentication Modify `ApplicationCable::Connection` to support guest tokens: ```ruby def connect self.current_user = find_verified_user || find_verified_guest end def find_verified_guest token = request.params[:guest_token] return nil if token.blank? session = SupportSession.find_by(guest_link_token: token) return nil unless session&.can_join? GuestIdentity.new(session: session, name: request.params[:guest_name]) end ``` Create `GuestIdentity` value object for connection identification. ### 3. Update Channel for Guests Modify `SupportSessionChatChannel`: - Accept subscription from either authenticated user or guest token - Reject if session ended/invalid ### 4. Guest UI Integration Modify `GuestKiosk.jsx`: - Import `SessionChatPanel` - Add collapsible chat to layout - Chat toggle button in footer - Store guest_name in localStorage - Subscribe via ActionCable with token ### 5. Translations Add to `app/javascript/i18n/guest/translations.js`: ```js guest: { chat: { title: 'Чат', placeholder: 'Введите сообщение...', send: 'Отправить', empty: 'Нет сообщений', name_prompt: 'Ваше имя (необязательно)', connection_error: 'Ошибка подключения к чату' } } ``` Add translations for all 6 languages. ### 6. Frontend ActionCable Consumer Create guest-compatible ActionCable consumer: ```js // app/javascript/services/support_session_chat_consumer.js import { createConsumer } from '@rails/actioncable' export function createGuestChatConsumer(token, guestName) { return createConsumer(`/cable?guest_token=${token}&guest_name=${encodeURIComponent(guestName)}`) } ``` ## Files to Create - `app/javascript/services/support_session_chat_consumer.js` - `app/models/guest_identity.rb` (value object) - `spec/requests/remote_support_guest_chat_spec.rb` - `spec/channels/support_session_chat_channel_guest_spec.rb` ## Files to Modify - `config/routes.rb` - `app/controllers/remote_support_guest_controller.rb` - `app/channels/application_cable/connection.rb` - `app/channels/support_session_chat_channel.rb` - `app/javascript/components/remote_support/GuestKiosk.jsx` - `app/javascript/components/remote_support/SessionChatPanel.jsx` (guest mode) - `app/javascript/i18n/guest/translations.js`