Refactor Site Builder Integration and Update Component Structure

- Removed the separate `igny8_sites` service from Docker Compose, integrating its functionality into the main app.
- Updated the Site Builder components to enhance user experience, including improved loading states and error handling.
- Refactored routing and navigation in the Site Builder Wizard and Preview components for better clarity and usability.
- Adjusted test files to reflect changes in import paths and ensure compatibility with the new structure.

docker-compose.app.yml

@@ -101,28 +101,6 @@ services:
       - "com.docker.compose.project=igny8-app"
       - "com.docker.compose.service=igny8_marketing_dev"
 
-  igny8_sites:
-    # Sites container: Public site renderer + Site Builder (merged)
-    # Build separately: docker build -t igny8-sites-dev:latest -f Dockerfile.dev .
-    image: igny8-sites-dev:latest
-    container_name: igny8_sites
-    restart: always
-    ports:
-      - "0.0.0.0:8024:5176"  # Sites renderer + Builder dev server port
-    environment:
-      VITE_API_URL: "https://api.igny8.com/api"
-      SITES_DATA_PATH: "/sites"
-    volumes:
-      - /data/app/igny8/sites:/app:rw
-      - /data/app/sites-data:/sites:ro
-      - /data/app/igny8/frontend:/frontend:ro
-    depends_on:
-      igny8_backend:
-        condition: service_healthy
-    networks: [igny8_net]
-    labels:
-      - "com.docker.compose.project=igny8-app"
-      - "com.docker.compose.service=igny8_sites"
 
   igny8_celery_worker:
     image: igny8-backend:latest