Fix CORS and API URLs for container communication

docker-compose-frontend-expose.yml

@@ -34,7 +34,8 @@ services:
       CONFIG_DIR: /config
       LISTEN_ADDR: "0.0.0.0:${WIZARD_PORT:-8080}"
       MAX_BACKUPS: "5"
-      CORS_ORIGINS: http://127.0.0.1:${FRONTEND_PORT:-3000},http://localhost:${FRONTEND_PORT:-3000}
+      # Allow frontend (container network) and localhost for testing
+      CORS_ORIGINS: http://frontend:${FRONTEND_PORT:-3000},http://127.0.0.1:${FRONTEND_PORT:-3000},http://localhost:${FRONTEND_PORT:-3000}
     ports:
       - "127.0.0.1:${WIZARD_PORT:-8080}:${WIZARD_PORT:-8080}"
     networks:
@@ -74,7 +75,8 @@ services:
     container_name: harborforge-test-frontend
     restart: "no"
     environment:
-      VITE_API_BASE_URL: http://127.0.0.1:${BACKEND_PORT:-8000}
+      # Use internal service name for backend API
+      VITE_API_BASE_URL: http://backend:${BACKEND_PORT:-8000}
     ports:
       - "127.0.0.1:${FRONTEND_PORT:-3000}:${FRONTEND_PORT:-3000}"
     depends_on: