feat(mockup): add OpenAI Codex (gpt-5.6-sol + built-in image_gen) raster mockup generator

docker-compose.yml

@@ -7,6 +7,7 @@ services:
     restart: unless-stopped
     volumes:
       - /home/chrisf/docker/appdata/sparkvault/data:/app/store
+      - /home/chrisf/.codex:/root/.codex
     networks:
       - t3_proxy
     ports: