Replaces the figment/segment/Forge stack with a single ComfyUI backend fronted by Open WebUI's native ComfyUI integration. ComfyUI is built from the official manual install for NVIDIA. Ships txt2img and img2img workflow templates plus matching node-mapping JSONs that paste into Open WebUI's admin panel. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>