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An Excalidraw prototyping tab for dsh-better-sidebar with structured product clarification, conflict-aware human and Agent board updates, and prototype-guided frontend generation.

PBR 3D model preview for game art: GLB/GLTF with textures, IBL environment lighting, orbit controls, and a material channel inspector (baseColor/normal/roughness/metallic/AO/emissive/wireframe); scalar channels shown as grayscale per PBR spec, via the pbr3d fence and pbr_render tool.