Glb components and templates

A deeply technical 65-percent keyboard story that keeps one WebGPU product model present through construction layers, switch travel, key groups, topology, section cut, anodised finishes, acoustics, typing angle, and reservation. One owner-requested interaction revision sits over the supplied export: the key under the cursor clicks and springs back, the camera keeps a slow idle orbit under every chapter, and each anodised finish reads as a lit cap set with a seated accent keycap.