Adds TransformControls for dragging nodes in the 3D scene, a room dimension
editor (width/depth/height), a GDOP (Geometric Dilution of Precision) coverage
overlay on the ground plane that updates in real-time during node drag, virtual
node support for planning optimal placement before hardware purchase, and REST
API integration to persist positions and room config to the mothership.
Backend adds PUT /api/nodes/{mac}/position, POST /api/nodes/virtual,
DELETE /api/nodes/{mac}, PUT /api/room endpoints. Also wires OTA status
handler and improves firmware manifest to use actual latest binary filename.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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