Add comprehensive Fresnel zone ellipsoid visualization for all active links
in the 3D scene. Provides developers with real-time feedback on link
coverage geometry and detection quality.
Features:
- FresnelEllipsoid() helper function in dashboard/js/fresnel.js for shared
ellipsoid geometry computation (used by both debug and explainability)
- Wireframe + fill material rendering for clear ellipsoid visualization
- Debug layer toggle in node panel (expert mode only)
- Hover interaction with tooltip showing link details (distance, wavelength,
Fresnel radius, health score)
- Click interaction to select corresponding link in sidebar
- Mobile viewport optimization (reduced segment count for performance)
- Comprehensive test coverage for ellipsoid geometry computation
The first Fresnel zone ellipsoid represents the region where point
reflectors have maximum impact on CSI phase. Visualizing these zones
helps system tuners understand why localisation places blobs in specific
positions and identify coverage gaps.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
