Replaces the SVG schematic on /eme with a textured WebGL scene: NASA
Blue Marble Earth, real-size Moon, outbound beam, dashed return ray
to the sub-lunar point, and a red shading on the anti-moon hemisphere
that marks who can't see the Moon (outside the bounce footprint).
Three.js (~680 kB) now lives in its own chunk; esbuild --splitting
keeps it out of the main bundle so it only loads when a user hits
/eme. Main app.js drops from 1.6 MB to 922 kB.
Also swaps the Elevation/SNR rows so the badge comes before the number.
