* Planet size formula moves to pixel-space:
`pointRadiusBasePx = 2 + 2 * cbrt(size / SIZE_NORMALIZER)`. The
on-screen disc now reads ~4-7 px at the reference zoom regardless
of how large the world rectangle is — the previous `world-units`
formulation blew up on small maps and made Source-class planets
swallow their neighbours.
* Labels + outlines live in the origin copy only. The 9× replication
across torus copies was the dominant cost on a 100+ planet map
(Pixi.Text creation + Graphics rebuilds on every zoom step); the
origin-copy layout is what the camera-wrap listener guarantees
the user actually sees.
* `setPlanetLabels` and `setPlanetOutlines` skip Pixi-object
rebuilds when the input fingerprint is unchanged — toggle flips
and selection changes now keep the existing Text / Graphics
instances alive and only repaint the affected pieces.
* `renderer.md` updated to the new contract.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Ilia Denisov
6996a79286