* Max-zoom clamp: `MIN_VISIBLE_WORLD_AT_MAX_ZOOM = 5` world units on
the longest viewport axis. Tuned against the owner's
debug-overlay readings — mobile longest ≈ 412 px clamps at
scale ≈ 82, desktop longest ≈ 1200 px clamps at scale ≈ 240.
Same formula adapts to both shapes automatically; no separate
mobile / desktop branch.
* Planet-names toggle no longer rebuilds every Pixi.Text on a flip.
When `setPlanetLabels` sees the same planet set (which is the
common case — only the `name` lines toggling on / off), it walks
the live label containers and just retunes text content +
visibility instead of destroying and recreating 9 × N Text
instances. A 500-planet map flips the toggle inside a frame now.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Ilia Denisov
f4670c1831