Reported leak: when a new game starts, every card sprite tweens from
its previous-game Transform to its new dealt position. A careful
observer can track those origin points and deduce face-down cards in
the new layout — the tween's start frame literally renders the prior
game's geometry.
Fix: in handle_new_game, after replacing the GameState, snap every
existing card Transform to the stock pile's position before writing
StateChangedEvent. The downstream slide tween in card_plugin then
reads the stock position as its source, so all 52 cards animate out
from a single point — reads as "dealing from the deck" with no
information leak.
No layout reach in headless test contexts so the snap is gated on
Option<Res<LayoutResource>>.
Reported by Quat.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
funman300
3eabc149a8