When a card slides to a foundation slot already occupied, both card entities
share the same x,y for the duration of the tween. With STACK_FAN_FRAC only
0.003 apart, the incoming card partially occludes the stationary one, making
the two exposed corners look like a single mismatched card.
Elevate every CardAnim-driven card to target.z + 50 during transit so it
fully occludes any card resting at the destination. On completion the card
snaps to the correct resting z. The value sits below DRAG_Z (500) so dragged
cards still render above animated ones.
Closes #implicitly-related-to-corner-mismatch-investigation
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300
c66ff26d1d