Build on top of v1.8.3-beta.7.
- CoverFlow stage now uses CSS grid with place-items center. All five cards stack in the same grid cell, the grid centres each one. z-index drives the visual stacking. Removes the translate(-50%, -50%) centring transform from every card, so the FRONT card lives without any transform (sharp), and SIDE cards transform from the grid centre via translateX + scale + rotateY (3D fan).
- The animation fix from beta.7 (top/right/bottom/left + margin auto) was abandoned because it left orphan positioning properties when the .dash-cf-card-front class moved between cards. The grid approach is clean: each card always uses grid-area 1/1 regardless of the active state, only the transform changes.
- Chart grow transition slowed from 600 ms to 1100 ms cubic-bezier(0.22, 1, 0.36, 1) so the curves rise more deliberately.
Note: a follow-up will look at the timeline + tooltip blur the user reports on the main card (not just the dashboard).