KeelrLeek
56036216f8
The transitioned track translateY collapsed to 0 in Chromium (percent- translated zero-height track), leaving the active cover one stride low per step. The track is now a fixed anchor at the reel centre; each card positions itself at (index - activeIndex) * stride and animates its own small `top`, so no coordinate ever exceeds +/-RENDER_RADIUS * stride. Verified with the transition ON: centre offset 0 at every index in the 12- and 500-item fixtures, 5 cards in the DOM at scale, wheel gates, dialog semantics, Tab containment, focus restore, and polite announce all pass. Dev window.__preview*/__ui handles removed from App.svelte.