The assertion that adding to compare does not reset the carousel failed on
staging: 537 → 2. The app was not at fault. Playwright scrolls a target into
view before clicking, and the test clicked the FIRST card's button after
paging the row to the end — so Playwright scrolled the container back to the
start, and the assertion measured that.
Reproduced on a static page with no React on it: a snap scroller at 615,
Playwright clicks the off-screen first card, scrollLeft becomes 2. Scroll-snap
was ruled out first — mandatory, proximity and no-snap all behave identically
when the button mutates in place.
Now clicks the last card's button, which is visible at the end of the travel,
and allows a few pixels for snap and sub-pixel adjustment while still failing
on a reset to the start. The property was never actually under test before;
it is now.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
