ROOT CAUSE: .navigationTransition(.zoom) + .matchedTransitionSource
in a paged TabView. When navigating back, the zoom tries to animate
to the source card, but the TabView may have recycled/repositioned
the page. The animation targets a stale frame, causing the card to
flash black or disappear.
FIX: Removed .zoom transitions and .matchedTransitionSource from
both UpcomingTripsPageView and PastTripsSection. Standard push/pop
navigation is stable with paged TabViews.
Also removed all debug logging.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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