Full-screen selection pickers opened with the LargeTopAppBar expanded, so the
title started below the bar and only settled into it after a scroll — a tall
empty header above a short option list. Give CollapsingScaffold a largeTopBar
flag and have FullScreenPicker use a pinned single-line TopAppBar, so every
picker (calendar, theme, week start, language, reminder, agenda range) shows
its title in the bar from the start. Settings and the calendar manager keep
the large collapsing header.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Jean-Luc Makiola
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