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>
The calendar picker was an AlertDialog holding a non-scrolling Column, so
accounts with many calendars overflowed the dialog's fixed height and the
entries past ~9 were unreachable (Codeberg #29).
Replace it with the app's FullScreenPicker (collapsing scaffold + scrollable
content), rendering calendars as connected GroupedRows grouped under their
owning account — the same grouping the visibility filter and calendar manager
use — with a colour chip per row and a check on the current selection.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
