Replace the base scaffolds with the real Material 3 Expressive UI on the
existing M1 ViewModels.
Task list: due-date section headers (collapsible Completed), grouped tonal
rows with a list-colour accent bar, swipe-to-complete / -delete, inline add,
list-name chip and subtask "done/total" chip in mixed views (children folded
into their parent). New pure TaskSections grouping + unit test.
Detail: each fact its own tonal card with a leading icon (Calendula pattern) —
when/list/priority/progress/description; progress shows only with subtasks.
Subtasks are a connected grouped run whose first segment is the expand toggle,
with an accent-tinted inline add row; completed subtasks sink to the bottom.
Edit: title, description, list dropdown, start/due date-time + all-day,
priority segmented buttons, reminder offset, validation; IME auto-scroll.
Extract GroupedSurface from GroupedRow so the connected-row look is reusable
at any width; add ListNameChip + date-time format/picker helpers.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jean-Luc Makiola
a19b1373a4