Per on-device review, render the week number as a full-height tonal pill
mirroring the day cells' geometry (secondaryContainer tint, same rounded
shape and gap), with the number centred — so the gutter reads as part of the
grid rather than a floating chip. This diverges from the Week view's small
header chip, so revert the shared-badge extraction: restore WeekScreen's
private badge and drop ui/common/WeekNumberBadge.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jean-Luc Makiola
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