Add an opt-in left gutter to the Month grid showing the ISO calendar-week
number, gated by a new "Week numbers" display setting (default off). The
number is computed on each row's first day — the same basis as the Week
view's badge — so the two views agree, and rendered as a low-emphasis
onSurfaceVariant label so it recedes across all six rows rather than
competing with the event bars. The weekday header reserves a matching
gutter so the day columns stay aligned.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jean-Luc Makiola
a514b8b506