Date field

Rules

• "Today" and "Yesterday", then "Pick a date". For dates still to come (a bill's next due date, a payday) the second choice is "Tomorrow".
• The calendar is our own component in the design tokens, not the browser's pop-up: keyboard accessible, weeks start on Sunday, today in text-accent, the chosen day in surface-accent.
• On wide screens the entry row shows a compact date button ("Today") that opens the same choices.