Completes the kind contract for the range picker. The popover used to
render the day-grid range calendar regardless of kind; now it switches
to a year-grid or month-grid view that handles range selection on the
appropriate granularity.
New Eidos parts:
- <DateRangePicker.YearView>: 3×4 decade grid with prev/next decade
buttons. Selection state machine (mirrors the day-grid range
selection):
* empty → click sets startValue (and clears endValue)
* pending (start set, no end) → click sets endValue. Swap if the
clicked year is before the existing start.
* complete (both set) → click resets to a fresh start + clears end.
Year endpoints normalise to Jan 1 (start) / Dec 31 (end).
- <DateRangePicker.MonthView>: 3×4 month grid for the placeholder's
year, with prev/next year navigation. Same state machine using
`year*12 + month` as the comparison key, so ranges span multi-year
boundaries cleanly. Start = day 1; end = last day of the month
(computed via Date(y, m, 0).getDate()).
- Localised month names via DateFormatter(locale, { month: 'short' }).
Index + CSS:
- index.ts: registers YearView + MonthView on the DateRangePicker
namespace.
- date-range-picker.css: shared grid layout (3 columns, gap-2),
hover surface-overlay, selected cells get primary-solid +
content-on-solid, in-range cells get color-mix(primary-solid 22%,
transparent) as a stripe with border-radius:0 (start/end keep
their outer corner radius). Reduced-motion respected.
Demo:
- {#if kind === 'year'} → <YearView>; {:else if 'month'} → <MonthView>;
{:else} → existing day calendar.
- pickerFooter snippet rendered once at the Content level (removed
the inline render at the end of calendarBody to avoid duplication).
Verified in browser:
1. kind='year' chip → popover shows year grid '2020 – 2031'.
2. Click 2024 → cell marked start (purple solid).
3. Click 2027 → cell marked end, 2025-2026 marked in-range. trace
shows 'range 2024-01-01 -> 2027-12-31'. Popover stays open
(closeOnRangeSelect=false in the demo).
0 type errors, 67/67 component:audit PASS.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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