User correctly pointed out: the input segments depend on the kind of
calendar — they're *derived* values, not independently controlled.
Filtering segments in the demo snippet (commit A) was wrong; the
derivation belongs in the DateField provider.
This commit refactors the contract + lands the year/month-grid views
(combining commit B + C into one).
Architecture fix (segments derive from kind):
- DateFieldProvider opts gain `kind: 'date' | 'month' | 'year'`.
- `segmentContents` filters `allSegmentContent.arr` by a derived
`visibleDatePartsByKind` set, collapsing runs of literals and
trimming leading/trailing separators. Time segments (hour/minute/
second/dayPeriod) are passed through untouched — `kind` is
orthogonal to `granularity`.
- DateField root component accepts `kind` prop and threads it.
- DatePicker root forwards its `kind` to the DateField provider it
creates internally.
- DateRangeField passes `kind: 'date'` as a constant for now; range
propagation lands in commit D.
- Test fixtures extended with the new opt.
New Eidos parts (commit B + C in one shot):
- `<DatePicker.YearView>`: 3×4 decade grid centred on placeholder's
decade boundary. Header shows the decade range with prev/next
decade buttons. Click on a year sets value to (year, 1, 1) and
calls handleDateSelect (closes if closeOnDateSelect=true inline).
- `<DatePicker.MonthView>`: 3×4 month grid for the placeholder's
year. Localised month names via DateFormatter. Header shows the
year with prev/next year buttons. Click sets (year, month, 1).
- CSS for both: shared 3-column grid layout, hover surface-overlay
background, selected cell uses primary-solid + content-on-solid.
focus-visible outline. prefers-reduced-motion honoured.
Demo wiring:
- Removed the local `filterByKind` helper — soma derives it now.
- The snippet just iterates `segments` as it comes.
- The popover content branches on `kind`: Calendar for 'date',
MonthView for 'month', YearView for 'year'. The Footer renders in
all three branches.
- An $effect re-opens the popover whenever `kind` changes (clicking
the chip outside the popover would otherwise close it in inline
mode).
What this commit DOES NOT do (commit D):
- Propagate `kind` to date-range-picker (start + end inputs + the
range-calendar popover view-mode).
- date-range-field consumes `kind: 'date'` only for now.
Verification: 0 type errors, 11/11 date-field + date-picker tests,
67/67 component:audit PASS. Browser confirmed:
- kind=date → MM/DD/YYYY input + day calendar
- kind=month → MM/YYYY input + month grid (2026)
- kind=year → YYYY input + year grid (2020 – 2031)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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