**Date library reorganisation** (no new third-party dependency)
- New `src/lib/util/dias/` with `_vendor/` (Adobe Apache 2.0 vendored code,
ATTRIBUTION.md preserved) and a public facade split into `types`,
`values`, `calendars`, `queries`, `operations`, `parse`, `format`,
`index`. Consumers import only from `$lib/util/dias`.
- All date-related `Intl` consolidated in `dias/format.ts` —
`DateFormatter`, cache, `resolveDateOrder`, `resolveHourCycle`,
placeholders, defaults.
- `ext/dates` now a thin reactive wrapper delegating to `dias`.
- Aligned App-layer `HourCycle` to canonical numeric form `12 | 24`
(matches `Intl.DateTimeFormat`'s `hour12`). Removed string form
`'12h' | '24h'` from `ext/app/types`, `ext/dates`,
`ext/presentation/locale-defaults`, and their tests.
- Repointed every consumer: `soma/external/dates`,
`terra/external/dates`, eight `routes/test/*` pages.
- Legacy `src/lib/util/dates/` left untouched by request.
**Tier 3 components**
- `soma/components/calendar/` — 14 parts, single + multiple selection,
`MonthSelect`/`YearSelect`, ISO/simple week numbers,
`isDateHoliday` matcher, `data-weekend` flag, navigation live-
region, RTL flip, full ARIA, 27-item checklist verified.
- `soma/components/range-calendar/` — 14 parts, range selection with
live hover preview (novel vs ark/bits/radix/react-aria), `minDays`
/ `maxDays` / `allowSingleDay`, third-click deselects only the
clicked endpoint.
- Test pages at `/test/soma/calendar` and `/test/soma/range-calendar`
with seven demos each. Links added to the soma index under a new
"Dates" section.
- READMEs with anatomy, parts, props, ARIA, keyboard, data-attrs, and
a competitive comparison table.
**Command fixes**
- Resolved O(N^2) reactive cascade: introduced
`visibleSet: $derived<Set<string>>` on the root provider;
per-item `isVisible` is now an O(1) `has()` lookup instead of
calling back into the provider, which was re-running all items'
derivations on every `itemsVersion` bump.
- Added `dir` prop with fallback to `soma.presentation.getDir()`;
horizontal arrows flip in RTL via `getDirectionalKeys`; root
receives `dir` attribute.
**Doc updates (session outcomes)**
- `CLAUDE.md`: replaced obsolete `@/glob/lib` date references with
`$lib/util/dias`; added canonical date-layer section; reinforced
`Provider` export rule and `data-{component}[-{part}]` naming
(never `data-soma-*`); clarified translation convention.
- `src/uix/soma/COMPONENT_GUIDE.md`: new checklist items 26
(component README required) and 27 (grep for data-attr
consistency); new Common Mistakes 11 (`data-soma-*` prefix), 12
(wrong date module), 13 (string `HourCycle`).
- `src/uix/soma/SOMA_ARCHITECTURE.md`: clarified data-attr naming
(canonical emitter is `createAttrs`; validator checks enum
values only, not names); new section covering date types and
formatting through `$soma/external/dates` → `$lib/util/dias`;
documented numeric `HourCycle`.
**Infrastructure**
- `PrimitiveHeaderAttributes` and `PrimitiveSelectAttributes` added
to `$soma/types`.
- `getLastFirstDayOfWeek`, `getNextLastDayOfWeek` re-exported from
`$soma/external/dates`.
- `calendar.*` and `range-calendar.*` translation blocks added to
`$soma/core/langs.ts`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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