calendar: model Our Lady's Saturday as a real occurrence outcome

On a free Saturday (nothing privileged already claims it, no active
octave), the day's own identity is now "Our Lady's Saturday" rather
than an anonymous ordinary-feria -- mirrors privileged-feria-minor
exactly, per direct instruction: Semiduplex-or-higher still wins
outright (Marian Saturday doesn't apply at all); below that (Simplex,
and Vigil, both under semiduplex on the FeastClass scale) loses and is
commemorated instead. Layered additively after decideOccurrence, same
shape as applyOctaves -- never touches decideOccurrence's own rules.

Needed a real winner identity (not just the plain temporal feria id)
so day-label/antiphon/collect sourcing can recognize it -- added a
temporal-feasts record purely for that, and taught getDayLabel to
check it for any named temporal winner (a small, free improvement for
Christmas/Pentecost's own labels too, previously unhandled).

hours: build the duplex-majus+ Lauds psalmody override (per-feast)

lauds-psalmody no longer unconditionally uses the plain weekday
default: a duplex-majus-or-higher sanctoral winner, or Our Lady's
Saturday (unconditional, no rank threshold -- it isn't competing with
the weekday default the way a saint is), now substitutes its own
proper psalm groups/antiphons/canticle. Per-feast, not per-Common, per
direct instruction, even though most duplex-majus+ saints across the
year don't have one authored yet and fall back to the plain weekday
default until they do.

Content for the worked example (St. Lawrence's own day) surfaced a
real bug while sourcing it: st-lawrence-antiphon.yml had been read
from the Roman/secular rite's own [Ant 1], not Monastic 1617's actual
Benedictus antiphon for that day -- corrected from a fresh live query.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/hours/lauds-psalmody-overrides.test.ts

@@ -0,0 +1,54 @@
+import { describe, expect, it } from 'vitest';
+import { resolveOrdo } from '../../src/hours';
+
+describe('Lauds psalmody override (duplex-majus+ sanctoral, and Marian Saturday)', () => {
+  it("substitutes St. Lawrence's own proper psalmody on his own day (Duplex II. classis, above the threshold)", () => {
+    const ordo = resolveOrdo('lauds', '2026-08-10');
+    const psalmNumbers = ordo.parts
+      .filter((p) => p.kind === 'psalm')
+      .map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
+    expect(psalmNumbers).toEqual([66, 92, 99, 62, 148, 149, 150]);
+
+    const ps92 = ordo.parts.find((p) => p.kind === 'psalm' && p.psalmNumber === 92);
+    expect(ps92?.kind === 'psalm' ? ps92.antiphon?.text.en : undefined).toContain('Lawrence went in to be a martyr');
+
+    const canticle = ordo.parts.find((p) => p.kind === 'canticle' && p.canticleId !== 'benedictus');
+    expect(canticle?.kind === 'canticle' ? canticle.canticleId : undefined).toBe('canticum-trium-puerorum');
+  });
+
+  it("doesn't override a saint below duplex-majus (e.g. Semiduplex) -- plain weekday psalmody still used", () => {
+    // 2026-09-19: St. Januarius, Semiduplex (below duplex-majus) -- see
+    // tests/calendar/marian-saturday.test.ts for confirming he wins
+    // outright as the day's winner despite it being a Saturday.
+    const ordo = resolveOrdo('lauds', '2026-09-19');
+    const psalmNumbers = ordo.parts
+      .filter((p) => p.kind === 'psalm')
+      .map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
+    // Saturday's own plain default (Ps 50 + 142), not the Common-shaped
+    // override -- no lauds-psalmody-overrides/st-januarius.yml exists.
+    expect(psalmNumbers).toEqual([66, 50, 142, 148, 149, 150]);
+  });
+
+  it("substitutes Our Lady's Saturday own proper psalmody, unconditionally, whenever it wins", () => {
+    const ordo = resolveOrdo('lauds', '2026-10-24'); // a clean, otherwise-empty Marian Saturday
+    const psalmNumbers = ordo.parts
+      .filter((p) => p.kind === 'psalm')
+      .map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
+    expect(psalmNumbers).toEqual([66, 92, 99, 62, 148, 149, 150]);
+
+    const ps92 = ordo.parts.find((p) => p.kind === 'psalm' && p.psalmNumber === 92);
+    expect(ps92?.kind === 'psalm' ? ps92.antiphon?.text.la : undefined).toContain('Dum esset Rex');
+
+    const benedictus = ordo.parts.find((p) => p.kind === 'canticle' && p.canticleId === 'benedictus');
+    expect(benedictus?.kind === 'canticle' ? benedictus.antiphon?.text.la : undefined).toContain('Beáta Dei Génitrix');
+
+    const collect = ordo.parts.find((p) => p.kind === 'prayer');
+    expect(collect?.kind === 'prayer' ? collect.text.text.en : undefined).toContain('glorious intercession of the Blessed Mary');
+  });
+
+  it("drops the Holy Cross and Blessed Virgin Mary suffrages on Our Lady's Saturday, keeping Apostles and Peace", () => {
+    const ordo = resolveOrdo('lauds', '2026-10-24');
+    const labels = ordo.parts.filter((p) => p.kind === 'preces' && p.label).map((p) => (p.kind === 'preces' ? p.label : undefined));
+    expect(labels).toEqual(['Of the Holy Apostles Peter and Paul', 'For Peace', 'Salve Regina']);
+  });
+});