Import the Annunciation's own proper Lauds/Vespers content

Live-verified against Divinum Officium (Monastic Tridentinum 1617),
2026-03-25 (fixed date, always winnable). Own chapter (Isa 7:14-15,
"Ecce virgo concípiet") and own versicle ("Ave, María, grátia plena")
at both hours, own Vespers responsory ("Ángelus Dómini * Nuntiávit
Maríæ," the opening of the Angelus). Lauds responsory and both hours'
hymns turn out byte-identical to Common-of-the-BVM's own already-
authored content -- reused verbatim.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014axryJBrRswYh2niA7WCUc

tests/hours/lauds.test.ts

@@ -340,6 +340,17 @@ describe('resolveOrdo("lauds", ...)', () => {
     expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('Jesu, coróna Vírginum');
   });
 
+  it("resolves the Annunciation's own proper chapter, with Common-of-the-BVM's hymn", () => {
+    // Live-verified against Divinum Officium (Monastic Tridentinum
+    // 1617), 2026-03-25 (fixed date, always winnable). See lauds-
+    // capitulum-annunciation.yml's header.
+    const ordo = resolveOrdo('lauds', '2026-03-25');
+    const chapter = ordo.parts.find((p) => p.kind === 'chapter');
+    expect(chapter?.kind === 'chapter' ? chapter.text.citation?.en : undefined).toBe('Isa 7:14-15');
+    const hymn = ordo.parts.find((p) => p.kind === 'hymn');
+    expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('O gloriósa Dómina');
+  });
+
   it('includes the Kyrie + Our Father lead-in right after the Benedictus, before the day collect (either form)', () => {
     const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
     const litanyIndex = ordo.parts.findIndex((p) => p.kind === 'preces' && p.text.text.la?.includes('Kýrie, eléison'));