Prime: real content (psalms, Martyrology, Regula) and ordo corrections

Pulls in verified content from Divinum Officium rather than placeholders:
17 psalms (2, 6, 7-19, 118, 129), 365 days of the Martyrology, and the full
121-reading Regula cycle, plus the Athanasian Creed.

Ordo corrections driven by review against the real engine output:
- Capitulum and Preces now pick a Sunday/feast vs. ferial form
  (calendar/isSundayOrFeast); ferial Preces said every ferial day by choice.
- Chapter responsory, hymn doxology, and the opening versicle's
  Alleluia/Laus tibi all vary by season via a shared resolver
  (hours/seasonal-propers.ts).
- Real Roman Kalends/Nones/Ides Latin dating (calendar/roman-date.ts,
  verified against 363/365 real Martyrology headings) plus the historical
  "bis sextus" Feb 29 handling, and the Martyrology's Luna (moon-day)
  heading (a ported Golden-Number calculation).
- Fixed responsory structure (was missing its initial full repeat),
  weekday psalm antiphons (opening as incipit-or-full by rank, full
  repeat after the psalms/Creed as its own part, "*" chant mark kept),
  scripture citations on the capitulum/lectio brevis, and V./R. markers
  switched from Unicode symbols to plain text for reliable font rendering.
- Dropped Pretiosa and the dead-commemoration psalm (129) for time;
  trimmed section headings down to the ones that are actually named
  things (Preces, Chapter Office, etc. no longer relabel connective text).

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

src/martyrology/index.ts

@@ -0,0 +1,78 @@
+import type { MartyrologyEntry } from './types';
+import { lunaDay, lunaOrdinalLatin, lunaOrdinalEnglish } from './luna';
+import { romanDateLatin } from '../calendar/roman-date';
+
+// One file per calendar day (MM-DD.yml) — only a handful exist so far
+// (content-authoring the full 366-day Roman Martyrology is a separate,
+// later task, same as full psalm-text authoring). Missing days resolve as
+// pending rather than throwing.
+const modules = import.meta.glob<{ default: MartyrologyEntry }>('../data/martyrology/*.yml', {
+  eager: true,
+});
+
+const entries = new Map<string, MartyrologyEntry>();
+for (const mod of Object.values(modules)) {
+  entries.set(mod.default.monthDay, mod.default);
+}
+
+const ENGLISH_MONTHS = [
+  'January',
+  'February',
+  'March',
+  'April',
+  'May',
+  'June',
+  'July',
+  'August',
+  'September',
+  'October',
+  'November',
+  'December',
+];
+
+function dayFollowing(isoDate: string): { month: number; day: number; year: number; monthDay: string } {
+  const date = new Date(`${isoDate}T00:00:00Z`);
+  date.setUTCDate(date.getUTCDate() + 1);
+  const month = date.getUTCMonth() + 1;
+  const day = date.getUTCDate();
+  const year = date.getUTCFullYear();
+  return { month, day, year, monthDay: `${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}` };
+}
+
+/**
+ * The Latin heading uses the real Roman Kalends/Nones/Ides date (see
+ * calendar/roman-date.ts); English dates are given in plain Gregorian
+ * form — there's no traditional English equivalent of the Kalends system.
+ */
+function heading(month: number, day: number, year: number): { la: string; en: string } {
+  const luna = lunaDay(month, day, year);
+  return {
+    la: `${romanDateLatin(month, day, year)} Luna ${lunaOrdinalLatin(luna)}. Anno Dómini ${year}.`,
+    en: `${ENGLISH_MONTHS[month - 1]} ${day}, ${year} — the ${lunaOrdinalEnglish(luna)} day of the Moon.`,
+  };
+}
+
+/**
+ * Monastic Prime reads *tomorrow's* Martyrology entry (the announcement of
+ * the next day's saints), not today's — this computes that offset so callers
+ * just pass the ordo's own date.
+ */
+export function getMartyrologyEntryFor(isoDate: string): MartyrologyEntry {
+  const { month, day, year, monthDay } = dayFollowing(isoDate);
+  const entry = entries.get(monthDay);
+  if (!entry) {
+    return { monthDay, text: {}, status: { la: 'missing', en: 'missing' } };
+  }
+
+  const head = heading(month, day, year);
+  return {
+    monthDay,
+    text: {
+      la: entry.text.la ? `${head.la}\n\n${entry.text.la}` : entry.text.la,
+      en: entry.text.en ? `${head.en}\n\n${entry.text.en}` : entry.text.en,
+    },
+    status: entry.status,
+  };
+}
+
+export type { MartyrologyEntry } from './types';