feat(of): proper readings for the movable Marian memorials

Mary, Mother of the Church and the Immaculate Heart of Mary are computed in the
engine (no fixed-date INI entry), so they fell back to the ferial. Attach their
proper Masses inline: Mary MotC = Gen 3:9-15,20 / Ps 87 / John 19:25-34;
Immaculate Heart = Isa 61:9-11 / 1 Sam 2 canticle / Luke 2:41-51. Verified they
render when observed (Immaculate Heart 2029-06-09). Extends TestOFMovableMemorials.

2 files changed, 24 insertions, 5 deletions

diff --git a/internal/calendar/calendar.go b/internal/calendar/calendar.go
index 99a24b3..d224e87 100644
--- a/internal/calendar/calendar.go
+++ b/internal/calendar/calendar.go
@@ -125,15 +125,21 @@ type movableCel struct {
 // Heart, i.e. easter+69).
 func movableMemorialsOF(y int) []movableCel {
 	e := Easter(y)
-	mk := func(off int, slug, en, pl string) movableCel {
+	mk := func(off int, slug, en, pl string, first, psalm, gospel string) movableCel {
 		return movableCel{when: e.AddDate(0, 0, off), cel: Celebration{
 			Slug: slug, Rank: RankMemorial, Class: ClassBVM, Colour: White, Layer: "universal",
 			Name: map[string]string{"en": en, "pl": pl},
+			// Proper readings (these memorials have no fixed-date entry to key from).
+			Masses: []Mass{{Readings: []Reading{
+				{Part: "first", Citation: first}, {Part: "psalm", Citation: psalm}, {Part: "gospel", Citation: gospel},
+			}}},
 		}}
 	}
 	return []movableCel{
-		mk(50, "mary-mother-of-the-church", "Mary, Mother of the Church", "Najświętszej Maryi Panny, Matki Kościoła"),
-		mk(69, "the-immaculate-heart-of-the-blessed-virgin-mary", "The Immaculate Heart of the Blessed Virgin Mary", "Niepokalanego Serca Najświętszej Maryi Panny"),
+		mk(50, "mary-mother-of-the-church", "Mary, Mother of the Church", "Najświętszej Maryi Panny, Matki Kościoła",
+			"Genesis 3:9-15,20", "Psalms 87:1-2,3+5,6-7", "John 19:25-34"),
+		mk(69, "the-immaculate-heart-of-the-blessed-virgin-mary", "The Immaculate Heart of the Blessed Virgin Mary", "Niepokalanego Serca Najświętszej Maryi Panny",
+			"Isaiah 61:9-11", "1 Samuel 2:1,4-5,6-7,8abcd", "Luke 2:41-51"),
 	}
 }
 
diff --git a/internal/calendar/coverage_test.go b/internal/calendar/coverage_test.go
index cbd3fde..c464e56 100644
--- a/internal/calendar/coverage_test.go
+++ b/internal/calendar/coverage_test.go
@@ -77,10 +77,23 @@ func TestOFMovableMemorials(t *testing.T) {
 	sel := calendar.DefaultSelection() // Ordinary Form
 	layers := []calendar.Layer{caldata.Universal()}
 
-	// Mary, Mother of the Church: Monday after Pentecost (2027: May 17).
-	if got := calendar.Compute(day(2027, time.May, 17), sel, layers); got.Observed.Slug != "mary-mother-of-the-church" {
+	// Mary, Mother of the Church: Monday after Pentecost (2027: May 17), with its
+	// proper readings (not the ferial).
+	got := calendar.Compute(day(2027, time.May, 17), sel, layers)
+	if got.Observed.Slug != "mary-mother-of-the-church" {
 		t.Errorf("2027-05-17: observed %q, want mary-mother-of-the-church", got.Observed.Slug)
 	}
+	var first string
+	for _, m := range got.Observed.Masses {
+		for _, r := range m.Readings {
+			if r.Part == "first" {
+				first = r.Citation
+			}
+		}
+	}
+	if first != "Genesis 3:9-15,20" {
+		t.Errorf("Mary MotC first reading = %q, want Genesis 3:9-15,20", first)
+	}
 	// Two obligatory memorials coincide (St Anthony of Padua + the Immaculate
 	// Heart, 2026-06-13): both become optional and the ferial is observed.
 	if got := calendar.Compute(day(2026, time.June, 13), sel, layers); got.Observed.Rank != calendar.RankFerial {