Model Ascension, Corpus Christi, and the Sacred Heart as temporal feasts

Adds pre-1955 TemporalFeastRecords (rank duplex-1-classis, real octaves)
for the three "feasts of the Lord" that were previously only referenced
as bare date offsets: Corpus Christi/Sacred Heart's own days already
couldn't lose to a sanctoral candidate, but with no record the day fell
back to the generic Trinity-week feria collect and never displayed its
real name; Ascension had no protection at all against an ordinary saint
winning it outright. Sacred Heart's own record carries the
forbidsSuccessorCommemoration flag added in the prior commit, refusing to
commemorate Most Precious Blood on the rare late-Easter date they fall
adjacent.

octave.wins is set to duplex on all three, matching Pentecost's own
verified threshold, despite a known conflict with a previously
live-verified case (St. Ubald winning First Vespers within Ascension's
own octave) -- kept per direct instruction; the affected tests (Ubald,
St. Margaret of Scotland) were updated to assert the new behavior, and
the tradeoff is documented in ascension.yml and TODO.md. A handful of
unrelated test fixtures that happened to land inside these new octave
windows were moved to nearby clean dates.

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

tests/calendar/day-label.test.ts

@@ -75,10 +75,14 @@ describe('getDayLabel — ordinal temporal label', () => {
 
   it('falls back to weekday + season name for seasons with no ordinal convention modeled', () => {
     // 2026-05-15 is now St. John Baptist de la Salle's own fixed day
-    // (Duplex, added per the full-year sanctoral import) -- moved to
-    // May 21, still within Ascensiontide 2026 (May 14-23) and still
-    // free of any sanctoral entry.
-    expect(getDayLabel(resolveDay('2026-05-21')).en).toContain('in Ascensiontide');
+    // (Duplex, added per the full-year sanctoral import); May 21 is now
+    // Ascension's own octave closing day (Ascension now modeled as a
+    // real TemporalFeastRecord with an octave, Easter+39 through +46 —
+    // see TODO.md's 2026-08-26 entry), and May 22/23 both carry a fixed
+    // saint of their own -- 2028-06-03 (Easter+48, the day before
+    // Pentecost) is the nearest genuinely free Ascensiontide day: past
+    // Ascension's own octave, no fixed saint, still short of Pentecost.
+    expect(getDayLabel(resolveDay('2028-06-03')).en).toContain('in Ascensiontide');
   });
 });
 
@@ -339,12 +343,20 @@ describe('getDayLabel — named temporal feast rank', () => {
 });
 
 describe('getDayLabel — feast name combination', () => {
+  // 2026-06-15 (the "2nd week after Trinity" Monday, Easter+71) used to
+  // be free of any octave; now it's day 4 of Sacred Heart's own octave
+  // (Easter+68 through +75, added 2026-08-26 -- see TODO.md), and that
+  // offset range is fixed relative to Easter every year, not just this
+  // one, so no year-swap avoids it for "2nd week after Trinity"
+  // specifically. Moved to the "3rd week after Trinity" Monday
+  // (Easter+78) instead, clear of Ascension's (+39..+46) and the
+  // Corpus Christi/Sacred Heart combined (+60..+75) octave ranges.
   const base: LiturgicalDay = {
-    date: '2026-06-15',
+    date: '2026-06-22',
     weekday: 'monday',
     season: 'trinitytide',
     temporalCategory: 'ordinary-feria',
-    winner: { kind: 'temporal', id: 'post-pentecost-02' },
+    winner: { kind: 'temporal', id: 'post-pentecost-03' },
     commemorations: [],
   };
 
@@ -361,10 +373,10 @@ describe('getDayLabel — feast name combination', () => {
       ...base,
       commemorations: [{ kind: 'sanctoral', id: 'x', name: 'St. Ereden', rank: 'duplex-2-classis' }],
     };
-    expect(getDayLabel(day).en).toBe('St. Ereden — Monday in the 2nd week after Trinity (Feria)');
+    expect(getDayLabel(day).en).toBe('St. Ereden — Monday in the 3rd week after Trinity (Feria)');
   });
 
   it('shows just the temporal label when nothing is commemorated at all', () => {
-    expect(getDayLabel(base).en).toBe('Monday in the 2nd week after Trinity (Feria)');
+    expect(getDayLabel(base).en).toBe('Monday in the 3rd week after Trinity (Feria)');
   });
 });