Fix ordinary-Sunday precedence and unify getDayLabel's commemoration rendering

Two related fixes surfaced while chasing why St. Gregory Thaumaturgus
appeared to be misdated on Nov 18:

- calendar/commemorations.ts's `ordinary-sunday` case was transferring a
  Semiduplex (or lower) saint off the Sunday instead of commemorating it
  in place — an earlier, unverified guess. Live-verified against both
  Tridentine 1906 and Divino Afflatu 1954 (St. Gregory Thaumaturgus, St.
  Clement, St. Apollinaris, St. Thomas Becket, all real cases): the saint
  stays and is commemorated on the Sunday itself, same as Simplex, never
  pushed to the next open day. This is what was actually moving Gregory
  onto Nov 18 — not a data error. `applyChristmasOctaveSunday`'s own
  Dec 26-29 special case needed a matching adjustment (per its own
  documented intent, the displaced saint there is deliberately *not*
  commemorated in place, since he reappears in full on Dec 30 instead).

- getDayLabel had five branches, each hand-assembling its own
  filter/format logic for which commemorations to show — which is why
  the octave phrasing, the closing-day title, and a missing Sunday
  commemoration turned into three separate bugs earlier instead of one.
  Replaced with a single shared `collectCommemorations` used by every
  branch. This also exposed that the sanctoral-winner branch never
  showed any commemorated saint at all, and every other branch only
  showed the *first* one (`.find()`), silently dropping real collisions
  — both now show every commemorated saint, matching this app's own
  generous-commemoration design.

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

tests/calendar/november-sanctoral.test.ts

@@ -53,7 +53,15 @@ describe('November sanctoral pull (first pass)', () => {
     expect(day.commemorations).toEqual([]);
   });
 
-  it('St. Clement transfers forward into St. Chrysogonus\'s day whenever his own date falls on a Sunday -- a single-day transfer this app models correctly, unlike August\'s multi-day-skip case', () => {
+  it("St. Clement (Semiduplex) is commemorated on his own Sunday rather than transferring, so St. Chrysogonus's own following day is unaffected either way", () => {
+    // Corrects an earlier, unverified assumption that a Semiduplex saint
+    // landing on an ordinary Sunday transfers forward -- live-verified
+    // (Divino Afflatu 1954) St. Clement is commemorated right there on
+    // Nov 23 ("Commemoratio: S. Clementis Papæ et Martyris"), same
+    // treatment Simplex already got (see calendar/commemorations.ts's
+    // `ordinary-sunday` case). St. Felicitas (Simplex, also native to
+    // Nov 23) is commemorated alongside him too, per this app's own
+    // generous-commemoration design.
     const clean = resolveDay('2032-11-24'); // Nov 23, 2032 is not a Sunday
     expect(clean.winner).toEqual({
       kind: 'sanctoral',
@@ -61,16 +69,22 @@ describe('November sanctoral pull (first pass)', () => {
       name: 'St. Chrysogonus, Martyr',
       rank: 'simplex',
     });
-    const transferred = resolveDay('2025-11-24'); // Nov 23, 2025 IS a Sunday
-    expect(transferred.winner).toEqual({
-      kind: 'sanctoral',
-      id: 'st-clement',
-      name: 'St. Clement I, Pope and Martyr',
-      rank: 'semiduplex',
-    });
-    expect(transferred.commemorations).toEqual([
-      { kind: 'sanctoral', id: 'st-chrysogonus', name: 'St. Chrysogonus, Martyr', rank: 'simplex' },
+    const onceASunday = resolveDay('2025-11-23'); // a Sunday
+    expect(onceASunday.winner).toEqual({ kind: 'temporal', id: 'post-pentecost-24' });
+    expect(onceASunday.commemorations).toEqual([
+      { kind: 'sanctoral', id: 'st-clement', name: 'St. Clement I, Pope and Martyr', rank: 'semiduplex' },
+      { kind: 'sanctoral', id: 'st-felicitas', name: 'St. Felicitas, Martyr', rank: 'simplex' },
     ]);
+    // St. Chrysogonus's own following day is untouched either way -- no
+    // incoming transfer any more.
+    const followingDay = resolveDay('2025-11-24');
+    expect(followingDay.winner).toEqual({
+      kind: 'sanctoral',
+      id: 'st-chrysogonus',
+      name: 'St. Chrysogonus, Martyr',
+      rank: 'simplex',
+    });
+    expect(followingDay.commemorations).toEqual([]);
   });
 
   it('St. Andrew wins outright at Duplex II. classis with a real proper collect and antiphon, commemorating the Advent feria itself in years his fixed date falls within Advent', () => {