feat: Gregorian default calendar, Hymnal label, day header cleanup

- Default calendar type julian -> gregorian (new installs only)
- EN nav 'Sbornik' -> 'Hymnal', section title -> 'Liturgical Hymnal'
- Day header: text-sm on date lines, weekday dropped from Julian line,
  order: Julian / day-title / Gregorian

src/ui/settings-view.ts

@@ -47,7 +47,7 @@ const DEFAULT_SETTINGS: Settings = {
   defaultBibleVersion: 'kjv',
   showVerseNumbers: true,
   verseNewLine: false,
-  calendarType: 'julian',
+  calendarType: 'gregorian',
   serviceRole: 'priest',
   latitude: 55.7558,
   longitude: 37.6176,