db123
577aee91fb
refactor: remove dead code, DRY calendar navigation and helpers
- Fix Jalali calendar weekday offset in buildCalendarMonth
- Remove unused gregorianDateKey function and PairCount field
- Replace inline export month title with formatMonthTitle
- Extract navMonth helper for prev/next month navigation
- Extract sendOrEdit helper for send-vs-edit message pattern
- Extract monthGregorianRange helper to simplify editCalendar 3-way switch
- Replace export displayDate conversion with formatDateForCalendar