Event search (Ctrl+F), locale/RTL handling, weekday selector workday/weekend, refactored event handling, Firefox compatibility (#3)

Major refactoring for cleanup, with various bugfixes.

Weekday selector in Settings now shows workdays/weekend bars based on current locale (also used to choose default values). Weekday selector in event dialog uses the days set in settings, as expected.

src/stores/CalendarStore.js

@@ -4,7 +4,6 @@ import {
   fromLocalString,
   getLocaleWeekendDays,
   getMondayOfISOWeek,
-  getOccurrenceDate,
   DEFAULT_TZ,
 } from '@/utils/date'
 import { differenceInCalendarDays, addDays } from 'date-fns'
@@ -201,11 +200,6 @@ export const useCalendarStore = defineStore('calendar', {
         this.deleteEvent(baseId)
         return
       }
-      const nextStartStr = getOccurrenceDate(base, 1, DEFAULT_TZ)
-      if (!nextStartStr) {
-        this.deleteEvent(baseId)
-        return
-      }
       base.startDate = nextStartStr
       // keep same days length
       if (numericCount !== Infinity) base.recur.count = String(Math.max(1, numericCount - 1))
@@ -228,9 +222,11 @@ export const useCalendarStore = defineStore('calendar', {
       }
       const snapshot = { ...base }
       snapshot.recur = snapshot.recur ? { ...snapshot.recur } : null
+      if (base.recur.count === occurrenceIndex + 1) {
+        base.recur.count = occurrenceIndex
+        return
+      }
       base.recur.count = occurrenceIndex
-      const nextStartStr = getOccurrenceDate(snapshot, occurrenceIndex + 1, DEFAULT_TZ)
-      if (!nextStartStr) return
       const originalNumeric =
         snapshot.recur.count === 'unlimited' ? Infinity : parseInt(snapshot.recur.count, 10)
       let remainingCount = 'unlimited'