Function updateDTSTARTInRecurrenceRule

src/utils/helpers.ts:1044–1046

(recurrence: string, dateStr: string)

 * @returns Updated RRULE string with new DTSTART, or null on error
 */
export function updateDTSTARTInRecurrenceRule(recurrence: string, dateStr: string): string | null {
	return updateDTSTARTInRecurrenceRuleCore(recurrence, dateStr);
}

/**
 * Adds DTSTART to a recurrence rule with a specific time from user drag interaction