fix: [calendar] 대량 등록 다이얼로그 기존 데이터 표시 기능 추가

- BulkRegistrationDialog에 schedules prop 추가
- 다이얼로그 열릴 때 기존 등록 데이터를 텍스트로 변환하여 표시
- MNG 대량 등록과 동일한 동작

src/components/hr/CalendarManagement/BulkRegistrationDialog.tsx

@@ -1,13 +1,13 @@
 'use client';
 
-import { useState, useMemo } from 'react';
+import { useState, useMemo, useEffect } from 'react';
 import { Loader2, Info } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from '@/components/ui/dialog';
 import { Textarea } from '@/components/ui/textarea';
 import { Badge } from '@/components/ui/badge';
 import { toast } from 'sonner';
-import type { BulkScheduleItem, CalendarScheduleType } from './types';
+import type { BulkScheduleItem, CalendarSchedule, CalendarScheduleType } from './types';
 import { SCHEDULE_TYPE_LABELS, SCHEDULE_TYPE_BADGE_COLORS } from './types';
 import { bulkCreateCalendarSchedules } from './actions';
 
@@ -15,6 +15,7 @@ interface BulkRegistrationDialogProps {
   open: boolean;
   onOpenChange: (open: boolean) => void;
   onSuccess: () => void;
+  schedules?: CalendarSchedule[];
 }
 
 const TYPE_KEYWORD_MAP: Record<string, CalendarScheduleType> = {
@@ -65,10 +66,28 @@ function parseBulkText(text: string): BulkScheduleItem[] {
   return items;
 }
 
-export function BulkRegistrationDialog({ open, onOpenChange, onSuccess }: BulkRegistrationDialogProps) {
+function schedulesToText(schedules: CalendarSchedule[]): string {
+  return schedules.map((s) => {
+    const datePart = s.startDate === s.endDate ? s.startDate : `${s.startDate}~${s.endDate}`;
+    const typePart = s.type !== 'publicHoliday' ? ` [${SCHEDULE_TYPE_LABELS[s.type]}]` : '';
+    return `${datePart} ${s.name}${typePart}`;
+  }).join('\n');
+}
+
+export function BulkRegistrationDialog({ open, onOpenChange, onSuccess, schedules }: BulkRegistrationDialogProps) {
   const [text, setText] = useState('');
   const [isSaving, setIsSaving] = useState(false);
 
+  useEffect(() => {
+    if (open) {
+      if (schedules && schedules.length > 0) {
+        setText(schedulesToText(schedules));
+      } else {
+        setText('');
+      }
+    }
+  }, [open, schedules]);
+
   const parsedItems = useMemo(() => parseBulkText(text), [text]);
   const validItems = parsedItems.filter((item) => item.isValid);
 

src/components/hr/CalendarManagement/index.tsx

@@ -285,6 +285,7 @@ export function CalendarManagement() {
         open={bulkOpen}
         onOpenChange={setBulkOpen}
         onSuccess={loadData}
+        schedules={schedules}
       />
     </PageLayout>
   );