fix: confirm visit datetime picker selection

docs/ACS작업일지.md

@@ -769,3 +769,14 @@
     - `/api/admin/teams` 200 OK.
     - `/api/visit-requests/upload` 테스트 엑셀 업로드 성공: `totalRows=1`, `successCount=1`, `errors=[]`.
     - 업로드로 생성된 테스트 신청은 즉시 취소 처리.
+
+- 2026-07-16 출입신청 일시 선택 UI 수정:
+  - 운영 서버 출입신청 화면에서 출입일시 캘린더의 `[입력]` 버튼 클릭 시 선택값이 확정되지 않는 문제 확인.
+  - `DateTimePicker`를 확정형 동작으로 변경:
+    - 달력 내부 선택값은 `draft`로 보관.
+    - `[입력]` 버튼 클릭 시 `visitFrom`/`visitTo` 값으로 반영 후 팝업 닫기.
+    - 팝업 open 상태를 컴포넌트 state로 제어해 브라우저별 동작 차이를 줄임.
+  - 검증:
+    - `npm.cmd run typecheck` 성공.
+    - `npm.cmd run build` 성공.
+    - `npm.cmd test` 성공.

frontend/src/components/DateTimePicker.tsx

@@ -1,4 +1,4 @@
-import React, { useRef } from 'react';
+import React, { useEffect, useState } from 'react';
 import DatePicker, { registerLocale } from 'react-datepicker';
 import { ko } from 'date-fns/locale';
 import 'react-datepicker/dist/react-datepicker.css';
@@ -14,31 +14,43 @@ interface Props {
 
 const pad = (n: number) => String(n).padStart(2, '0');
 
-/** Date → "YYYY-MM-DDTHH:mm" (local), the format the form/back-end expect. */
 function toLocalString(d: Date): string {
   return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`;
 }
 
-/**
+function fromLocalString(value: string): Date | null {
- * Korean-localized date+time picker that replaces the browser-native
+  return value ? new Date(value) : null;
- * <input type="datetime-local"> (whose popup labels/border/buttons cannot be
+}
- * styled). Keeps the calendar open until the user presses [입력] so the choice
+
- * is explicit.
- */
 export const DateTimePicker: React.FC<Props> = ({ value, onChange, placeholder }) => {
-  const ref = useRef<DatePicker>(null);
+  const [open, setOpen] = useState(false);
+  const [draft, setDraft] = useState<Date | null>(fromLocalString(value));
+
+  useEffect(() => {
+    setDraft(fromLocalString(value));
+  }, [value]);
+
+  const confirm = () => {
+    if (draft) {
+      onChange(toLocalString(draft));
+    }
+    setOpen(false);
+  };
 
   return (
     <DatePicker
-      ref={ref}
+      selected={draft}
-      selected={value ? new Date(value) : null}
+      onChange={(d: Date | null) => setDraft(d)}
-      onChange={(d: Date | null) => d && onChange(toLocalString(d))}
+      open={open}
+      onInputClick={() => setOpen(true)}
+      onCalendarOpen={() => setOpen(true)}
+      onClickOutside={() => setOpen(false)}
       showTimeSelect
       timeIntervals={5}
       timeCaption="시간"
-      timeFormat="a K:mm"
+      timeFormat="a h:mm"
-      dateFormat="yyyy.MM.dd (eee) a K:mm"
+      dateFormat="yyyy.MM.dd (eee) a h:mm"
-      dateFormatCalendar="yyyy.M월"
+      dateFormatCalendar="yyyy.MM"
       locale="ko"
       shouldCloseOnSelect={false}
       placeholderText={placeholder ?? '날짜와 시간을 선택하세요'}
@@ -46,7 +58,7 @@ export const DateTimePicker: React.FC<Props> = ({ value, onChange, placeholder }
       popperClassName="acs-datepicker"
     >
       <div className="dt-actions">
-        <button type="button" className="btn-primary dt-confirm" onClick={() => ref.current?.setOpen(false)}>
+        <button type="button" className="btn-primary dt-confirm" onClick={confirm}>
           입력
         </button>
       </div>