fix(admin-schedule): 공용폼 토글 정렬·멤버 필터·날짜미정 연월 드롭다운

- 날짜미정 토글을 검증된 패턴(relative w-11 + absolute translate-x-5)으로
  교체해 상하/좌우 여백 균일화
- 멤버 목록을 현재 활동 멤버만(is_former 제외)으로 필터
- 날짜미정일 때 달력 대신 연/월 드롭다운으로 입력(YYYY-MM-01 저장)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/pages/pc/admin/schedules/ScheduleForm.jsx

@@ -46,12 +46,14 @@ function ScheduleForm() {
     queryFn: categoriesApi.getCategories,
     staleTime: 10 * 60 * 1000,
   });
-  const { data: members = [] } = useQuery({
+  const { data: allMembers = [] } = useQuery({
     queryKey: ['members'],
     queryFn: getMembers,
     staleTime: 10 * 60 * 1000,
   });
 
+  // 현재 활동 멤버만 (탈퇴 멤버 제외)
+  const members = useMemo(() => allMembers.filter((m) => !m.is_former), [allMembers]);
   const categories = useMemo(
     () => allCategories.filter((c) => SHARED_CATEGORIES.includes(c.name)),
     [allCategories]
@@ -101,7 +103,23 @@ function ScheduleForm() {
     }));
 
   const setPrecision = (month) =>
-    setFormData((p) => ({ ...p, datePrecision: month ? 'month' : 'day', time: month ? '' : p.time }));
+    setFormData((p) => {
+      if (!month) return { ...p, datePrecision: 'day' };
+      // 월 모드: 날짜가 비었으면 이번 달 1일로 기본값
+      const hasMonthDate = /^\d{4}-\d{2}-01$/.test(p.date);
+      const now = new Date();
+      const date = hasMonthDate
+        ? p.date
+        : `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-01`;
+      return { ...p, datePrecision: 'month', time: '', date };
+    });
+
+  // 연/월 드롭다운용
+  const yearNow = new Date().getFullYear();
+  const YEAR_OPTIONS = [yearNow - 1, yearNow, yearNow + 1, yearNow + 2];
+  const [selYear, selMonth] = (formData.date || '').split('-');
+  const setMonthDate = (year, monthNum) =>
+    setFormData((p) => ({ ...p, date: `${year}-${String(monthNum).padStart(2, '0')}-01` }));
 
   const handleSubmit = async (e) => {
     e.preventDefault();
@@ -240,13 +258,13 @@ function ScheduleForm() {
                   <button
                     type="button"
                     onClick={() => setPrecision(!isMonthPrecision)}
-                    className={`relative w-12 h-6 rounded-full transition-colors ${
+                    className={`relative flex-shrink-0 w-11 h-6 rounded-full transition-colors ${
                       isMonthPrecision ? 'bg-primary' : 'bg-gray-300'
                     }`}
                   >
                     <span
-                      className={`absolute top-0.5 w-5 h-5 bg-white rounded-full shadow transition-all ${
-                        isMonthPrecision ? 'left-6' : 'left-0.5'
+                      className={`absolute top-0.5 left-0.5 w-5 h-5 bg-white rounded-full shadow transition-transform ${
+                        isMonthPrecision ? 'translate-x-5' : ''
                       }`}
                     />
                   </button>
@@ -255,27 +273,49 @@ function ScheduleForm() {
 
               {/* 날짜 + 시간 */}
               <div className="grid grid-cols-2 gap-6">
-                <div>
-                  <label className="block text-sm font-medium text-gray-700 mb-2">
-                    {isMonthPrecision ? '월 *' : '날짜 *'}
-                  </label>
-                  <DatePicker
-                    value={formData.date}
-                    onChange={(date) => setFormData({ ...formData, date })}
-                    minYear={2017}
-                  />
-                  {isMonthPrecision && (
-                    <p className="text-xs text-gray-400 mt-1">선택한 날짜의 "월"만 사용됩니다 (일자는 무시)</p>
-                  )}
-                </div>
-                {!isMonthPrecision && (
+                {isMonthPrecision ? (
+                  // 날짜 미정: 연 + 월 드롭다운
                   <div>
-                    <label className="block text-sm font-medium text-gray-700 mb-2">시간</label>
-                    <TimePicker
-                      value={formData.time}
-                      onChange={(time) => setFormData({ ...formData, time })}
-                    />
+                    <label className="block text-sm font-medium text-gray-700 mb-2">연 / 월 *</label>
+                    <div className="flex gap-3">
+                      <select
+                        value={selYear || yearNow}
+                        onChange={(e) => setMonthDate(e.target.value, parseInt(selMonth, 10))}
+                        className="flex-1 px-4 py-3 border border-gray-200 rounded-xl bg-white focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent"
+                      >
+                        {YEAR_OPTIONS.map((y) => (
+                          <option key={y} value={y}>{y}년</option>
+                        ))}
+                      </select>
+                      <select
+                        value={parseInt(selMonth, 10) || ''}
+                        onChange={(e) => setMonthDate(selYear || yearNow, e.target.value)}
+                        className="flex-1 px-4 py-3 border border-gray-200 rounded-xl bg-white focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent"
+                      >
+                        {Array.from({ length: 12 }, (_, i) => i + 1).map((m) => (
+                          <option key={m} value={m}>{m}월</option>
+                        ))}
+                      </select>
+                    </div>
                   </div>
+                ) : (
+                  <>
+                    <div>
+                      <label className="block text-sm font-medium text-gray-700 mb-2">날짜 *</label>
+                      <DatePicker
+                        value={formData.date}
+                        onChange={(date) => setFormData({ ...formData, date })}
+                        minYear={2017}
+                      />
+                    </div>
+                    <div>
+                      <label className="block text-sm font-medium text-gray-700 mb-2">시간</label>
+                      <TimePicker
+                        value={formData.time}
+                        onChange={(time) => setFormData({ ...formData, time })}
+                      />
+                    </div>
+                  </>
                 )}
               </div>
             </div>