fix: 캘린더 모달 중복 카드 문제 및 삭제 권한 개선

- monthly_worker_status 조회 시 GROUP BY로 중복 데이터 합산
- 작업보고서 삭제 권한을 그룹장 이상으로 제한 (admin, system, group_leader)
- 중복 데이터 정리를 위한 마이그레이션 SQL 추가 (009_fix_duplicate_monthly_status.sql)
- synology_deployment 버전에도 동일 수정 적용

synology_deployment/web-ui/css/work-report.css

@@ -0,0 +1,108 @@
+/* ✅ /css/workreport.css */
+
+body {
+  font-family: 'Malgun Gothic', sans-serif;
+  background-color: #f8f9fa;
+  margin: 0;
+  padding: 30px;
+  color: #333;
+}
+
+h2 {
+  text-align: center;
+  color: #1976d2;
+  margin-bottom: 20px;
+}
+
+#calendar {
+  max-width: 500px;
+  margin: 0 auto 30px;
+  display: grid;
+  grid-template-columns: repeat(7, 1fr);
+  gap: 4px;
+  text-align: center;
+}
+
+#calendar .nav {
+  grid-column: span 7;
+  display: flex;
+  justify-content: space-between;
+  margin-bottom: 10px;
+}
+
+#calendar button {
+  padding: 8px;
+  background-color: #ffffff;
+  border: 1px solid #ccc;
+  cursor: pointer;
+  border-radius: 4px;
+}
+
+#calendar button:hover {
+  background-color: #e3f2fd;
+}
+
+.selected-date {
+  background-color: #4caf50 !important;
+  color: white;
+  font-weight: bold;
+}
+
+table {
+  width: 100%;
+  max-width: 1200px;
+  margin: auto;
+  border-collapse: collapse;
+  background-color: white;
+  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
+}
+
+th, td {
+  border: 1px solid #ddd;
+  padding: 10px;
+  text-align: center;
+}
+
+th {
+  background-color: #f1f3f4;
+  color: #333;
+}
+
+select,
+input[type="text"] {
+  width: 100%;
+  padding: 6px;
+  border: 1px solid #ccc;
+  border-radius: 4px;
+  box-sizing: border-box;
+}
+
+.remove-btn {
+  background-color: #d9534f;
+  color: white;
+  border: none;
+  padding: 6px 12px;
+  border-radius: 4px;
+  cursor: pointer;
+}
+
+.remove-btn:hover {
+  background-color: #c9302c;
+}
+
+.submit-btn {
+  display: block;
+  margin: 30px auto;
+  padding: 12px 30px;
+  font-size: 1rem;
+  font-weight: bold;
+  background-color: #1976d2;
+  color: white;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+.submit-btn:hover {
+  background-color: #1565c0;
+}