fix: PC 공개 일정 페이지 HTML 엔티티 디코딩 수정

- decodeHtmlEntities 함수 추가하여 < > 등 올바르게 표시
- 레이아웃 변경 없음 (원래 상태 유지)

frontend/src/pages/pc/public/Schedule.jsx

@@ -7,6 +7,14 @@ import { useInView } from 'react-intersection-observer';
 import { getTodayKST } from '../../../utils/date';
 import { getSchedules, getCategories, searchSchedules as searchSchedulesApi } from '../../../api/public/schedules';
 
+// HTML 엔티티 디코딩 함수
+const decodeHtmlEntities = (text) => {
+    if (!text) return '';
+    const textarea = document.createElement('textarea');
+    textarea.innerHTML = text;
+    return textarea.value;
+};
+
 function Schedule() {
     const navigate = useNavigate();
     
@@ -840,7 +848,7 @@ function Schedule() {
 
                                                     {/* 스케줄 내용 */}
                                                     <div className="flex-1 p-6 flex flex-col justify-center">
-                                                        <h3 className="font-bold text-lg mb-2">{schedule.title}</h3>
+                                                        <h3 className="font-bold text-lg mb-2">{decodeHtmlEntities(schedule.title)}</h3>
                                                         
                                                         <div className="flex flex-wrap gap-3 text-base text-gray-500">
                                                             {schedule.time && (
@@ -927,7 +935,7 @@ function Schedule() {
                                                     <span className="text-sm font-medium opacity-80">{formatted.weekday}</span>
                                                 </div>
                                                 <div className="flex-1 p-6 flex flex-col justify-center">
-                                                    <h3 className="font-bold text-lg mb-2">{schedule.title}</h3>
+                                                    <h3 className="font-bold text-lg mb-2">{decodeHtmlEntities(schedule.title)}</h3>
                                                     <div className="flex flex-wrap gap-3 text-base text-gray-500">
                                                         {schedule.time && (
                                                             <span className="flex items-center gap-1">