관리자 일정 목록에 외부 링크 버튼 추가

- URL이 있는 일정에 파란색 외부 링크 버튼 표시
- 수정/삭제 버튼 앞에 배치

frontend/src/pages/pc/admin/AdminSchedule.jsx

@@ -3,8 +3,9 @@ import { useNavigate, Link } from 'react-router-dom';
 import { motion, AnimatePresence } from 'framer-motion';
 import { 
     LogOut, Home, ChevronRight, Calendar, Plus, Edit2, Trash2,
-    ChevronLeft, Search, ChevronDown, AlertTriangle, Bot, Tag, ArrowLeft
+    ChevronLeft, Search, ChevronDown, AlertTriangle, Bot, Tag, ArrowLeft, ExternalLink
 } from 'lucide-react';
+
 import Toast from '../../../components/Toast';
 import Tooltip from '../../../components/Tooltip';
 
@@ -1040,6 +1041,17 @@ function AdminSchedule() {
 
                                                 {/* 액션 버튼 */}
                                                 <div className="flex items-center gap-2 opacity-0 group-hover:opacity-100 transition-opacity">
+                                                    {schedule.source_url && (
+                                                        <a 
+                                                            href={schedule.source_url}
+                                                            target="_blank"
+                                                            rel="noopener noreferrer"
+                                                            onClick={(e) => e.stopPropagation()}
+                                                            className="p-2 hover:bg-blue-100 rounded-lg transition-colors text-blue-500"
+                                                        >
+                                                            <ExternalLink size={18} />
+                                                        </a>
+                                                    )}
                                                     <button 
                                                         onClick={() => navigate(`/admin/schedule/${schedule.id}/edit`)}
                                                         className="p-2 hover:bg-gray-200 rounded-lg transition-colors text-gray-500"
@@ -1053,6 +1065,7 @@ function AdminSchedule() {
                                                         <Trash2 size={18} />
                                                     </button>
                                                 </div>
+
                                             </div>
                                         </motion.div>
                                     ))}