feat: 로그 파일 삭제 다이얼로그 및 일괄 삭제 기능

- alert 대신 다이얼로그로 삭제 확인
- 체크박스로 파일 선택 기능
- 전체 선택/해제 및 일괄 삭제 지원
- 삭제 중 로딩 상태 표시

frontend/src/pages/Admin.jsx

@@ -89,6 +89,8 @@ export default function Admin({ isMobile = false }) {
   const [logLoading, setLogLoading] = useState(false); // 로그 로딩
   const [serverDropdownOpen, setServerDropdownOpen] = useState(false); // 서버 드롭다운
   const [typeDropdownOpen, setTypeDropdownOpen] = useState(false); // 타입 드롭다운
+  const [deleteLogDialog, setDeleteLogDialog] = useState({ show: false, files: [], loading: false }); // 로그 삭제 다이얼로그
+  const [selectedLogFiles, setSelectedLogFiles] = useState(new Set()); // 선택된 로그 파일 ID
   const logEndRef = useRef(null);
   const logContainerRef = useRef(null);
   const isInitialLoad = useRef(true);
@@ -832,23 +834,66 @@ export default function Admin({ isMobile = false }) {
     }
   };
 
-  // 로그 파일 삭제
+  // 로그 파일 삭제 다이얼로그 열기
-  const deleteLogFile = async (file, e) => {
+  const openDeleteLogDialog = (files, e) => {
     if (e) e.stopPropagation();
-    if (!confirm(`${file.fileName} 파일을 삭제하시겠습니까?`)) return;
+    const fileArray = Array.isArray(files) ? files : [files];
+    setDeleteLogDialog({ show: true, files: fileArray, loading: false });
+  };
+
+  // 로그 파일 삭제 실행
+  const executeDeleteLog = async () => {
+    setDeleteLogDialog(prev => ({ ...prev, loading: true }));
     
     try {
       const token = localStorage.getItem('token');
-      const response = await fetch(`/api/admin/logfile?id=${file.id}`, {
+      
+      for (const file of deleteLogDialog.files) {
+        await fetch(`/api/admin/logfile?id=${file.id}`, {
           method: 'DELETE',
           headers: { 'Authorization': `Bearer ${token}` }
         });
-      
-      if (response.ok) {
-        fetchLogFiles(); // 목록 새로고침
       }
+      
+      setToast(`${deleteLogDialog.files.length}개 로그 파일 삭제 완료`);
+      fetchLogFiles();
+      setSelectedLogFiles(new Set());
     } catch (error) {
       console.error('로그 파일 삭제 실패:', error);
+      setToast('삭제 실패', true);
+    } finally {
+      setDeleteLogDialog({ show: false, files: [], loading: false });
+    }
+  };
+
+  // 로그 파일 선택 토글
+  const toggleLogFileSelect = (fileId, e) => {
+    e.stopPropagation();
+    setSelectedLogFiles(prev => {
+      const next = new Set(prev);
+      if (next.has(fileId)) {
+        next.delete(fileId);
+      } else {
+        next.add(fileId);
+      }
+      return next;
+    });
+  };
+
+  // 전체 선택/해제
+  const toggleSelectAllLogs = () => {
+    if (selectedLogFiles.size === logFiles.length) {
+      setSelectedLogFiles(new Set());
+    } else {
+      setSelectedLogFiles(new Set(logFiles.map(f => f.id)));
+    }
+  };
+
+  // 선택된 파일 일괄 삭제
+  const deleteSelectedLogs = () => {
+    const selectedFiles = logFiles.filter(f => selectedLogFiles.has(f.id));
+    if (selectedFiles.length > 0) {
+      openDeleteLogDialog(selectedFiles);
     }
   };
 
@@ -1542,6 +1587,34 @@ export default function Admin({ isMobile = false }) {
                   </div>
                 </div>
                 
+                {/* 일괄 삭제 컨트롤 */}
+                {logFiles.length > 0 && (
+                  <div className="flex items-center justify-between mb-2">
+                    <div className="flex items-center gap-2">
+                      <button
+                        onClick={toggleSelectAllLogs}
+                        className="text-xs text-zinc-400 hover:text-white transition-colors"
+                      >
+                        {selectedLogFiles.size === logFiles.length ? '전체 해제' : '전체 선택'}
+                      </button>
+                      {selectedLogFiles.size > 0 && (
+                        <span className="text-xs text-zinc-500">
+                          {selectedLogFiles.size}개 선택됨
+                        </span>
+                      )}
+                    </div>
+                    {selectedLogFiles.size > 0 && (
+                      <button
+                        onClick={deleteSelectedLogs}
+                        className="flex items-center gap-1 px-2 py-1 text-xs bg-red-600/20 text-red-400 hover:bg-red-600/30 rounded-lg transition-colors"
+                      >
+                        <Trash2 size={12} />
+                        선택 삭제 ({selectedLogFiles.size})
+                      </button>
+                    )}
+                  </div>
+                )}
+                
                 <div className="space-y-2 max-h-[300px] overflow-y-auto custom-scrollbar pr-2">
                   {logFiles.length === 0 ? (
                     <p className="text-zinc-500 text-sm text-center py-4">로그 파일이 없습니다</p>
@@ -1549,9 +1622,19 @@ export default function Admin({ isMobile = false }) {
                     logFiles.map((file) => (
                       <div 
                         key={file.id} 
-                        className="flex items-center justify-between p-3 bg-zinc-800/50 rounded-xl hover:bg-zinc-800 transition-colors cursor-pointer group"
+                        className={`flex items-center justify-between p-3 rounded-xl hover:bg-zinc-800 transition-colors cursor-pointer group ${
+                          selectedLogFiles.has(file.id) ? 'bg-zinc-700/50' : 'bg-zinc-800/50'
+                        }`}
                         onClick={() => viewLogContent(file)}
                       >
+                        <div className="flex items-center gap-2 flex-1 min-w-0">
+                          <input
+                            type="checkbox"
+                            checked={selectedLogFiles.has(file.id)}
+                            onChange={(e) => toggleLogFileSelect(file.id, e)}
+                            onClick={(e) => e.stopPropagation()}
+                            className="w-4 h-4 rounded border-zinc-600 bg-zinc-700 text-emerald-500 focus:ring-emerald-500 focus:ring-offset-0"
+                          />
                           <div className="flex-1 min-w-0">
                             <p className="text-white text-sm truncate group-hover:text-mc-green transition-colors">{file.fileName}</p>
                             <p className="text-xs text-zinc-500">
@@ -1564,10 +1647,11 @@ export default function Admin({ isMobile = false }) {
                               </span>
                             </p>
                           </div>
+                        </div>
                         <div className="flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
                           <Tooltip content="삭제">
                             <button 
-                              onClick={(e) => deleteLogFile(file, e)}
+                              onClick={(e) => openDeleteLogDialog(file, e)}
                               className="p-2 text-zinc-400 hover:text-red-500 hover:bg-zinc-700 rounded-lg transition-colors"
                             >
                               <Trash2 size={16} />
@@ -2573,6 +2657,66 @@ export default function Admin({ isMobile = false }) {
           </motion.div>
         )}
 
+        {/* 로그 삭제 확인 다이얼로그 */}
+        {deleteLogDialog.show && (
+          <motion.div
+            initial={{ opacity: 0 }}
+            animate={{ opacity: 1 }}
+            exit={{ opacity: 0 }}
+            className="fixed inset-0 bg-black/60 backdrop-blur-sm flex items-center justify-center z-50"
+            onClick={() => !deleteLogDialog.loading && setDeleteLogDialog({ show: false, files: [], loading: false })}
+          >
+            <motion.div
+              initial={{ scale: 0.9, opacity: 0 }}
+              animate={{ scale: 1, opacity: 1 }}
+              exit={{ scale: 0.9, opacity: 0 }}
+              className="bg-zinc-900 border border-zinc-800 rounded-2xl p-6 w-full max-w-sm mx-4"
+              onClick={e => e.stopPropagation()}
+            >
+              <h3 className="text-white text-lg font-medium mb-2">로그 파일 삭제</h3>
+              <p className="text-zinc-400 text-sm mb-4">
+                {deleteLogDialog.files.length === 1 ? (
+                  <>
+                    <span className="text-red-400 font-medium">{deleteLogDialog.files[0]?.fileName}</span> 파일을 삭제하시겠습니까?
+                  </>
+                ) : (
+                  <>
+                    <span className="text-red-400 font-medium">{deleteLogDialog.files.length}개</span> 파일을 삭제하시겠습니까?
+                  </>
+                )}
+              </p>
+              {deleteLogDialog.files.length > 1 && (
+                <div className="max-h-32 overflow-y-auto custom-scrollbar mb-4 space-y-1">
+                  {deleteLogDialog.files.map(f => (
+                    <div key={f.id} className="text-xs text-zinc-500 truncate">• {f.fileName}</div>
+                  ))}
+                </div>
+              )}
+              <div className="flex gap-3">
+                <button
+                  onClick={() => setDeleteLogDialog({ show: false, files: [], loading: false })}
+                  disabled={deleteLogDialog.loading}
+                  className="flex-1 py-2.5 bg-zinc-800 hover:bg-zinc-700 disabled:opacity-50 text-white font-medium rounded-xl transition-colors"
+                >
+                  취소
+                </button>
+                <button
+                  onClick={executeDeleteLog}
+                  disabled={deleteLogDialog.loading}
+                  className="flex-1 py-2.5 bg-red-600 hover:bg-red-500 disabled:bg-red-800 text-white font-medium rounded-xl transition-colors flex items-center justify-center gap-2"
+                >
+                  {deleteLogDialog.loading ? (
+                    <>
+                      <Loader2 size={16} className="animate-spin" />
+                      삭제 중...
+                    </>
+                  ) : '삭제'}
+                </button>
+              </div>
+            </motion.div>
+          </motion.div>
+        )}
+
         {/* 로그 뷰어 다이얼로그 */}
         {logViewerOpen && (
           <motion.div