diff --git a/ui/src/views/classroom/RoomDetail.tsx b/ui/src/views/classroom/RoomDetail.tsx
index 6b83a1c5..31f53b6f 100644
--- a/ui/src/views/classroom/RoomDetail.tsx
+++ b/ui/src/views/classroom/RoomDetail.tsx
@@ -133,8 +133,6 @@ const RoomDetail: React.FC = () => {
     autoMuteNewParticipants: true,
   })
 
-  const hasTeacher = (list: ClassroomParticipantDto[]) => list.some((p) => p.isTeacher)
-
   const signalRServiceRef = useRef<SignalRService>()
   const webRTCServiceRef = useRef<WebRTCService>()
 
@@ -668,17 +666,6 @@ const RoomDetail: React.FC = () => {
     return `${mins}m`
   }
 
-  const getTimeSince = (timestamp: string) => {
-    const now = new Date()
-    const time = new Date(timestamp)
-    const diffMinutes = Math.floor((now.getTime() - time.getTime()) / 60000)
-
-    if (diffMinutes < 1) return 'Az önce'
-    if (diffMinutes < 60) return `${diffMinutes} dakika önce`
-    const hours = Math.floor(diffMinutes / 60)
-    return `${hours} saat önce`
-  }
-
   const getFileIcon = (type: string) => {
     if (type.includes('pdf')) return <FaFilePdf className="text-red-500" />
     if (
@@ -700,43 +687,6 @@ const RoomDetail: React.FC = () => {
     return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i]
   }
 
-  const handleDrop = (e: React.DragEvent) => {
-    e.preventDefault()
-    setDragOver(false)
-
-    if (user.role !== 'teacher' || !handleUploadDocument) return
-
-    const files = Array.from(e.dataTransfer.files)
-    files.forEach((file) => handleUploadDocument(file))
-  }
-
-  const handleFileSelect = (e: React.ChangeEvent<HTMLInputElement>) => {
-    if (user.role !== 'teacher' || !handleUploadDocument) return
-
-    const files = Array.from(e.target.files || [])
-    files.forEach((file) => handleUploadDocument(file))
-
-    // Reset input
-    if (fileInputRef.current) {
-      fileInputRef.current.value = ''
-    }
-  }
-
-  const getLayoutIcon = (type: string) => {
-    switch (type) {
-      case 'grid':
-        return <FaTh size={24} />
-      case 'speaker':
-        return <FaExpand size={24} />
-      case 'presentation':
-        return <FaDesktop size={24} />
-      case 'sidebar':
-        return <FaUsers size={24} />
-      default:
-        return <FaTh size={24} />
-    }
-  }
-
   const renderSidePanel = () => {
     if (!activeSidePanel) return null
 
@@ -812,6 +762,16 @@ const RoomDetail: React.FC = () => {
     }
   }
 
+  useEffect(() => {
+    window.addEventListener('beforeunload', handleLeaveCall)
+    window.addEventListener('pagehide', handleLeaveCall) 
+
+    return () => {
+      window.removeEventListener('beforeunload', handleLeaveCall)
+      window.removeEventListener('pagehide', handleLeaveCall)
+    }
+  }, [classSession.id])
+
   return (
     <>
       <Helmet