观影室增加屏幕共享

server.js

@@ -32,6 +32,8 @@ class WatchRoomServer {
     this.rooms = new Map();
     this.members = new Map();
     this.socketToRoom = new Map();
+    this.screenHelpers = new Map();
+    this.helperToRoom = new Map();
     this.roomDeletionTimers = new Map(); // 房间延迟删除定时器
     this.cleanupInterval = null;
     this.setupEventHandlers();
@@ -55,6 +57,7 @@ class WatchRoomServer {
             description: data.description,
             password: data.password,
             isPublic: data.isPublic,
+            roomType: data.roomType || 'sync',
             ownerId: userId,
             ownerName: data.userName,
             ownerToken: ownerToken, // 保存房主令牌
@@ -260,6 +263,114 @@ class WatchRoomServer {
         }
       });
 
+      socket.on('screen:helper-register', (data, callback) => {
+        try {
+          const room = this.rooms.get(data.roomId);
+          if (!room) {
+            callback({ success: false, error: '房间不存在' });
+            return;
+          }
+
+          if (room.ownerToken !== data.ownerToken) {
+            callback({ success: false, error: '房主身份验证失败' });
+            return;
+          }
+
+          const oldHelperSocketId = this.screenHelpers.get(data.roomId);
+          if (oldHelperSocketId && oldHelperSocketId !== socket.id) {
+            this.helperToRoom.delete(oldHelperSocketId);
+          }
+
+          this.screenHelpers.set(data.roomId, socket.id);
+          this.helperToRoom.set(socket.id, data.roomId);
+          callback({ success: true });
+        } catch (error) {
+          console.error('[WatchRoom] Error registering screen helper:', error);
+          callback({ success: false, error: '注册共享控制窗口失败' });
+        }
+      });
+
+      // 开始屏幕共享
+      socket.on('screen:start', (state) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        const roomId = roomInfo?.roomId || helperRoomId;
+        if (!roomId) return;
+        if (helperRoomId && this.screenHelpers.get(helperRoomId) !== socket.id) return;
+        if (roomInfo && !roomInfo.isOwner) return;
+
+        const room = this.rooms.get(roomId);
+        if (room) {
+          room.currentState = state;
+          this.rooms.set(roomId, room);
+          this.io.to(roomId).emit('screen:start', state);
+        }
+      });
+
+      // 停止屏幕共享
+      socket.on('screen:stop', () => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        const roomId = roomInfo?.roomId || helperRoomId;
+        if (!roomId) return;
+        if (helperRoomId && this.screenHelpers.get(helperRoomId) !== socket.id) return;
+        if (roomInfo && !roomInfo.isOwner) return;
+
+        const room = this.rooms.get(roomId);
+        if (room) {
+          room.currentState = null;
+          this.rooms.set(roomId, room);
+          this.io.to(roomId).emit('screen:stop');
+        }
+      });
+
+      socket.on('screen:viewer-ready', () => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        if (!roomInfo) return;
+
+        const room = this.rooms.get(roomInfo.roomId);
+        if (!room || roomInfo.isOwner || room.currentState?.type !== 'screen') return;
+
+        const targetSocketId = this.screenHelpers.get(roomInfo.roomId) || room.ownerId;
+        this.io.to(targetSocketId).emit('screen:viewer-ready', {
+          userId: socket.id,
+        });
+      });
+
+      // 屏幕共享 WebRTC 信令
+      socket.on('screen:offer', (data) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (!roomInfo && !helperRoomId) return;
+
+        this.io.to(data.targetUserId).emit('screen:offer', {
+          userId: socket.id,
+          offer: data.offer,
+        });
+      });
+
+      socket.on('screen:answer', (data) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (!roomInfo && !helperRoomId) return;
+
+        this.io.to(data.targetUserId).emit('screen:answer', {
+          userId: socket.id,
+          answer: data.answer,
+        });
+      });
+
+      socket.on('screen:ice', (data) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (!roomInfo && !helperRoomId) return;
+
+        this.io.to(data.targetUserId).emit('screen:ice', {
+          userId: socket.id,
+          candidate: data.candidate,
+        });
+      });
+
       // 聊天消息
       socket.on('chat:message', (data) => {
         const roomInfo = this.socketToRoom.get(socket.id);
@@ -347,6 +458,19 @@ class WatchRoomServer {
       // 断开连接
       socket.on('disconnect', () => {
         console.log(`[WatchRoom] Client disconnected: ${socket.id}`);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (helperRoomId) {
+          this.helperToRoom.delete(socket.id);
+          if (this.screenHelpers.get(helperRoomId) === socket.id) {
+            this.screenHelpers.delete(helperRoomId);
+            const room = this.rooms.get(helperRoomId);
+            if (room && room.currentState?.type === 'screen') {
+              room.currentState = null;
+              this.rooms.set(helperRoomId, room);
+              this.io.to(helperRoomId).emit('screen:stop');
+            }
+          }
+        }
         this.handleLeaveRoom(socket);
       });
     });
@@ -425,6 +549,11 @@ class WatchRoomServer {
 
     this.rooms.delete(roomId);
     this.members.delete(roomId);
+    const helperSocketId = this.screenHelpers.get(roomId);
+    if (helperSocketId) {
+      this.helperToRoom.delete(helperSocketId);
+      this.screenHelpers.delete(roomId);
+    }
   }
 
   startCleanupTimer() {

src/app/watch-room/page.tsx

@@ -10,7 +10,7 @@ import { getAuthInfoFromBrowserCookie } from '@/lib/auth';
 import PageLayout from '@/components/PageLayout';
 import { useWatchRoomContext } from '@/components/WatchRoomProvider';
 
-import type { Room } from '@/types/watch-room';
+import type { Room, RoomType } from '@/types/watch-room';
 
 type TabType = 'create' | 'join' | 'list';
 
@@ -34,6 +34,7 @@ export default function WatchRoomPage() {
     description: '',
     password: '',
     isPublic: true,
+    roomType: 'sync' as RoomType,
   });
 
   // 加入房间表单
@@ -49,26 +50,30 @@ export default function WatchRoomPage() {
   const [joinLoading, setJoinLoading] = useState(false);
 
   // 加载房间列表
-  const loadRooms = async () => {
+  const loadRooms = async (showLoading = false) => {
     if (!isConnected) return;
 
-    setLoading(true);
+    if (showLoading) {
+      setLoading(true);
+    }
     try {
       const roomList = await getRoomList();
       setRooms(roomList);
     } catch (error) {
       console.error('[WatchRoom] Failed to load rooms:', error);
     } finally {
-      setLoading(false);
+      if (showLoading) {
+        setLoading(false);
+      }
     }
   };
 
   // 切换到房间列表 tab 时加载房间
   useEffect(() => {
     if (activeTab === 'list') {
-      loadRooms();
+      loadRooms(true);
       // 每5秒刷新一次
-      const interval = setInterval(loadRooms, 5000);
+      const interval = setInterval(() => loadRooms(false), 5000);
       return () => clearInterval(interval);
     }
   }, [activeTab, isConnected]);
@@ -88,6 +93,7 @@ export default function WatchRoomPage() {
         description: createForm.description.trim(),
         password: createForm.password.trim() || undefined,
         isPublic: createForm.isPublic,
+        roomType: createForm.roomType,
         userName: currentUsername,
       });
 
@@ -97,6 +103,7 @@ export default function WatchRoomPage() {
         description: '',
         password: '',
         isPublic: true,
+        roomType: 'sync',
       });
     } catch (error: any) {
       alert(error.message || '创建房间失败');
@@ -141,6 +148,11 @@ export default function WatchRoomPage() {
   useEffect(() => {
     if (!currentRoom || isOwner) return;
 
+    if (currentRoom.roomType === 'screen') {
+      router.push('/watch-room/screen');
+      return;
+    }
+
     // 房员加入房间后，不立即跳转
     // 而是监听 play:change 或 live:change 事件（说明房主正在活跃使用）
     // 这样可以避免房主已经离开play页面但状态未清除的情况
@@ -153,6 +165,8 @@ export default function WatchRoomPage() {
   useEffect(() => {
     if (!currentRoom || isOwner) return;
 
+    if (currentRoom.roomType === 'screen') return;
+
     const handlePlayChange = (state: any) => {
       if (state.type === 'play') {
         const params = new URLSearchParams({
@@ -196,6 +210,13 @@ export default function WatchRoomPage() {
     }
   }, [currentRoom, isOwner, router, socket]);
 
+  // 屏幕共享房间创建/加入后直接进入共享页
+  useEffect(() => {
+    if (currentRoom?.roomType === 'screen') {
+      router.push('/watch-room/screen');
+    }
+  }, [currentRoom?.id, currentRoom?.roomType, router]);
+
   // 从房间列表加入房间
   const handleJoinFromList = (room: Room) => {
     setJoinForm({
@@ -237,7 +258,9 @@ export default function WatchRoomPage() {
                 </div>
                 <div className="flex-1">
                   <h3 className="text-lg font-bold mb-1">
-                    {currentRoom.currentState ? '房主正在播放' : '等待房主开始播放'}
+                    {currentRoom.roomType === 'screen'
+                      ? currentRoom.currentState?.type === 'screen' ? '房主正在共享屏幕' : '等待房主开始共享'
+                      : currentRoom.currentState ? '房主正在播放' : '等待房主开始播放'}
                   </h3>
                   <p className="text-sm text-white/80">
                     房间: {currentRoom.name} | 房主: {currentRoom.ownerName}
@@ -246,12 +269,14 @@ export default function WatchRoomPage() {
                     <p className="text-xs text-white/90 mt-1">
                       {currentRoom.currentState.type === 'play'
                         ? `${currentRoom.currentState.videoName || '未知视频'}`
-                        : `${currentRoom.currentState.channelName || '未知频道'}`}
+                        : currentRoom.currentState.type === 'live'
+                          ? `${currentRoom.currentState.channelName || '未知频道'}`
+                          : '屏幕共享进行中'}
                     </p>
                   )}
                   {!currentRoom.currentState && (
                     <p className="text-xs text-white/70 mt-1">
-                      当房主开始播放时，您将自动跟随
+                      {currentRoom.roomType === 'screen' ? '当房主开始共享时，您将自动进入共享页' : '当房主开始播放时，您将自动跟随'}
                     </p>
                   )}
                 </div>
@@ -280,6 +305,8 @@ export default function WatchRoomPage() {
                         // 普通 live 格式，导航到 live 页面
                         router.push(`/live?id=${state.channelId}`);
                       }
+                    } else if (state.type === 'screen') {
+                      router.push('/watch-room/screen');
                     }
                   }}
                   className="px-6 py-2 bg-white text-blue-600 font-medium rounded-lg hover:bg-white/90 transition-colors whitespace-nowrap"
@@ -303,7 +330,7 @@ export default function WatchRoomPage() {
             )}
           </h1>
           <p className="text-sm text-gray-600 dark:text-gray-400 mt-1">
-            与好友一起看视频，实时同步播放
+            与好友一起看视频，支持进度同步或屏幕共享
           </p>
         </div>
 
@@ -360,7 +387,7 @@ export default function WatchRoomPage() {
                         )}
                       </div>
 
-                      <div className="grid grid-cols-2 gap-4 mt-4">
+                      <div className="grid grid-cols-1 sm:grid-cols-3 gap-4 mt-4">
                         <div className="bg-white/10 backdrop-blur rounded-lg p-3">
                           <p className="text-blue-100 text-xs mb-1">房间号</p>
                           <p className="text-xl font-mono font-bold">{currentRoom.id}</p>
@@ -369,6 +396,10 @@ export default function WatchRoomPage() {
                           <p className="text-blue-100 text-xs mb-1">成员数</p>
                           <p className="text-xl font-bold">{members.length} 人</p>
                         </div>
+                        <div className="bg-white/10 backdrop-blur rounded-lg p-3">
+                          <p className="text-blue-100 text-xs mb-1">房间类型</p>
+                          <p className="text-base font-bold">{currentRoom.roomType === 'screen' ? '屏幕共享' : '进度同步'}</p>
+                        </div>
                       </div>
                     </div>
 
@@ -402,7 +433,9 @@ export default function WatchRoomPage() {
                     {/* 提示信息 */}
                     <div className="bg-blue-50 dark:bg-blue-900/20 rounded-lg p-4 border border-blue-200 dark:border-blue-800">
                       <p className="text-sm text-blue-800 dark:text-blue-200">
-                        💡 前往播放页面或直播页面开始观影，房间成员将自动同步您的操作
+                        💡 {currentRoom.roomType === 'screen'
+                          ? '这是屏幕共享房间，创建后将进入共享页，由房主发起屏幕共享'
+                          : '前往播放页面或直播页面开始观影，房间成员将自动同步您的操作'}
                       </p>
                     </div>
                   </div>
@@ -471,6 +504,38 @@ export default function WatchRoomPage() {
                     </label>
                   </div>
 
+                  <div>
+                    <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
+                      房间类型
+                    </label>
+                    <div className="grid grid-cols-1 sm:grid-cols-2 gap-3">
+                      <button
+                        type="button"
+                        onClick={() => setCreateForm({ ...createForm, roomType: 'sync' })}
+                        className={`rounded-lg border p-4 text-left transition-colors ${
+                          createForm.roomType === 'sync'
+                            ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20'
+                            : 'border-gray-300 dark:border-gray-600'
+                        }`}
+                      >
+                        <div className="font-medium text-gray-900 dark:text-gray-100">进度同步</div>
+                        <div className="mt-1 text-sm text-gray-600 dark:text-gray-400">统一播放进度</div>
+                      </button>
+                      <button
+                        type="button"
+                        onClick={() => setCreateForm({ ...createForm, roomType: 'screen' })}
+                        className={`rounded-lg border p-4 text-left transition-colors ${
+                          createForm.roomType === 'screen'
+                            ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20'
+                            : 'border-gray-300 dark:border-gray-600'
+                        }`}
+                      >
+                        <div className="font-medium text-gray-900 dark:text-gray-100">屏幕共享</div>
+                        <div className="mt-1 text-sm text-gray-600 dark:text-gray-400">房员直接观看房主共享的浏览器画面</div>
+                      </button>
+                    </div>
+                  </div>
+
                   <button
                     type="submit"
                     disabled={createLoading || !createForm.roomName.trim()}
@@ -486,7 +551,7 @@ export default function WatchRoomPage() {
               {!currentRoom && (
                 <div className="mt-6 bg-blue-50 dark:bg-blue-900/20 rounded-lg p-4 border border-blue-200 dark:border-blue-800">
                   <p className="text-sm text-blue-800 dark:text-blue-200">
-                    <strong>提示：</strong>创建房间后，您将成为房主。所有成员的播放进度将自动跟随您的操作。
+                    <strong>提示：</strong>创建房间后，您将成为房主。进度同步房会跟随播放状态，屏幕共享房会进入独立共享页。
                   </p>
                 </div>
               )}
@@ -518,7 +583,7 @@ export default function WatchRoomPage() {
                         )}
                       </div>
 
-                      <div className="grid grid-cols-2 gap-4 mt-4">
+                      <div className="grid grid-cols-1 sm:grid-cols-3 gap-4 mt-4">
                         <div className="bg-white/10 backdrop-blur rounded-lg p-3">
                           <p className="text-green-100 text-xs mb-1">房间号</p>
                           <p className="text-xl font-mono font-bold">{currentRoom.id}</p>
@@ -527,6 +592,10 @@ export default function WatchRoomPage() {
                           <p className="text-green-100 text-xs mb-1">成员数</p>
                           <p className="text-xl font-bold">{members.length} 人</p>
                         </div>
+                        <div className="bg-white/10 backdrop-blur rounded-lg p-3">
+                          <p className="text-green-100 text-xs mb-1">房间类型</p>
+                          <p className="text-base font-bold">{currentRoom.roomType === 'screen' ? '屏幕共享' : '进度同步'}</p>
+                        </div>
                       </div>
                     </div>
 
@@ -560,7 +629,9 @@ export default function WatchRoomPage() {
                     {/* 提示信息 */}
                     <div className="bg-green-50 dark:bg-green-900/20 rounded-lg p-4 border border-green-200 dark:border-green-800">
                       <p className="text-sm text-green-800 dark:text-green-200">
-                        💡 {isOwner ? '前往播放页面或直播页面开始观影，房间成员将自动同步您的操作' : '等待房主开始播放，您的播放进度将自动跟随房主'}
+                        💡 {currentRoom.roomType === 'screen'
+                          ? '这是屏幕共享房间，进入后即可观看房主共享画面'
+                          : isOwner ? '前往播放页面或直播页面开始观影，房间成员将自动同步您的操作' : '等待房主开始播放，您的播放进度将自动跟随房主'}
                       </p>
                     </div>
                   </div>
@@ -617,7 +688,7 @@ export default function WatchRoomPage() {
               {!currentRoom && (
                 <div className="mt-6 bg-green-50 dark:bg-green-900/20 rounded-lg p-4 border border-green-200 dark:border-green-800">
                   <p className="text-sm text-green-800 dark:text-green-200">
-                    <strong>提示：</strong>加入房间后，您的播放进度将自动跟随房主的操作。
+                    <strong>提示：</strong>加入进度同步房后将跟随播放，加入屏幕共享房后会进入共享页面。
                   </p>
                 </div>
               )}
@@ -633,7 +704,7 @@ export default function WatchRoomPage() {
                   找到 <span className="font-medium text-gray-900 dark:text-gray-100">{rooms.length}</span> 个公开房间
                 </p>
                 <button
-                  onClick={loadRooms}
+                  onClick={() => loadRooms(true)}
                   disabled={loading}
                   className="flex items-center gap-2 px-4 py-2 bg-gray-100 dark:bg-gray-700 hover:bg-gray-200 dark:hover:bg-gray-600 rounded-lg text-gray-700 dark:text-gray-300 transition-colors disabled:opacity-50"
                 >
@@ -704,6 +775,10 @@ export default function WatchRoomPage() {
                           <span>房主</span>
                           <span className="font-medium">{room.ownerName}</span>
                         </div>
+                        <div className="flex items-center justify-between text-gray-600 dark:text-gray-400">
+                          <span>类型</span>
+                          <span>{room.roomType === 'screen' ? '屏幕共享' : '进度同步'}</span>
+                        </div>
                         <div className="flex items-center justify-between text-gray-600 dark:text-gray-400">
                           <span>创建时间</span>
                           <span>{formatTime(room.createdAt)}</span>
@@ -713,7 +788,9 @@ export default function WatchRoomPage() {
                             <p className="text-xs text-blue-700 dark:text-blue-300 truncate">
                               {room.currentState.type === 'play'
                                 ? `正在播放: ${room.currentState.videoName}`
-                                : `正在观看: ${room.currentState.channelName}`}
+                                : room.currentState.type === 'live'
+                                  ? `正在观看: ${room.currentState.channelName}`
+                                  : '正在共享屏幕'}
                             </p>
                           </div>
                         )}

src/app/watch-room/screen/page.tsx

@@ -0,0 +1,201 @@
+'use client';
+
+import { Monitor, MonitorPlay, Users } from 'lucide-react';
+import Link from 'next/link';
+import { useRouter } from 'next/navigation';
+import { useEffect } from 'react';
+
+import { useWatchRoomContext } from '@/components/WatchRoomProvider';
+import { useScreenShare } from '@/hooks/useScreenShare';
+
+const NEW_TAB_KEY_PREFIX = 'watch_room_screen_home_opened_';
+
+export default function WatchRoomScreenPage() {
+  const router = useRouter();
+  const watchRoom = useWatchRoomContext();
+  const { currentRoom, members, leaveRoom } = watchRoom;
+  const {
+    currentRoom: screenRoom,
+    isOwner,
+    isSharing,
+    isStarting,
+    error,
+    localVideoRef,
+    remoteVideoRef,
+    startSharing,
+    stopSharing,
+  } = useScreenShare();
+
+  useEffect(() => {
+    if (!currentRoom) {
+      router.replace('/watch-room');
+      return;
+    }
+
+    if (currentRoom.roomType !== 'screen') {
+      router.replace('/watch-room');
+    }
+  }, [currentRoom, router]);
+
+  useEffect(() => {
+    if (!screenRoom || !isOwner) return;
+
+    const key = `${NEW_TAB_KEY_PREFIX}${screenRoom.id}`;
+    if (sessionStorage.getItem(key)) return;
+
+    sessionStorage.setItem(key, '1');
+    window.open('/?watchRoomNoConnect=1', '_blank', 'noopener,noreferrer');
+  }, [isOwner, screenRoom?.id]);
+
+  if (!screenRoom || screenRoom.roomType !== 'screen') {
+    return null;
+  }
+
+  const handleLeave = () => {
+    if (isOwner && isSharing) {
+      stopSharing(true);
+    }
+    leaveRoom();
+    router.push('/watch-room');
+  };
+
+  return (
+    <div className='min-h-screen bg-white text-gray-900 dark:bg-black dark:text-gray-200'>
+      <div className='mx-auto flex min-h-screen max-w-7xl flex-col gap-4 px-4 py-4 lg:px-8'>
+        <div className='flex items-center justify-between gap-4 rounded-2xl border border-gray-200 bg-white/90 px-5 py-4 shadow-sm dark:border-gray-800 dark:bg-gray-900/80'>
+          <div>
+            <h1 className='flex items-center gap-2 text-2xl font-semibold'>
+              <Monitor className='h-6 w-6 text-blue-500' />
+              屏幕共享观影室
+            </h1>
+            <p className='mt-1 text-sm text-gray-600 dark:text-gray-400'>
+              房间：{screenRoom.name} · 房主：{screenRoom.ownerName}
+            </p>
+          </div>
+          <div className='flex items-center gap-2'>
+            {isOwner && (
+              <Link
+                href='/?watchRoomNoConnect=1'
+                target='_blank'
+                rel='noreferrer'
+                className='rounded-lg bg-blue-500 px-4 py-2 text-white'
+              >
+                新开主页
+              </Link>
+            )}
+            <button
+              onClick={handleLeave}
+              className='rounded-lg bg-gray-200 px-4 py-2 text-gray-900 dark:bg-gray-700 dark:text-gray-100'
+            >
+              离开房间
+            </button>
+          </div>
+        </div>
+
+        <div className='grid flex-1 grid-cols-1 gap-4 xl:grid-cols-[1fr_320px]'>
+          <div className='relative flex min-h-[420px] items-center justify-center overflow-hidden rounded-2xl border border-gray-200 bg-black dark:border-gray-800'>
+            {isOwner ? (
+              <video
+                ref={localVideoRef}
+                autoPlay
+                muted
+                playsInline
+                className='h-full w-full bg-black object-contain'
+              />
+            ) : (
+              <video
+                ref={remoteVideoRef}
+                autoPlay
+                playsInline
+                controls
+                className='h-full w-full bg-black object-contain'
+              />
+            )}
+
+            {!isSharing && (
+              <div className='absolute px-6 text-center text-white'>
+                <MonitorPlay className='mx-auto mb-3 h-12 w-12 text-white/70' />
+                <p className='text-lg font-medium'>
+                  {isOwner ? '点击开始共享，向房员推送浏览器画面' : '等待房主开始共享屏幕'}
+                </p>
+                {isOwner && (
+                  <p className='mt-2 text-sm text-white/70'>
+                    本页不要关闭；已尝试为你新开一个主页标签页方便继续浏览。
+                  </p>
+                )}
+              </div>
+            )}
+          </div>
+
+          <div className='space-y-4'>
+            <div className='rounded-xl border border-gray-200 bg-white p-4 dark:border-gray-800 dark:bg-gray-900'>
+              <h2 className='mb-3 font-semibold'>共享状态</h2>
+              <div className='space-y-2 text-sm text-gray-600 dark:text-gray-400'>
+                <p>类型：屏幕共享</p>
+                <p>状态：{isSharing ? '共享中' : '未开始'}</p>
+                <p>成员：{members.length} 人</p>
+              </div>
+
+              {error && (
+                <div className='mt-3 rounded-lg border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-700 dark:border-red-800 dark:bg-red-900/20 dark:text-red-300'>
+                  {error}
+                </div>
+              )}
+
+              <div className='mt-4 flex gap-3'>
+                {isOwner ? (
+                  <>
+                    <button
+                      onClick={() => startSharing()}
+                      disabled={isStarting || isSharing}
+                      className='flex-1 rounded-lg bg-blue-500 px-4 py-2 text-white disabled:bg-gray-400'
+                    >
+                      {isStarting ? '启动中...' : isSharing ? '共享中' : '开始共享'}
+                    </button>
+                    <button
+                      onClick={() => stopSharing(true)}
+                      disabled={!isSharing}
+                      className='rounded-lg bg-red-500 px-4 py-2 text-white disabled:bg-gray-400'
+                    >
+                      停止
+                    </button>
+                  </>
+                ) : (
+                  <div className='rounded-lg bg-blue-50 px-3 py-2 text-sm text-blue-700 dark:bg-blue-900/20 dark:text-blue-300'>
+                    房员无需操作，房主开始共享后会自动显示画面。
+                  </div>
+                )}
+              </div>
+            </div>
+
+            <div className='rounded-xl border border-gray-200 bg-white p-4 dark:border-gray-800 dark:bg-gray-900'>
+              <h2 className='mb-3 flex items-center gap-2 font-semibold'>
+                <Users className='h-4 w-4' />
+                房间成员
+              </h2>
+              <div className='space-y-2'>
+                {members.map((member) => (
+                  <div
+                    key={member.id}
+                    className='flex items-center justify-between rounded-lg bg-gray-50 px-3 py-2 dark:bg-gray-800/70'
+                  >
+                    <span className='text-sm'>{member.name}</span>
+                    {member.isOwner && (
+                      <span className='rounded bg-yellow-100 px-2 py-1 text-xs text-yellow-800 dark:bg-yellow-900/20 dark:text-yellow-300'>
+                        房主
+                      </span>
+                    )}
+                  </div>
+                ))}
+              </div>
+            </div>
+
+            <div className='rounded-xl border border-blue-200 bg-blue-50 p-4 text-sm text-blue-800 dark:border-blue-800 dark:bg-blue-900/20 dark:text-blue-200'>
+              本页不再包裹站点导航，便于直接共享。建议使用桌面版 Chrome / Edge，并优先共享标签页。
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/MobileBottomNav.tsx

@@ -28,6 +28,10 @@ const MobileBottomNav = ({ activePath }: MobileBottomNavProps) => {
   };
   const currentActive = activePath ?? getCurrentFullPath();
 
+  if (pathname === '/watch-room/screen') {
+    return null;
+  }
+
   const [navItems, setNavItems] = useState([
     { icon: Home, label: '首页', href: '/' },
     {

src/components/Sidebar.tsx

@@ -63,6 +63,10 @@ const Sidebar = ({ onToggle, activePath = '/' }: SidebarProps) => {
   const pathname = usePathname();
   const searchParams = useSearchParams();
   const watchRoomContext = useWatchRoomContextSafe();
+
+  if (pathname === '/watch-room/screen') {
+    return null;
+  }
   // 若同一次 SPA 会话中已经读取过折叠状态，则直接复用，避免闪烁
   const [isCollapsed, setIsCollapsed] = useState<boolean>(() => {
     if (

src/components/WatchRoomProvider.tsx

@@ -2,6 +2,7 @@
 'use client';
 
 import React, { createContext, useCallback,useContext, useEffect, useState } from 'react';
+import { useSearchParams } from 'next/navigation';
 
 import { useWatchRoom } from '@/hooks/useWatchRoom';
 
@@ -9,7 +10,7 @@ import Toast, { ToastProps } from '@/components/Toast';
 
 import { getAuthInfoFromBrowserCookie } from '@/lib/auth';
 
-import type { ChatMessage, Member, Room, WatchRoomConfig } from '@/types/watch-room';
+import type { ChatMessage, Member, Room, RoomType, ScreenState, WatchRoomConfig } from '@/types/watch-room';
 
 // Import type from watch-room-socket
 type WatchRoomSocket = import('@/lib/watch-room-socket').WatchRoomSocket;
@@ -31,6 +32,7 @@ interface WatchRoomContextType {
     description: string;
     password?: string;
     isPublic: boolean;
+    roomType: RoomType;
     userName: string;
   }) => Promise<Room>;
   joinRoom: (data: {
@@ -51,6 +53,8 @@ interface WatchRoomContextType {
   pause: () => void;
   changeVideo: (state: any) => void;
   changeLiveChannel: (state: any) => void;
+  startScreenShare: (state: ScreenState) => void;
+  stopScreenShare: () => void;
   clearRoomState: () => void;
 
   // 重连
@@ -77,6 +81,7 @@ interface WatchRoomProviderProps {
 }
 
 export function WatchRoomProvider({ children }: WatchRoomProviderProps) {
+  const searchParams = useSearchParams();
   const [config, setConfig] = useState<WatchRoomConfig | null>(null);
   const [isEnabled, setIsEnabled] = useState(false);
   const [toast, setToast] = useState<ToastProps | null>(null);
@@ -118,6 +123,7 @@ export function WatchRoomProvider({ children }: WatchRoomProviderProps) {
   }, []);
 
   const watchRoom = useWatchRoom(handleRoomDeleted, handleStateCleared);
+  const shouldDisableWatchRoomConnection = searchParams.get('watchRoomNoConnect') === '1';
 
   // 检查登录状态
   useEffect(() => {
@@ -169,6 +175,15 @@ export function WatchRoomProvider({ children }: WatchRoomProviderProps) {
 
   // 加载配置
   useEffect(() => {
+    if (shouldDisableWatchRoomConnection) {
+      setConfig({
+        enabled: false,
+        serverType: 'internal',
+      });
+      setIsEnabled(false);
+      return;
+    }
+
     const loadConfig = async () => {
       try {
         // 使用公共 API 获取观影室配置（不需要管理员权限）
@@ -253,12 +268,14 @@ export function WatchRoomProvider({ children }: WatchRoomProviderProps) {
     };
 
     loadConfig();
+  }, [isLoggedIn, shouldDisableWatchRoomConnection]); // 添加 isLoggedIn 作为依赖
 
-    // 清理
+  // 仅在 Provider 卸载时断开，避免路由切换时误断开房间连接
+  useEffect(() => {
     return () => {
       watchRoom.disconnect();
     };
-  }, [isLoggedIn]); // 添加 isLoggedIn 作为依赖
+  }, []);
 
   const contextValue: WatchRoomContextType = {
     socket: watchRoom.socket,
@@ -281,6 +298,8 @@ export function WatchRoomProvider({ children }: WatchRoomProviderProps) {
     pause: watchRoom.pause,
     changeVideo: watchRoom.changeVideo,
     changeLiveChannel: watchRoom.changeLiveChannel,
+    startScreenShare: watchRoom.startScreenShare,
+    stopScreenShare: watchRoom.stopScreenShare,
     clearRoomState: watchRoom.clearRoomState,
     manualReconnect,
   };

src/hooks/useScreenShare.ts

@@ -0,0 +1,297 @@
+'use client';
+
+import { useCallback, useEffect, useRef, useState } from 'react';
+
+import { useWatchRoomContextSafe } from '@/components/WatchRoomProvider';
+
+import type { ScreenState } from '@/types/watch-room';
+
+const iceServers = [
+  { urls: 'stun:stun.cloudflare.com:3478' },
+  { urls: 'stun:stun.l.google.com:19302' },
+  { urls: 'stun:stun1.l.google.com:19302' },
+];
+
+export function useScreenShare() {
+  const watchRoom = useWatchRoomContextSafe();
+  const localVideoRef = useRef<HTMLVideoElement | null>(null);
+  const remoteVideoRef = useRef<HTMLVideoElement | null>(null);
+  const displayStreamRef = useRef<MediaStream | null>(null);
+  const remoteStreamRef = useRef<MediaStream | null>(null);
+  const peerConnectionsRef = useRef<Map<string, RTCPeerConnection>>(new Map());
+  const stoppingRef = useRef(false);
+
+  const [error, setError] = useState<string | null>(null);
+  const [isStarting, setIsStarting] = useState(false);
+
+  const currentRoom = watchRoom?.currentRoom || null;
+  const socket = watchRoom?.socket || null;
+  const isOwner = watchRoom?.isOwner || false;
+  const members = watchRoom?.members || [];
+  const currentState = currentRoom?.currentState;
+  const isSharing = currentState?.type === 'screen' && currentState.status === 'sharing';
+
+  const closePeerConnection = useCallback((userId: string) => {
+    const pc = peerConnectionsRef.current.get(userId);
+    if (!pc) return;
+
+    pc.onicecandidate = null;
+    pc.ontrack = null;
+    pc.close();
+    peerConnectionsRef.current.delete(userId);
+  }, []);
+
+  const clearRemoteVideo = useCallback(() => {
+    remoteStreamRef.current = null;
+    if (remoteVideoRef.current) {
+      remoteVideoRef.current.srcObject = null;
+    }
+  }, []);
+
+  const cleanupSharingResources = useCallback(() => {
+    if (stoppingRef.current) return;
+    stoppingRef.current = true;
+
+    peerConnectionsRef.current.forEach((_pc, userId) => closePeerConnection(userId));
+    peerConnectionsRef.current.clear();
+
+    if (displayStreamRef.current) {
+      displayStreamRef.current.getTracks().forEach((track) => {
+        track.onended = null;
+        track.stop();
+      });
+      displayStreamRef.current = null;
+    }
+
+    if (localVideoRef.current) {
+      localVideoRef.current.srcObject = null;
+    }
+
+    clearRemoteVideo();
+    stoppingRef.current = false;
+  }, [clearRemoteVideo, closePeerConnection]);
+
+  const stopSharing = useCallback((notifyServer = true) => {
+    cleanupSharingResources();
+
+    if (notifyServer && isOwner) {
+      watchRoom?.stopScreenShare();
+    }
+  }, [cleanupSharingResources, isOwner, watchRoom]);
+
+  const createPeerConnection = useCallback((userId: string, ownerMode: boolean) => {
+    const existing = peerConnectionsRef.current.get(userId);
+    if (existing) return existing;
+
+    const pc = new RTCPeerConnection({ iceServers });
+
+    pc.onicecandidate = (event) => {
+      if (event.candidate && socket) {
+        socket.emit('screen:ice', {
+          targetUserId: userId,
+          candidate: event.candidate.toJSON(),
+        });
+      }
+    };
+
+    if (ownerMode && displayStreamRef.current) {
+      displayStreamRef.current.getTracks().forEach((track) => {
+        pc.addTrack(track, displayStreamRef.current!);
+      });
+    } else {
+      pc.ontrack = (event) => {
+        const stream = event.streams[0];
+        remoteStreamRef.current = stream;
+        if (remoteVideoRef.current) {
+          remoteVideoRef.current.srcObject = stream;
+        }
+      };
+    }
+
+    peerConnectionsRef.current.set(userId, pc);
+    return pc;
+  }, [socket]);
+
+  const sendOfferToMember = useCallback(async (memberId: string) => {
+    if (!socket || !displayStreamRef.current) return;
+
+    try {
+      const pc = createPeerConnection(memberId, true);
+      const offer = await pc.createOffer();
+      await pc.setLocalDescription(offer);
+      socket.emit('screen:offer', {
+        targetUserId: memberId,
+        offer,
+      });
+    } catch (err) {
+      console.error('[ScreenShare] Failed to send offer:', err);
+      setError('无法建立屏幕共享连接');
+    }
+  }, [createPeerConnection, socket]);
+
+  const startSharing = useCallback(async () => {
+    if (!watchRoom || !currentRoom || !isOwner) return;
+
+    setIsStarting(true);
+    setError(null);
+
+    try {
+      const stream = await navigator.mediaDevices.getDisplayMedia({
+        video: {
+          frameRate: 15,
+          width: { ideal: 1280 },
+          height: { ideal: 720 },
+        },
+        audio: true,
+      });
+
+      displayStreamRef.current = stream;
+      if (localVideoRef.current) {
+        localVideoRef.current.srcObject = stream;
+      }
+
+      const videoTrack = stream.getVideoTracks()[0];
+      if (videoTrack) {
+        videoTrack.onended = () => {
+          stopSharing(true);
+        };
+      }
+
+      const state: ScreenState = {
+        type: 'screen',
+        status: 'sharing',
+        ownerName: currentRoom.ownerName,
+        hasAudio: stream.getAudioTracks().length > 0,
+        startedAt: Date.now(),
+      };
+
+      watchRoom.startScreenShare(state);
+
+      await Promise.all(
+        members.filter((member) => !member.isOwner).map((member) => sendOfferToMember(member.id))
+      );
+    } catch (err: any) {
+      console.error('[ScreenShare] Failed to start sharing:', err);
+      setError(err?.message || '开启屏幕共享失败');
+    } finally {
+      setIsStarting(false);
+    }
+  }, [currentRoom, isOwner, members, sendOfferToMember, stopSharing, watchRoom]);
+
+  useEffect(() => {
+    if (!socket || !currentRoom) return;
+
+    const handleOffer = async (data: { userId: string; offer: RTCSessionDescriptionInit }) => {
+      if (isOwner) return;
+
+      try {
+        const pc = createPeerConnection(data.userId, false);
+        await pc.setRemoteDescription(new RTCSessionDescription(data.offer));
+        const answer = await pc.createAnswer();
+        await pc.setLocalDescription(answer);
+        socket.emit('screen:answer', {
+          targetUserId: data.userId,
+          answer,
+        });
+      } catch (err) {
+        console.error('[ScreenShare] Failed to handle offer:', err);
+        setError('接收共享画面失败');
+      }
+    };
+
+    const handleAnswer = async (data: { userId: string; answer: RTCSessionDescriptionInit }) => {
+      if (!isOwner) return;
+
+      const pc = peerConnectionsRef.current.get(data.userId);
+      if (!pc) return;
+
+      try {
+        await pc.setRemoteDescription(new RTCSessionDescription(data.answer));
+      } catch (err) {
+        console.error('[ScreenShare] Failed to handle answer:', err);
+      }
+    };
+
+    const handleIce = async (data: { userId: string; candidate: RTCIceCandidateInit }) => {
+      const pc = peerConnectionsRef.current.get(data.userId);
+      if (!pc) return;
+
+      try {
+        await pc.addIceCandidate(new RTCIceCandidate(data.candidate));
+      } catch (err) {
+        console.error('[ScreenShare] Failed to handle ICE:', err);
+      }
+    };
+
+    const handleScreenStop = () => {
+      if (!isOwner) {
+        peerConnectionsRef.current.forEach((_pc, userId) => closePeerConnection(userId));
+        peerConnectionsRef.current.clear();
+        clearRemoteVideo();
+      }
+    };
+
+    const handleViewerReady = (data: { userId: string }) => {
+      if (!isOwner || !displayStreamRef.current) return;
+      sendOfferToMember(data.userId);
+    };
+
+    socket.on('screen:offer', handleOffer);
+    socket.on('screen:answer', handleAnswer);
+    socket.on('screen:ice', handleIce);
+    socket.on('screen:stop', handleScreenStop);
+    socket.on('screen:viewer-ready', handleViewerReady);
+
+    return () => {
+      socket.off('screen:offer', handleOffer);
+      socket.off('screen:answer', handleAnswer);
+      socket.off('screen:ice', handleIce);
+      socket.off('screen:stop', handleScreenStop);
+      socket.off('screen:viewer-ready', handleViewerReady);
+    };
+  }, [clearRemoteVideo, closePeerConnection, createPeerConnection, currentRoom, isOwner, sendOfferToMember, socket]);
+
+  useEffect(() => {
+    if (!isOwner || !isSharing || !displayStreamRef.current) return;
+
+    members
+      .filter((member) => !member.isOwner)
+      .forEach((member) => {
+        if (!peerConnectionsRef.current.has(member.id)) {
+          sendOfferToMember(member.id);
+        }
+      });
+
+    Array.from(peerConnectionsRef.current.keys()).forEach((userId) => {
+      const stillInRoom = members.some((member) => member.id === userId && !member.isOwner);
+      if (!stillInRoom) {
+        closePeerConnection(userId);
+      }
+    });
+  }, [closePeerConnection, isOwner, isSharing, members, sendOfferToMember]);
+
+  useEffect(() => {
+    return () => {
+      cleanupSharingResources();
+    };
+  }, [cleanupSharingResources]);
+
+  useEffect(() => {
+    if (!socket || !currentRoom || isOwner) return;
+    if (currentState?.type !== 'screen' || currentState.status !== 'sharing') return;
+
+    socket.emit('screen:viewer-ready');
+  }, [currentRoom, currentState, isOwner, socket]);
+
+  return {
+    currentRoom,
+    isOwner,
+    isSharing,
+    isStarting,
+    error,
+    localVideoRef,
+    remoteVideoRef,
+    startSharing,
+    stopSharing,
+  };
+}

src/hooks/useWatchRoom.ts

@@ -11,6 +11,8 @@ import type {
   Member,
   PlayState,
   Room,
+  RoomType,
+  ScreenState,
   StoredRoomInfo,
   WatchRoomConfig,
 } from '@/types/watch-room';
@@ -101,7 +103,7 @@ export function useWatchRoom(
 
   // 创建房间
   const createRoom = useCallback(
-    async (data: { name: string; description: string; password?: string; isPublic: boolean; userName: string }) => {
+    async (data: { name: string; description: string; password?: string; isPublic: boolean; roomType: RoomType; userName: string }) => {
       const sock = watchRoomSocketManager.getSocket();
       if (!sock || !watchRoomSocketManager.isConnected()) {
         throw new Error('Not connected');
@@ -295,6 +297,25 @@ export function useWatchRoom(
     [isOwner]
   );
 
+  // 开始屏幕共享
+  const startScreenShare = useCallback(
+    (state: ScreenState) => {
+      const sock = watchRoomSocketManager.getSocket();
+      if (!sock || !isOwner) return;
+
+      sock.emit('screen:start', state);
+    },
+    [isOwner]
+  );
+
+  // 停止屏幕共享
+  const stopScreenShare = useCallback(() => {
+    const sock = watchRoomSocketManager.getSocket();
+    if (!sock || !isOwner) return;
+
+    sock.emit('screen:stop');
+  }, [isOwner]);
+
   // 清除房间播放状态（房主离开播放/直播页面时调用）
   const clearRoomState = useCallback(() => {
     const sock = watchRoomSocketManager.getSocket();
@@ -362,6 +383,19 @@ export function useWatchRoom(
       }
     });
 
+    // 屏幕共享事件
+    socket.on('screen:start', (state) => {
+      if (currentRoom) {
+        setCurrentRoom((prev) => (prev ? { ...prev, currentState: state } : null));
+      }
+    });
+
+    socket.on('screen:stop', () => {
+      if (currentRoom) {
+        setCurrentRoom((prev) => (prev ? { ...prev, currentState: null } : null));
+      }
+    });
+
     // 聊天事件
     socket.on('chat:message', (message) => {
       setChatMessages((prev) => [...prev, message]);
@@ -395,6 +429,8 @@ export function useWatchRoom(
       socket.off('play:update');
       socket.off('play:change');
       socket.off('live:change');
+      socket.off('screen:start');
+      socket.off('screen:stop');
       socket.off('chat:message');
       socket.off('state:cleared');
       socket.off('connect');
@@ -431,6 +467,8 @@ export function useWatchRoom(
     pause,
     changeVideo,
     changeLiveChannel,
+    startScreenShare,
+    stopScreenShare,
     clearRoomState,
   };
 }

src/lib/watch-room-server.ts

@@ -16,6 +16,8 @@ export class WatchRoomServer {
   private rooms: Map<string, Room> = new Map();
   private members: Map<string, Map<string, Member>> = new Map(); // roomId -> userId -> Member
   private socketToRoom: Map<string, RoomMemberInfo> = new Map(); // socketId -> RoomMemberInfo
+  private screenHelpers: Map<string, string> = new Map(); // roomId -> helperSocketId
+  private helperToRoom: Map<string, string> = new Map(); // helperSocketId -> roomId
   private cleanupInterval: NodeJS.Timeout | null = null;
 
   constructor(private io: SocketIOServer<ClientToServerEvents, ServerToClientEvents>) {
@@ -40,6 +42,7 @@ export class WatchRoomServer {
             description: data.description,
             password: data.password,
             isPublic: data.isPublic,
+            roomType: data.roomType || 'sync',
             ownerId: userId,
             ownerName: data.userName,
             ownerToken: ownerToken, // 保存房主令牌
@@ -199,6 +202,111 @@ export class WatchRoomServer {
         }
       });
 
+      socket.on('screen:helper-register', (data, callback) => {
+        try {
+          const room = this.rooms.get(data.roomId);
+          if (!room) {
+            callback({ success: false, error: '房间不存在' });
+            return;
+          }
+
+          if (room.ownerToken !== data.ownerToken) {
+            callback({ success: false, error: '房主身份验证失败' });
+            return;
+          }
+
+          const oldHelperSocketId = this.screenHelpers.get(data.roomId);
+          if (oldHelperSocketId && oldHelperSocketId !== socket.id) {
+            this.helperToRoom.delete(oldHelperSocketId);
+          }
+
+          this.screenHelpers.set(data.roomId, socket.id);
+          this.helperToRoom.set(socket.id, data.roomId);
+          callback({ success: true });
+        } catch (error) {
+          console.error('[WatchRoom] Error registering screen helper:', error);
+          callback({ success: false, error: '注册共享控制窗口失败' });
+        }
+      });
+
+      socket.on('screen:start', (state) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        const roomId = roomInfo?.roomId || helperRoomId;
+        if (!roomId) return;
+        if (helperRoomId && this.screenHelpers.get(helperRoomId) !== socket.id) return;
+        if (roomInfo && !roomInfo.isOwner) return;
+
+        const room = this.rooms.get(roomId);
+        if (room) {
+          room.currentState = state;
+          this.rooms.set(roomId, room);
+          this.io.to(roomId).emit('screen:start', state);
+        }
+      });
+
+      socket.on('screen:stop', () => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        const roomId = roomInfo?.roomId || helperRoomId;
+        if (!roomId) return;
+        if (helperRoomId && this.screenHelpers.get(helperRoomId) !== socket.id) return;
+        if (roomInfo && !roomInfo.isOwner) return;
+
+        const room = this.rooms.get(roomId);
+        if (room) {
+          room.currentState = null;
+          this.rooms.set(roomId, room);
+          this.io.to(roomId).emit('screen:stop');
+        }
+      });
+
+      socket.on('screen:viewer-ready', () => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        if (!roomInfo) return;
+
+        const room = this.rooms.get(roomInfo.roomId);
+        if (!room || roomInfo.isOwner || room.currentState?.type !== 'screen') return;
+
+        const targetSocketId = this.screenHelpers.get(roomInfo.roomId) || room.ownerId;
+        this.io.to(targetSocketId).emit('screen:viewer-ready', {
+          userId: socket.id,
+        });
+      });
+
+      socket.on('screen:offer', (data) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (!roomInfo && !helperRoomId) return;
+
+        this.io.to(data.targetUserId).emit('screen:offer', {
+          userId: socket.id,
+          offer: data.offer,
+        });
+      });
+
+      socket.on('screen:answer', (data) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (!roomInfo && !helperRoomId) return;
+
+        this.io.to(data.targetUserId).emit('screen:answer', {
+          userId: socket.id,
+          answer: data.answer,
+        });
+      });
+
+      socket.on('screen:ice', (data) => {
+        const roomInfo = this.socketToRoom.get(socket.id);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (!roomInfo && !helperRoomId) return;
+
+        this.io.to(data.targetUserId).emit('screen:ice', {
+          userId: socket.id,
+          candidate: data.candidate,
+        });
+      });
+
       // 聊天消息
       socket.on('chat:message', (data) => {
         const roomInfo = this.socketToRoom.get(socket.id);
@@ -303,6 +411,19 @@ export class WatchRoomServer {
       // 断开连接
       socket.on('disconnect', () => {
         console.log(`[WatchRoom] Client disconnected: ${socket.id}`);
+        const helperRoomId = this.helperToRoom.get(socket.id);
+        if (helperRoomId) {
+          this.helperToRoom.delete(socket.id);
+          if (this.screenHelpers.get(helperRoomId) === socket.id) {
+            this.screenHelpers.delete(helperRoomId);
+            const room = this.rooms.get(helperRoomId);
+            if (room && room.currentState?.type === 'screen') {
+              room.currentState = null;
+              this.rooms.set(helperRoomId, room);
+              this.io.to(helperRoomId).emit('screen:stop');
+            }
+          }
+        }
         this.handleLeaveRoom(socket);
       });
     });
@@ -348,6 +469,11 @@ export class WatchRoomServer {
     this.io.to(roomId).emit('room:deleted');
     this.rooms.delete(roomId);
     this.members.delete(roomId);
+    const helperSocketId = this.screenHelpers.get(roomId);
+    if (helperSocketId) {
+      this.helperToRoom.delete(helperSocketId);
+      this.screenHelpers.delete(roomId);
+    }
   }
 
   // 定时清理房间（房主断开5分钟后删除）

src/types/watch-room.ts

@@ -6,15 +6,18 @@ export interface Room {
   description: string;
   password?: string;
   isPublic: boolean;
+  roomType: RoomType;
   ownerId: string;
   ownerName: string;
   ownerToken: string; // 房主令牌，用于重连时验证身份
   memberCount: number;
-  currentState: PlayState | LiveState | null;
+  currentState: PlayState | LiveState | ScreenState | null;
   createdAt: number;
   lastOwnerHeartbeat: number;
 }
 
+export type RoomType = 'sync' | 'screen';
+
 export interface Member {
   id: string;
   name: string;
@@ -42,6 +45,14 @@ export interface LiveState {
   channelUrl: string;
 }
 
+export interface ScreenState {
+  type: 'screen';
+  status: 'idle' | 'sharing';
+  ownerName: string;
+  hasAudio?: boolean;
+  startedAt?: number;
+}
+
 export interface ChatMessage {
   id: string;
   userId: string;
@@ -73,6 +84,12 @@ export interface ServerToClientEvents {
   'play:pause': () => void;
   'play:change': (state: PlayState) => void;
   'live:change': (state: LiveState) => void;
+  'screen:start': (state: ScreenState) => void;
+  'screen:stop': () => void;
+  'screen:viewer-ready': (data: { userId: string }) => void;
+  'screen:offer': (data: { userId: string; offer: RTCSessionDescriptionInit }) => void;
+  'screen:answer': (data: { userId: string; answer: RTCSessionDescriptionInit }) => void;
+  'screen:ice': (data: { userId: string; candidate: RTCIceCandidateInit }) => void;
   'chat:message': (message: ChatMessage) => void;
   'voice:offer': (data: { userId: string; offer: RTCSessionDescriptionInit }) => void;
   'voice:answer': (data: { userId: string; answer: RTCSessionDescriptionInit }) => void;
@@ -90,6 +107,7 @@ export interface ClientToServerEvents {
     description: string;
     password?: string;
     isPublic: boolean;
+    roomType: RoomType;
     userName: string;
   }, callback: (response: { success: boolean; room?: Room; error?: string }) => void) => void;
 
@@ -111,6 +129,16 @@ export interface ClientToServerEvents {
   'play:change': (state: PlayState) => void;
 
   'live:change': (state: LiveState) => void;
+  'screen:helper-register': (data: {
+    roomId: string;
+    ownerToken: string;
+  }, callback: (response: { success: boolean; error?: string }) => void) => void;
+  'screen:start': (state: ScreenState) => void;
+  'screen:stop': () => void;
+  'screen:viewer-ready': () => void;
+  'screen:offer': (data: { targetUserId: string; offer: RTCSessionDescriptionInit }) => void;
+  'screen:answer': (data: { targetUserId: string; answer: RTCSessionDescriptionInit }) => void;
+  'screen:ice': (data: { targetUserId: string; candidate: RTCIceCandidateInit }) => void;
 
   'chat:message': (data: { content: string; type: 'text' | 'emoji' }) => void;