diff --git a/api/repositories/workflow_collaboration_repository.py b/api/repositories/workflow_collaboration_repository.py
index 000f80496d..c6af15b434 100644
--- a/api/repositories/workflow_collaboration_repository.py
+++ b/api/repositories/workflow_collaboration_repository.py
@@ -17,6 +17,7 @@ class WorkflowSessionInfo(TypedDict):
     avatar: str | None
     sid: str
     connected_at: int
+    graph_active: bool
 
 
 class SidMapping(TypedDict):
@@ -69,6 +70,44 @@ class WorkflowCollaborationRepository:
         )
         self.refresh_session_state(workflow_id, session_info["sid"])
 
+    def get_session_info(self, workflow_id: str, sid: str) -> WorkflowSessionInfo | None:
+        raw = self._redis.hget(self.workflow_key(workflow_id), sid)
+        value = self._decode(raw)
+        if not value:
+            return None
+        try:
+            session_info = json.loads(value)
+        except (TypeError, json.JSONDecodeError):
+            return None
+
+        if not isinstance(session_info, dict):
+            return None
+        if "user_id" not in session_info or "username" not in session_info or "sid" not in session_info:
+            return None
+
+        return {
+            "user_id": str(session_info["user_id"]),
+            "username": str(session_info["username"]),
+            "avatar": session_info.get("avatar"),
+            "sid": str(session_info["sid"]),
+            "connected_at": int(session_info.get("connected_at") or 0),
+            "graph_active": bool(session_info.get("graph_active")),
+        }
+
+    def set_graph_active(self, workflow_id: str, sid: str, active: bool) -> None:
+        session_info = self.get_session_info(workflow_id, sid)
+        if not session_info:
+            return
+        session_info["graph_active"] = bool(active)
+        self._redis.hset(self.workflow_key(workflow_id), sid, json.dumps(session_info))
+        self.refresh_session_state(workflow_id, sid)
+
+    def is_graph_active(self, workflow_id: str, sid: str) -> bool:
+        session_info = self.get_session_info(workflow_id, sid)
+        if not session_info:
+            return False
+        return bool(session_info.get("graph_active") or False)
+
     def get_sid_mapping(self, sid: str) -> SidMapping | None:
         raw = self._redis.get(self.sid_key(sid))
         if not raw:
@@ -125,6 +164,7 @@ class WorkflowCollaborationRepository:
                     "avatar": session_info.get("avatar"),
                     "sid": str(session_info["sid"]),
                     "connected_at": int(session_info.get("connected_at") or 0),
+                    "graph_active": bool(session_info.get("graph_active")),
                 }
             )
 
diff --git a/api/services/workflow_collaboration_service.py b/api/services/workflow_collaboration_service.py
index 02d08fcaff..d72299592b 100644
--- a/api/services/workflow_collaboration_service.py
+++ b/api/services/workflow_collaboration_service.py
@@ -38,12 +38,13 @@ class WorkflowCollaborationService:
             "avatar": session.get("avatar"),
             "sid": sid,
             "connected_at": int(time.time()),
+            "graph_active": True,
         }
 
         self._repository.set_session_info(workflow_id, session_info)
 
         leader_sid = self.get_or_set_leader(workflow_id, sid)
-        is_leader = leader_sid == sid
+        is_leader = leader_sid == sid if leader_sid else False
 
         self._socketio.enter_room(sid, workflow_id)
         self.broadcast_online_users(workflow_id)
@@ -79,6 +80,15 @@ class WorkflowCollaborationService:
         if not event_type:
             return {"msg": "invalid event type"}, 400
 
+        if event_type == "graph_view_active":
+            is_active = False
+            if isinstance(event_data, dict):
+                is_active = bool(event_data.get("active") or False)
+            self._repository.set_graph_active(workflow_id, sid, is_active)
+            self.refresh_session_state(workflow_id, sid)
+            self.broadcast_online_users(workflow_id)
+            return {"msg": "graph_view_active_updated"}, 200
+
         self._socketio.emit(
             "collaboration_update",
             {"type": event_type, "userId": user_id, "data": event_data, "timestamp": timestamp},
@@ -100,27 +110,33 @@ class WorkflowCollaborationService:
 
         return {"msg": "graph_update_broadcasted"}, 200
 
-    def get_or_set_leader(self, workflow_id: str, sid: str) -> str:
+    def get_or_set_leader(self, workflow_id: str, sid: str) -> str | None:
         current_leader = self._repository.get_current_leader(workflow_id)
 
         if current_leader:
-            if self.is_session_active(workflow_id, current_leader):
+            if self.is_session_active(workflow_id, current_leader) and self._repository.is_graph_active(
+                workflow_id, current_leader
+            ):
                 return current_leader
             self._repository.delete_session(workflow_id, current_leader)
             self._repository.delete_leader(workflow_id)
 
-        was_set = self._repository.set_leader_if_absent(workflow_id, sid)
+        new_leader_sid = self._select_graph_leader(workflow_id, preferred_sid=sid)
+        if not new_leader_sid:
+            return None
+
+        was_set = self._repository.set_leader_if_absent(workflow_id, new_leader_sid)
 
         if was_set:
             if current_leader:
-                self.broadcast_leader_change(workflow_id, sid)
-            return sid
+                self.broadcast_leader_change(workflow_id, new_leader_sid)
+            return new_leader_sid
 
         current_leader = self._repository.get_current_leader(workflow_id)
         if current_leader:
             return current_leader
 
-        return sid
+        return new_leader_sid
 
     def handle_leader_disconnect(self, workflow_id: str, disconnected_sid: str) -> None:
         current_leader = self._repository.get_current_leader(workflow_id)
@@ -130,18 +146,18 @@ class WorkflowCollaborationService:
         if current_leader != disconnected_sid:
             return
 
-        session_sids = self._repository.get_session_sids(workflow_id)
-        if session_sids:
-            new_leader_sid = session_sids[0]
+        new_leader_sid = self._select_graph_leader(workflow_id)
+        if new_leader_sid:
             self._repository.set_leader(workflow_id, new_leader_sid)
             self.broadcast_leader_change(workflow_id, new_leader_sid)
         else:
             self._repository.delete_leader(workflow_id)
+            self.broadcast_leader_change(workflow_id, None)
 
-    def broadcast_leader_change(self, workflow_id: str, new_leader_sid: str) -> None:
+    def broadcast_leader_change(self, workflow_id: str, new_leader_sid: str | None) -> None:
         for sid in self._repository.get_session_sids(workflow_id):
             try:
-                is_leader = sid == new_leader_sid
+                is_leader = new_leader_sid is not None and sid == new_leader_sid
                 self._socketio.emit("status", {"isLeader": is_leader}, room=sid)
             except Exception:
                 logging.exception("Failed to emit leader status to session %s", sid)
@@ -167,15 +183,34 @@ class WorkflowCollaborationService:
 
     def _ensure_leader(self, workflow_id: str, sid: str) -> None:
         current_leader = self._repository.get_current_leader(workflow_id)
-        if current_leader and self.is_session_active(workflow_id, current_leader):
+        if current_leader and self.is_session_active(workflow_id, current_leader) and self._repository.is_graph_active(
+            workflow_id, current_leader
+        ):
             self._repository.expire_leader(workflow_id)
             return
 
         if current_leader:
             self._repository.delete_leader(workflow_id)
 
-        self._repository.set_leader(workflow_id, sid)
-        self.broadcast_leader_change(workflow_id, sid)
+        new_leader_sid = self._select_graph_leader(workflow_id, preferred_sid=sid)
+        if not new_leader_sid:
+            self.broadcast_leader_change(workflow_id, None)
+            return
+
+        self._repository.set_leader(workflow_id, new_leader_sid)
+        self.broadcast_leader_change(workflow_id, new_leader_sid)
+
+    def _select_graph_leader(self, workflow_id: str, preferred_sid: str | None = None) -> str | None:
+        session_sids = [
+            session["sid"]
+            for session in self._repository.list_sessions(workflow_id)
+            if session.get("graph_active")
+        ]
+        if not session_sids:
+            return None
+        if preferred_sid and preferred_sid in session_sids:
+            return preferred_sid
+        return session_sids[0]
 
     def is_session_active(self, workflow_id: str, sid: str) -> bool:
         if not sid:
diff --git a/web/app/components/workflow-app/index.tsx b/web/app/components/workflow-app/index.tsx
index a153145c76..5117dec637 100644
--- a/web/app/components/workflow-app/index.tsx
+++ b/web/app/components/workflow-app/index.tsx
@@ -18,6 +18,7 @@ import { FeaturesProvider } from '@/app/components/base/features'
 import Loading from '@/app/components/base/loading'
 import { FILE_EXTS } from '@/app/components/base/prompt-editor/constants'
 import WorkflowWithDefaultContext from '@/app/components/workflow'
+import { useCollaboration } from '@/app/components/workflow/collaboration'
 import { collaborationManager } from '@/app/components/workflow/collaboration/core/collaboration-manager'
 import {
   WorkflowContextProvider,
@@ -52,6 +53,12 @@ const SkillMain = dynamic(() => import('@/app/components/workflow/skill/main'),
   ssr: false,
 })
 
+const CollaborationSession = () => {
+  const appId = useStore(s => s.appId)
+  useCollaboration(appId || '')
+  return null
+}
+
 type WorkflowViewContentProps = {
   renderGraph: (headerLeftSlot: ReactNode) => ReactNode
   reload: () => Promise<void>
@@ -95,6 +102,20 @@ const WorkflowViewContent = ({
     }
   }, [doSetViewType, refreshGraph, syncWorkflowDraftImmediately, viewType])
 
+  useEffect(() => {
+    if (!isSupportSandbox) {
+      collaborationManager.emitGraphViewActive(true)
+      return () => {
+        collaborationManager.emitGraphViewActive(false)
+      }
+    }
+
+    collaborationManager.emitGraphViewActive(viewType === ViewType.graph)
+    return () => {
+      collaborationManager.emitGraphViewActive(false)
+    }
+  }, [isSupportSandbox, viewType])
+
   if (!isSupportSandbox)
     return renderGraph(null)
 
@@ -321,17 +342,20 @@ const WorkflowAppWithAdditionalContext = () => {
   }
 
   return (
-    <WorkflowWithDefaultContext
-      edges={edgesData}
-      nodes={nodesData}
-    >
-      <FeaturesProvider features={initialFeatures}>
-        <WorkflowViewContent
-          renderGraph={renderGraph}
-          reload={reload}
-        />
-      </FeaturesProvider>
-    </WorkflowWithDefaultContext>
+    <>
+      <CollaborationSession />
+      <WorkflowWithDefaultContext
+        edges={edgesData}
+        nodes={nodesData}
+      >
+        <FeaturesProvider features={initialFeatures}>
+          <WorkflowViewContent
+            renderGraph={renderGraph}
+            reload={reload}
+          />
+        </FeaturesProvider>
+      </WorkflowWithDefaultContext>
+    </>
   )
 }
 
diff --git a/web/app/components/workflow/collaboration/core/collaboration-manager.ts b/web/app/components/workflow/collaboration/core/collaboration-manager.ts
index 0f0546ae8c..f7690f010e 100644
--- a/web/app/components/workflow/collaboration/core/collaboration-manager.ts
+++ b/web/app/components/workflow/collaboration/core/collaboration-manager.ts
@@ -71,11 +71,13 @@ export class CollaborationManager {
   private leaderId: string | null = null
   private cursors: Record<string, CursorPosition> = {}
   private nodePanelPresence: NodePanelPresenceMap = {}
+  private onlineUsers: OnlineUser[] = []
   private activeConnections = new Set<string>()
   private isUndoRedoInProgress = false
   private pendingInitialSync = false
   private rejoinInProgress = false
   private pendingGraphImportEmit = false
+  private graphViewActive: boolean | null = null
 
   private getActiveSocket(): Socket | null {
     if (!this.currentAppId)
@@ -83,6 +85,10 @@ export class CollaborationManager {
     return webSocketClient.getSocket(this.currentAppId)
   }
 
+  setReactFlowStore(store: ReactFlowStore | null): void {
+    this.reactFlowStore = store
+  }
+
   private handleSessionUnauthorized = (): void => {
     if (this.rejoinInProgress)
       return
@@ -495,6 +501,7 @@ export class CollaborationManager {
     this.reactFlowStore = null
     this.cursors = {}
     this.nodePanelPresence = {}
+    this.onlineUsers = []
     this.isUndoRedoInProgress = false
     this.rejoinInProgress = false
 
@@ -600,11 +607,15 @@ export class CollaborationManager {
   }
 
   onCursorUpdate(callback: (cursors: Record<string, CursorPosition>) => void): () => void {
-    return this.eventEmitter.on('cursors', callback)
+    const off = this.eventEmitter.on('cursors', callback)
+    callback({ ...this.cursors })
+    return off
   }
 
   onOnlineUsersUpdate(callback: (users: OnlineUser[]) => void): () => void {
-    return this.eventEmitter.on('onlineUsers', callback)
+    const off = this.eventEmitter.on('onlineUsers', callback)
+    callback([...this.onlineUsers])
+    return off
   }
 
   onWorkflowUpdate(callback: (update: { appId: string, timestamp: number }) => void): () => void {
@@ -656,6 +667,18 @@ export class CollaborationManager {
     })
   }
 
+  emitGraphViewActive(isActive: boolean): void {
+    this.graphViewActive = isActive
+    if (!this.currentAppId || !webSocketClient.isConnected(this.currentAppId))
+      return
+
+    this.sendCollaborationEvent({
+      type: 'graph_view_active',
+      data: { active: isActive },
+      timestamp: Date.now(),
+    })
+  }
+
   onUndoRedoStateChange(callback: (state: { canUndo: boolean, canRedo: boolean }) => void): () => void {
     return this.eventEmitter.on('undoRedoStateChange', callback)
   }
@@ -1081,6 +1104,7 @@ export class CollaborationManager {
         if (data.leader && typeof data.leader === 'string')
           this.leaderId = data.leader
 
+        this.onlineUsers = data.users
         this.eventEmitter.emit('onlineUsers', data.users)
         this.eventEmitter.emit('cursors', { ...this.cursors })
       }
@@ -1115,6 +1139,8 @@ export class CollaborationManager {
     socket.on('connect', () => {
       this.eventEmitter.emit('stateChange', { isConnected: true })
       this.pendingInitialSync = true
+      if (this.graphViewActive !== null)
+        this.emitGraphViewActive(this.graphViewActive)
     })
 
     socket.on('disconnect', () => {
diff --git a/web/app/components/workflow/collaboration/hooks/use-collaboration.ts b/web/app/components/workflow/collaboration/hooks/use-collaboration.ts
index a8715d7571..4752a1edf7 100644
--- a/web/app/components/workflow/collaboration/hooks/use-collaboration.ts
+++ b/web/app/components/workflow/collaboration/hooks/use-collaboration.ts
@@ -51,7 +51,7 @@ export function useCollaboration(appId: string, reactFlowStore?: ReactFlowStore)
 
     const initCollaboration = async () => {
       try {
-        const id = await collaborationManager.connect(appId, reactFlowStore)
+        const id = await collaborationManager.connect(appId)
         if (isUnmounted) {
           collaborationManager.disconnect(id)
           return
@@ -100,7 +100,17 @@ export function useCollaboration(appId: string, reactFlowStore?: ReactFlowStore)
       if (connectionId)
         collaborationManager.disconnect(connectionId)
     }
-  }, [appId, reactFlowStore, isCollaborationEnabled])
+  }, [appId, isCollaborationEnabled])
+
+  useEffect(() => {
+    if (!reactFlowStore)
+      return
+
+    collaborationManager.setReactFlowStore(reactFlowStore)
+    return () => {
+      collaborationManager.setReactFlowStore(null)
+    }
+  }, [reactFlowStore])
 
   const prevIsConnected = useRef(false)
   useEffect(() => {
diff --git a/web/app/components/workflow/collaboration/types/collaboration.ts b/web/app/components/workflow/collaboration/types/collaboration.ts
index d94ad25759..75d6c079dc 100644
--- a/web/app/components/workflow/collaboration/types/collaboration.ts
+++ b/web/app/components/workflow/collaboration/types/collaboration.ts
@@ -62,6 +62,7 @@ export type CollaborationEventType
     | 'comments_update'
     | 'node_panel_presence'
     | 'app_publish_update'
+    | 'graph_view_active'
     | 'graph_resync_request'
     | 'workflow_restore_request'
     | 'workflow_restore_intent'