Sync BIM login state and stabilize zoom

frontend/dcViewer.js

@@ -447,9 +447,10 @@ const configureCameraControl = () => {
   if (!control) return;
   activeZoomSpeed = normalizeZoomSpeed(activeZoomSpeed);
   configureCameraPanMap(control);
-  control.followPointer = true;
+  // Keep wheel dolly speed independent from whether the pointer is over model geometry.
+  control.followPointer = false;
   control.doublePickFlyTo = false;
-  control.smartPivot = true;
+  control.smartPivot = false;
   control.zoomOnMouseWheel = true;
   control.keyboardDollyRate = CAMERA_CONTROL_SETTINGS.keyboardDollyRate;
   control.mouseWheelDollyRate = activeZoomSpeed;
@@ -684,6 +685,8 @@ let nodeDCLogoutHandling = false;
 let nodeDCLoginHandling = false;
 let nodeDCSessionWatchTimer = null;
 let nodeDCSessionWatchInFlight = false;
+let nodeDCLoginSyncPrimed = false;
+let nodeDCLoginSyncEventId = "";
 
 const handleNodeDCSessionLogout = async () => {
   if (nodeDCLogoutHandling) return;
@@ -844,9 +847,24 @@ const scheduleShareSessionPromotion = (shareToken) => {
   document.body.appendChild(iframe);
 };
 
+const getLoginSyncEventId = (sessionPayload) => (
+  typeof sessionPayload?.loginSyncEventId === "string" ? sessionPayload.loginSyncEventId : ""
+);
+
 const applyLiveSessionPayload = async (sessionPayload, { reason = "watch" } = {}) => {
   const wasAuthenticated = runtimeSessionInfo.authenticated === true;
   const isAuthenticated = sessionPayload?.authenticated === true;
+  const loginSyncEventId = getLoginSyncEventId(sessionPayload);
+  const hasNewLoginSyncEvent =
+    nodeDCLoginSyncPrimed &&
+    !isAuthenticated &&
+    !!loginSyncEventId &&
+    loginSyncEventId !== nodeDCLoginSyncEventId;
+
+  nodeDCLoginSyncPrimed = true;
+  if (loginSyncEventId) {
+    nodeDCLoginSyncEventId = loginSyncEventId;
+  }
 
   runtimeSessionInfo = {
     ...runtimeSessionInfo,
@@ -861,6 +879,10 @@ const applyLiveSessionPayload = async (sessionPayload, { reason = "watch" } = {}
       await handleNodeDCSessionLogout();
       return;
     }
+    if (hasNewLoginSyncEvent) {
+      handleNodeDCSessionLogin();
+      return;
+    }
     const shareToken = getShareTokenFromPath();
     if (shareToken && viewerMode === "guest") {
       scheduleShareSessionPromotion(shareToken);