diff --git a/frontend/dcViewer.js b/frontend/dcViewer.js
index f009d5a..0d97570 100644
--- a/frontend/dcViewer.js
+++ b/frontend/dcViewer.js
@@ -4,7 +4,7 @@ const SDK_URL = "./lib/dc-camera-context.es.js?v=3";
 import { createLogo } from "./src/ui/logo.js";
 import { applyToolbarVars } from "./src/ui/toolbar.js?v=3";
 import { createTemplatesMenu } from "./src/ui/templatesMenu.js?v=3";
-import { createSettingsMenu } from "./src/ui/settingsMenu.js?v=14";
+import { createSettingsMenu } from "./src/ui/settingsMenu.js?v=15";
 import { createMeasurementModal } from "./src/ui/measurementModal.js";
 import { createGlassSelect } from "./src/ui/glassSelect.js";
 import { createColorControl } from "./src/ui/controls/color.js";
@@ -1774,6 +1774,14 @@ const initializeRuntimeMode = async () => {
     console.warn("BIM session status unavailable", err);
   }
 
+  if (shareToken) {
+    const authenticatedShare = runtimeSessionInfo.authenticated === true ||
+      startupSharePayload?.authenticated === true ||
+      startupSharePayload?.mode === "standard" ||
+      startupSharePayload?.readonly === false;
+    viewerMode = authenticatedShare ? "standard" : "guest";
+  }
+
   applyRuntimeMode();
 };
 
diff --git a/frontend/index.html b/frontend/index.html
index de4e331..077139b 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -651,6 +651,6 @@
   <input id="fileInput" class="hidden" type="file"
          accept=".xkt,.glb,.gltf,.bim,.las,.laz,.obj,.stl">
 
-  <script type="module" src="/dcViewer.js?v=55"></script>
+  <script type="module" src="/dcViewer.js?v=56"></script>
 </body>
 </html>
diff --git a/frontend/src/ui/settingsMenu.js b/frontend/src/ui/settingsMenu.js
index 9d0471b..6d1a46f 100644
--- a/frontend/src/ui/settingsMenu.js
+++ b/frontend/src/ui/settingsMenu.js
@@ -76,10 +76,13 @@ const isSharedViewerPath = () => (
   typeof window !== "undefined" &&
   /^\/share\/[^/]+\/?$/.test(window.location.pathname || "")
 );
-const isReadonlySettingsContext = () => (
-  isSharedViewerPath() ||
-  (typeof document !== "undefined" && document.body?.dataset?.viewerMode === "guest")
-);
+const isReadonlySettingsContext = () => {
+  if (typeof document !== "undefined") {
+    const mode = document.body?.dataset?.viewerMode;
+    if (mode) return mode === "guest";
+  }
+  return isSharedViewerPath();
+};
 const projectSettings = typeof window !== "undefined" && window.__BIMDC_THEME__
   ? { ...defaultSettings, ...window.__BIMDC_THEME__ }
   : { ...defaultSettings };
diff --git a/server/index.js b/server/index.js
index f3b34d4..ec736be 100644
--- a/server/index.js
+++ b/server/index.js
@@ -1531,10 +1531,15 @@ const handleGetShare = async (req, res, token) => {
         sendText(res, 404, "Share not found");
         return;
     }
+    const session = getCurrentBimSession(req);
+    const authenticated = !!session;
     sendJSON(res, 200, {
         ok: true,
-        mode: "guest",
-        readonly: true,
+        mode: authenticated ? "standard" : "guest",
+        readonly: !authenticated,
+        authenticated,
+        canShare: !BIM_AUTH_REQUIRED || authenticated,
+        user: session?.user || null,
         viewer: {
             src: publicUrlForUploadSrc(req, share.src),
             settingsSrc: publicUrlForUploadSrc(req, share.settingsSrc || share.src),