diff --git a/ai-hub/app/api/routes/nodes.py b/ai-hub/app/api/routes/nodes.py
index ed97a81..e649e60 100644
--- a/ai-hub/app/api/routes/nodes.py
+++ b/ai-hub/app/api/routes/nodes.py
@@ -291,15 +291,13 @@
         return {"message": "Node preferences saved.", "nodes": prefs.model_dump()}
 
     @router.get("/preferences", response_model=schemas.UserNodePreferences, summary="Get User Node Preferences")
-    def get_node_preferences(user_id: str, db: Session = Depends(get_db)):
-        user = db.query(models.User).filter(models.User.id == user_id).first()
-        if not user:
-            raise HTTPException(status_code=404, detail="User not found.")
-        node_prefs = (user.preferences or {}).get("nodes", {})
+    def get_node_preferences(
+        db: Session = Depends(get_db),
+        current_user: models.User = Depends(get_current_user)
+    ):
+        node_prefs = (current_user.preferences or {}).get("nodes", {})
         return schemas.UserNodePreferences(**node_prefs) if node_prefs else schemas.UserNodePreferences()
 
-
-
     @router.get("/admin/{node_id}/config.yaml", response_model=schemas.NodeConfigYamlResponse, summary="[Admin] Download Node Config YAML")
     def download_node_config_yaml(node_id: str, admin_id: str = Query(...), db: Session = Depends(get_db)):
         _require_admin(admin_id, db)
@@ -938,9 +936,6 @@
     return router
 
 
-    return router
-
-
 async def _drain(q: queue.Queue, websocket: WebSocket):
     """Drain all pending queue items and send to websocket (non-blocking)."""
     while True:
diff --git a/frontend/src/services/api/apiClient.js b/frontend/src/services/api/apiClient.js
index aa7f7a6..fe33ba3 100644
--- a/frontend/src/services/api/apiClient.js
+++ b/frontend/src/services/api/apiClient.js
@@ -48,7 +48,11 @@
     let detail = `API error (${response.status})`;
     try {
       const errBody = await response.json();
-      detail = errBody.detail || detail;
+      if (errBody.detail) {
+        detail = typeof errBody.detail === 'string' 
+          ? errBody.detail 
+          : JSON.stringify(errBody.detail);
+      }
     } catch { }
     throw new Error(detail);
   }