fix: user settings save issue

backend/open_webui/models/users.py

@@ -271,6 +271,24 @@ class UsersTable:
         except Exception:
             return None
 
+    def update_user_settings_by_id(self, id: str, updated: dict) -> Optional[UserModel]:
+        try:
+            with get_db() as db:
+                user_settings = db.query(User).filter_by(id=id).first().settings
+
+                if user_settings is None:
+                    user_settings = {}
+
+                user_settings.update(updated)
+
+                db.query(User).filter_by(id=id).update({"settings": user_settings})
+                db.commit()
+
+                user = db.query(User).filter_by(id=id).first()
+                return UserModel.model_validate(user)
+        except Exception:
+            return None
+
     def delete_user_by_id(self, id: str) -> bool:
         try:
             # Remove User from Groups