Bug: "Social connection not enabled" error when linking new social account in /account/security (v1.39.0)

### Describe the bug **Description:** After upgrading to v1.39.0, I tried to use the new account management feature to link a new social identity. However, I encountered an error: "Something went wrong This social sign-in method is not enabled. Please contact your administrator for assistance.", even though the connector is properly configured and enabled in the Admin Console. ### Expected behavior Expected: > Users should be able to link any social identity that is currently enabled in the system. ### How to reproduce? **Steps to Reproduce:** - Ensure a social connector (e.g., GitHub) is enabled in Logto Admin Console. - Go to the user account security page (/account/security). - Click to add/link the social account. - The error message pops up immediately or during the callback. ### Environment Logto Cloud ### Screenshots <img width="834" height="794" alt="Image" src="https://github.com/user-attachments/assets/8f6affb1-cead-464b-86e6-bc29ebbb0989" /> <img width="649" height="581" alt="Image" src="https://github.com/user-attachments/assets/22309d50-a04d-459b-b50e-27a805c96709" />