bug: unable to login if authentication is delegated to another CAS server

Describe the Bug

In our authentication system, we have 2 CAS servers (one for first-factor authentication, the other for MFA).
When the first factor is validated, CAS redirects to the CAS server dedicated to the second factor (with the ticket of the first CAS server in the URL), the Rocket.Chat application considers the authentication successful and avoids validating the MFA.
https://github.com/RocketChat/Rocket.Chat.ReactNative/blob/788cb8dffe02ea2e85c4b93e0a90e5f2473c7356/app/views/AuthenticationWebView.tsx#L109

https://github.com/user-attachments/assets/0a366475-b43e-4940-bf6a-b6a4466d114f

Steps to Reproduce

1. Select a Rocket.Chat server whose CAS server delegates to another CAS server
2. Validate the first authentication
   It is not possible to validate the second factor.

Expected Behavior

The Rocket.Chat mobile application should only close the AuthenticationWebView once you've arrived at the requested service.

Actual Behavior

The Rocket.Chat mobile application closes the AuthenticationWebView when a CAS ticket is found in the URL
https://github.com/RocketChat/Rocket.Chat.ReactNative/blob/788cb8dffe02ea2e85c4b93e0a90e5f2473c7356/app/views/AuthenticationWebView.tsx#L109

Rocket.Chat Server Version

7.1.0

Rocket.Chat App Version

4.67.0.107747

Device Name

Apple iPad 9

OS Version

iPadOS 18.7.2

Additional Context

No response

Start with app/views/AuthenticationWebView.tsx at the linked line and trace how the WebView handles a CAS ticket in the URL. Reproduce the delegated two-CAS flow described in the issue, then verify that the WebView remains open through second-factor authentication and closes only after reaching the requested service.