[Turnstile] Issues with missing Form ID, server-side validation, and double rendering

[KarlKeu00]

I am encountering multiple issues when trying to use Cloudflare Turnstile with the Grav Login plugin. It appears the integration is currently broken in three specific ways:

1. Missing Form ID (JS Error) By default, the Turnstile widget does not render because the login form does not have the expected ID.
   • Error: The console reports Cannot find form #login.
   • Result: The user cannot see or interact with the captcha.
2. Validation fails/is ignored If I manually add the ID grav-login to the form container to fix the rendering issue, the widget appears. However, the server-side validation does not seem to work. Even when explicitly adding process: turnstile: true to the form definition, the form submits without correctly validating the Turnstile token.
3. Double Rendering on failed login If a login attempt fails, the page reloads and the Turnstile widget is rendered twice on the screen.