Add isSignedIn parameter and click on input field to newsletter signup tracking events

[georgerichmond]

What does this change?

• Adds isSignedIn (real auth state from useIsSignedIn()) to the value payload on every tracking event in both useNewsletterSignupForm (variant) and SecureSignup (control)
• Adds a new email-input-focused event fired on email input focus in both branches, covering the missing signed-out funnel step between VIEW and click-button
• Adds isSignedIn to the preview-open / preview-close events in NewsletterSignupCardContainer

Why?

So we can measure the impact of subsequent UX changes with better data — segmenting by sign-in state and seeing the full signed-out funnel: VIEW → email-input-focused → click-button → open-captcha → submission-confirmed.

Screenshots

No visual changes — tracking only.

[github-actions]

Deploy build 27322 of dotcom:rendering-all to CODE

All deployment options

• Deploy build 27322 of dotcom:rendering-all to CODE
• Deploy parts of build 27322 to CODE by previewing it first
• What's on CODE right now?

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From guardian/actions-riff-raff.

[gu-prout]

Seen on PROD (merged by @georgerichmond 8 minutes and 21 seconds ago) Please check your changes!