Move onboarding ToS/Privacy notice above the login CTA

[sejas]

Related issues

• Related to STU-1734
• Related to Show one-time ToS/Privacy disclaimer in Studio CLI and Studio Code #3763

How AI was used in this PR

AI was used to locate the onboarding component, move the legal notice block, and run lint/typecheck/tests.

Proposed Changes

• On the onboarding screen, the "By continuing, you agree to our Terms of Service and have read our Privacy Policy." notice was pinned to the bottom of the window, far from the actions it refers to. It now appears directly above the "Log in to WordPress.com" / "Skip" buttons, so users see the terms before continuing — matching the intent of the one-time ToS disclaimer work in Show one-time ToS/Privacy disclaimer in Studio CLI and Studio Code #3763.

Testing Instructions

• Launch Studio with a fresh profile (or reset onboarding) so the onboarding screen appears.
• Verify the ToS/Privacy notice renders above the "Log in to WordPress.com" and "Skip" buttons, and is no longer pinned at the bottom of the screen.
• Verify the Terms of Service and Privacy Policy links still open in the browser.
• Check the screen in both light and dark mode.

Before	After

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[nightnei]

LGTM 👍

[epeicher]

Thanks @sejas, I can see the ToS in the expected position for light and dark modes. LGTM!

Light	Dark

[katinthehatsite]

I pushed an empty commit to trigger CI because I did not see any other option to do it. For some reason, the Code QL action was failing.

[wpmobilebot]

📊 Performance Test Results

Comparing e65392b vs trunk

app-size

Metric	trunk	e65392b	Diff	Change
App Size (Mac)	1358.08 MB	1358.08 MB	+0.00 MB	⚪ 0.0%

site-editor

Metric	trunk	e65392b	Diff	Change
load	1681 ms	1691 ms	+10 ms	⚪ 0.0%

site-startup

Metric	trunk	e65392b	Diff	Change
siteCreation	9058 ms	9038 ms	20 ms	⚪ 0.0%
siteStartup	4398 ms	4448 ms	+50 ms	🔴 1.1%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)