AIChat: policy dialog shouldn't focus on anchor link

[nullhook]

currently, when the policy dialog shows, it automatically focuses on the first intractable element. we should autofocus on the primary button instead.

By default, when a dialog is opened, the first focusable element within the dialog will receive focus unless a different element within the dialog has the autofocus attribute set

[stephendonner]

[mattmcalister]

This copy is changing, and anything you do here will be overwritten by this #35355. I'm closing this as a dupe.

[yrliou]

I'm re-opening this because the text change won't fix this, it still focused on the first anchor link.

[nullhook]

The issue I'm describing here is an underlying problem with Nala's modal component, and even with the new copy change, it still persists. The new copy change places an anchor link first in the content flow, followed by the primary button. This issue describes exactly that; ideally, the focus should be on the button.

[mattmcalister]

Oh, ok. That makes sense.

[stephendonner]

Verified PASSED using

Brave | 1.65.79 Chromium: 123.0.6312.29 (Official Build) nightly (64-bit)
-- | --
Revision | 9c6d737e50d926561b759189043cf63065fe5cc6
OS | Windows 10 Version 22H2 (Build 19045.4170)

Steps:

1. installed 1.65.79
2. launched Brave
3. clicked on Leo in the sidebar
4. confirmed opt-in text with link

Confirmed the Brave wiki link doesn't have focus; the Submit button does

example	example	example	example

[stephendonner]

Verified PASSED using

Brave	1.65.88 Chromium: 123.0.6312.58 (Official Build) beta (x86_64) 
Revision	e260e641e7db9e88b9b51112f4f00febf5a2f5eb
OS	macOS Version 11.7.10 (Build 20G1427)

example	example	example