Fix page chooser

[mgax]

Refs. #84 (comment)

chooserUrls.pageChooser has been removed in Wagtail 6.1: https://docs.wagtail.org/en/stable/releases/6.1.html#deprecation-of-window-chooserurls-within-draftail-choosers

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.44%. Comparing base (cbeff6f) to head (8e3598d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #85   +/-   ##
=======================================
  Coverage   88.44%   88.44%           
=======================================
  Files          15       15           
  Lines         753      753           
  Branches      140      140           
=======================================
  Hits          666      666           
  Misses         51       51           
  Partials       36       36           

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[Stormheg]

I'd rather see us change this to something that is inherently compatible with strict content security policies.

@mgax could you change this to use json_script instead?

[mgax]

Do you think that the patten on the above two lines is okay, i.e. setting the value on wagtailConfig? If not, I'd better change that one too.

wagtail-ab-testing/wagtail_ab_testing/templates/wagtail_ab_testing/add_form.html

Lines 35 to 36 in cbeff6f

	{% url 'wagtailadmin_home' as wagtailadmin_root_url %}
	wagtailConfig.ADMIN_ROOT_URL = '{{ wagtailadmin_root_url|escapejs }}';

[Stormheg]

Yes, changing that too would make sense now that I look at it more closely!

Checking its usage, it appears to only be used to construct a URL to fetch page information:

wagtail-ab-testing/wagtail_ab_testing/static_src/components/GoalSelector/index.tsx

Line 40 in 7e5bb95

`${wagtailConfig.ADMIN_ROOT_URL}api/main/pages/${selectedPageId}/`,

ADMIN_ROOT_URL is internal to us, there is no reference inside the (current) Wagtail codebase. No need to put this in wagtailConfig I feel.

[mgax]

Should be fixed now.

[mgax]

I'm having a hard time fixing the frontend lint error (https://github.com/wagtail-nest/wagtail-ab-testing/actions/runs/10353044821/job/28654997687?pr=85). If I run this locally:

npm ci
npm run lint

I don't get any errors. I've confirmed that I'm running Node 20.

[mgax]

I'm having a hard time fixing the frontend lint error

Fixed with help from @siimonevans (thanks!).

[Stormheg]

Great work Alex! I'm happy with this 👍