fix: Talk Page header image to use WMFImageWidth

[aarifsumra]

Phabricator: https://phabricator.wikimedia.org/T408859

Notes

This PR Replaces the static lead image side length with a dynamic value based on wmf_listThumbnailWidthForScale. This ensures lead images are sized appropriately for different device screens.

As mention here

This (T408859) that for the talk page header it takes a static side length of 80 and asks for the retina scale (1,2,3), so 80, 160, 240; the expectation is that will be fixed to use the standard enum sizes mentioned above.

Test Steps

1. Launch the app
2. Open Any arcticle
3. Tap on ... in the toolbar and open article talk page
4. Observe the header

Screenshots/Videos

Before	After

[aarifsumra]

Hey @l-olson1214 , I am tagging you here as I am not able to get a reviewer assigned to this PR.
I went through contributions guidelines but I have no luck in finding how to assign the @ to review so it can auto send review request to the team.

[l-olson1214]

Hey @l-olson1214 , I am tagging you here as I am not able to get a reviewer assigned to this PR. I went through contributions guidelines but I have no luck in finding how to assign the @ to review so it can auto send review request to the team.

Hey @aarifsumra ! Thank you so much for submitting, I'll bring this to the team's attention :)!

[tonisevener]

Thank you for your PR @aarifsumra! Just one minor change needed.

[tonisevener]

For this task, I only want us to modify the way the thumbnail URL is created (which you are doing correctly in your TalkPageViewModel changes). This change here increases the size of the image view itself, so that it appears larger in your screenshot. Please revert this change here so that the size of the image view is unchanged. Thanks!

[aarifsumra]

@tonisevener
I have updated the PR please review again :)

[tonisevener]

Thank you @aarifsumra!