Fix some links

[InAnYan]

• Add screenshots for AI
• Fix some links

[koppor]

Oh the link checker still reports some broken links...

[InAnYan]

I grouped my problems into 1, 2, 3.

1. I don't understand these errors:

• https://github.com/JabRef/user-documentation/actions/runs/13652182384/job/38163107186?pr=553#step:4:121 - no idea.

2. False alarms:

• https://github.com/JabRef/user-documentation/actions/runs/13652182384/job/38163107186?pr=553#step:4:147 - WTF? It works...
• https://github.com/JabRef/user-documentation/actions/runs/13652182384/job/38163107186?pr=553#step:4:158 - it works on my machine...
• https://github.com/JabRef/user-documentation/actions/runs/13652182384/job/38163107186?pr=553#step:4:128. https://translate.jabref.org/ - works perfectly, though redirects to Crowdin web-page.

3. AI redirects

In AI docs (https://github.com/JabRef/user-documentation/actions/runs/13652182384/job/38163107186?pr=553#step:4:135), these links will redirect to login page if not authorized, so also falsish alarm.

If you can/"have idea" on how to solve these errors, I can write a page about solving them in devdocs

[subhramit]

Meticulous, Ruslan!

[koppor]

I will merge - link discussion will be a follow-up. Refs https://github.com/JabRef/jabref-issue-melting-pot/issues/818.