Show diffs below revision entries on page history, user contributions, and recent changes on demand (Community Wishlist/W402)

For years, the idea of displaying revision differences inline on pages like article history, user contributions, recent changes, and personal watchlists has been a popular request. My 2023 Community Wishlist proposal, supported by around 60 people, aimed to address this.
Inspired by existing code, I developed a user script that displays multiple diffs inline and on demand. It also makes template calls, wikilinks, and URLs clickable, and allows users to mark changes as patrolled without leaving the page. This script works well on both mobile and desktop, and users appreciate how it speeds up patrolling sequential changes without losing track, a common issue when multiple windows need to be open.
Unfortunately, user scripts are temporary fixes that can break with any interface update. A more professional, integrated solution shouldn't be difficult to implement, and it wouldn't represent any additional burden on the pages since the content is injected on demand. While I'm not a fan of the low (vertical and horizontal) information density of the list/table design in phab:T309403, its diff-injection concept looks good and is something I'd like to see implemented across all MediaWiki pages that list revisions.
Matmarex said it nicely in phab:T53958, so I'll quote: I mean, it's almost 2026. Seriously.
patrollers, administrators, rollbackers
This wish currently has 3 supporters. Voting for this wish is open until it is completed.