Support line-level review progress within a PR diff #8620
Description
Request
Please support line-level review progress within a PR diff.
Reasoning
For large changed files, file-level viewed/unviewed is too coarse. I often review a file in multiple passes and want a way to distinguish the lines I already reviewed from the lines I still need to look at.
Possible behavior
- mark selected lines or ranges as reviewed
- visually de-emphasize already-reviewed lines
- persist the state locally for the current PR / head SHA
A local-only feature would already be useful.