Side-by-side splits each pane to about half a laptop's width, which is too
narrow to read. Inline is GitHub's layout; compact folds the unchanged
regions away, and the gutter signs replace the pane position as the cue for
what changed. `t` and `gc` still toggle both per session.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>