Marrow v0.13.0

More keyboard navigation, and a fix for syntax highlighting on large diffs. This builds on the keyboard control added in v0.12.0 — press ? in any review for the full cheatsheet.

New: Hunk & note navigation, keyboard folding

• Jump by hunk: } and { move to the next and previous hunk, so you can skim a file's changes without scrolling.
• Step through AI notes: n and N cycle to the next/previous AI note in the file, scrolling it into view and briefly highlighting it (expanding its hunk first if it's collapsed).
• Fold from the keyboard: z folds or unfolds the hunk at the top of the viewport; Z collapses every hunk (or expands them all if any are already collapsed).

Fixes

• Syntax highlighting on large diffs: big or scattered diffs previously rendered as plain, uncolored text. Marrow now highlights from the complete file contents rather than the reconstructed diff, so code is colorized correctly no matter how large or spread out the change is. (Some JSX/TSX render blocks still show uncolored — a limitation of the underlying highlighter.)

Full changelog: v0.12.0...v0.13.0