Selecting a large changed file in the review pane froze it: FileDiffPanel with
no fullText + no showLineNumbers rendered SyntaxDiff over EVERY line — a full
Shiki highlight + thousands of mounted DOM nodes — because windowing was tied to
showLineNumbers/fullText and the review call had neither.
Decouple windowing from the gutter:
- `windowed = showLineNumbers || virtualized`; windowed paths always render the
fixed-row chunked body (TokenizedDiffBody chunked / PreviewDiffRows), never
SyntaxDiff, so only visible rows mount.
- New `virtualized` prop → windowed scroller WITHOUT the line-number gutter.
- Review passes `virtualized` + the preview's fill className.
Preview (showLineNumbers + fullText) and tool-card (compact) render byte-for-byte
as before — the gutter body just reads the same chunked window it already used,
and the no-fullText+highlight case (previously SyntaxDiff) now windows too.
tsc + eslint clean. Visual paths preserved by construction; needs an in-app
eyeball on a large review diff.
Brooklyn Nicholson
5ecf06e0ed