jk. Added a single streamed PR diff endpoint. Replaced per-file hydration and neighbor fetching with one streamed patch loader. Client now parses streamed git-style patches with pierre/diffs processFile, then appends real CodeView items in batches. Removed the batch files/diffs route and all hydration scroll/select logic. Diff stats still populate immediately from the manifest; skipped/binary/generated files are inserted as manifest placeholders.
