Render write_file/edit_file/patch as a reviewable diff instead of raw
result JSON, closer to a Cursor/T3 per-edit review.
- Unified diff via FileDiffPanel: strip git file-header + @@ hunk noise,
drop the +/- gutter, color by line with a 2px gutter accent, full-bleed
to the card, transparent context lines, compact scroll height.
- Header shows filename + language icon + +N/-N stats; full path moves to
a hover tooltip (no Edited verb, no ms).
- Treat the three file-edit tools uniformly (isFileEditTool); read diff
from inline_diff or patch's diff field; suppress raw-arg detail.
- Reusable FileTypeIcon primitive sharing the code-block icon mapping
(codiconForFilename), codicon fallback.
- Per-row scaffolding fade (not the group wrapper, which trapped child
opacity); expanded edits stay full, collapsed fade; keyboard-only focus
lift. Hide diff-less rehydrated creates that read as dupes.
a61baa9615