[pike00]

Summary

• Add exact intraline emphasis for paired deletion/addition lines.
• Replace raw unified-diff hunk headers with readable @ path:line @ context headers.
• Preserve syntax highlighting, Unicode code points, line selection, fingerprints, and review anchors.
• Normalize the demo fixture and add Playwright coverage for emphasis, headers, and line selection.
• Add a forced-colors underline fallback for accessibility.

Verification

• npm test: 151 server tests and 66 web tests passed.
• npm run typecheck: passed.
• npm run build: passed.
• npm run test:e2e: 8 tests passed.
• Independent task and whole-branch reviews approved.

Notes

The diff-so-fancy terminal renderer is not bundled or invoked. Wingdiff keeps Git's structured diff authoritative and applies the presentation improvements natively in React.

[HartBrook]

Looks good