Feature: add inline diff review panel (#609) - #4020

Bugbot Analysis Progress (2m 42s elapsed)

✅ Gathered PR context (3s)
✅ Completed bug detection (2m 28s)
✅ Posted analysis results (11s)

Final Result: Bugbot completed review - no new issues found! ✅

Request ID: serverGenReqId_9459cc70-d232-425f-b58c-cb08499123ac