Add configurable menu bar from cmux.json - #4052

Bugbot Analysis Progress (7m 51s elapsed)

✅ Gathered PR context (4s)
✅ Completed bug detection (7m 39s)
✅ Posted analysis results (8s)

Final Result: Bugbot completed review - no new issues found. 1 previously reported issue remain unresolved.

Request ID: serverGenReqId_d82869c1-0ed0-4548-97aa-daa7b5cd84ef