fix(web): stabilize chat timeline positioning - #5449

Bugbot Analysis Progress (6m 3s elapsed)

✅ Gathered PR context (9s)
✅ Completed bug detection (5m 49s)
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Final Result: Bugbot completed review - no new issues found! ✅

Request ID: serverGenReqId_2188faf3-2f9b-485a-911d-235082ac6b07