Fix the misalignment issue with Inline Assist (#43768)

Easy path to fix the issue #38755

<img width="787" height="157" alt="Screenshot 2025-11-28 at 9 39 55 PM"
src="https://github.com/user-attachments/assets/4943f668-c2d7-4c35-8fa7-a6fea839a99f"
/>

Release Notes:

- agent: Fixed the UI misalignment between old and new lines from the
inline assist.
e75e137a49Xipeng Jin committed on 11/29/2025, 2:15:19 PM· committed by GitHubparent9c593f3
1 file changedLine totals unavailable