[Desktop]文件本身过大时无法显示diff

[HelloWorldU]

What version of Kimi Code is running?

0.21.0

Which open platform/subscription were you using?

windows

Which model were you using?

No response

What platform is your computer?

No response

What issue are you seeing?

如题，当文件行数过大时，无法加载diff，是否考虑只展示有限上下文？

What steps can reproduce the bug?

skip

What is the expected behavior?

No response

Additional information

No response

Contribution

• I am willing to submit a PR for this bug fix myself (please wait for maintainer approval in this issue first)