feat(vscode): show inline diff of characters

[zhanba]

Feature

• show inline diff of characters. [VSCode] Should show inline diff when Tabby suggest changes #3422

demo:

https://jam.dev/c/164ab01c-d916-4519-8a81-b212e87c00b2

[icycodes]

Hi @zhanba
Thank you for the PR.

I created a simple snippet to test the diff decoration, but it doesn't seem to handle this case properly. Could you please take a look?

[zhanba]

Hi @zhanba Thank you for the PR.

I created a simple snippet to test the diff decoration, but it doesn't seem to handle this case properly. Could you please take a look?

Fix some decoration calculation error. For this case, we can only get below result due to limitation of the diff package.

jsdiff playground:

The monaco diff editor show a better result, I will check if we can use the monaco diff algorithm.