[feature request]: update active diff instantly when rewrite has changed

[alexzhang1030]

Currently, ast-grep-vscode will close all opened diff tabs when the rewrite has changed. We can follow the behavior of vscode-search to get a better UX.

Area.mp4

[HerringtonDarkholme]

It can be done but the behavior is not similar to VSCode.
VSCode replacement is computed inside JavaScript while ast-grep replacement is done via spawning new commands.

Supporting this will trigger a lot of processes when changing replacement.

[alexzhang1030]

How about updating the active diff content whenever the item is rerendered? (Rerendering refers to re-searching or changes in input/replacement.)

[alexzhang1030]

This will prevent the initiation of new processes by calculating active item diffs. Updating the diff content will be lazy, yet intuitive.