It looks like the Files tab is using a fuzzy match algo that allows n characters between matches:
This ends up being basically useless for a very common task (filter files by extension) in any project with a considerable amount of files.
I’d prefer this to just be a regex or at least have fuzzy be an option. Especially when staging large numbers of files, I feel like exact string matches are going to be far more frequently looked for than fuzzy ones.
There’s a similar thread here, but no one had replied.