Fix `extension` keymap context for single file worktree (#40425)
Closes #40353
Release Notes:
- Fixed `extension` in keymap context being empty for single file
worktree
Co-authored-by: Cole Miller <cole@zed.dev>
41994452f2Andrew Farkas committed on 10/18/2025, 2:57:59 PM· committed by GitHubparent89be263