* Fix - Fix thrown error when trying to use @codebase with no buffer opened
* Style - Fix stylua formatting in repo_map and sidebar
* Fix - Restore code selection handling in sidebar
This was a mistake on my part while rushing to make the PR. I deleted an
unrelated commit that got sent by mistake, and during the second review,
I didn't notice that this important code selection functionality was
removed. The code has now been properly restored.
4976807a33