Fix empty git repo handling logic and fix mobile view (#33101) (#33102)

Backport #33101 and UI fix from main (including #33108)

options/locale/locale_en-US.ini

@@ -1231,6 +1231,7 @@ create_new_repo_command = Creating a new repository on the command line
 push_exist_repo = Pushing an existing repository from the command line
 empty_message = This repository does not contain any content.
 broken_message = The Git data underlying this repository cannot be read. Contact the administrator of this instance or delete this repository.
+no_branch = This repository doesn’t have any branches.
 
 code = Code
 code.desc = Access source code, files, commits and branches.