Avoid using cache when opening a file diffview after it has been unstaged

keep cursor in diff view after staging a hunk

Ensure cursor moves to a valid file after discard operation

remove useless code

Always refresh diff view after discard operation

Handle discard operation on project root

Disable signcolumn not only in Neovim but also in Vim with patch-9.2.0239+

fix changed files count not updating during incremental updates

Improve TreeView navigation and performance when removing files/directories

Improve performance by avoiding tree view rebuild when staging/unstaging a file

Use `insert_ordered_update` when creating intermediate directories

fix: pass raw buffer name to CreateBuffer()

return None when tree is empty

handle renamed files when updating staged/unstaged changes

rebuild tree view after applying patch to renamed file