Function ssh_public_key_line_from_status_lines 

pub fn ssh_public_key_line_from_status_lines(
    status_lines: &[String],
) -> Option<String>

What: Extract the first OpenSSH public key line from setup status lines.

Inputs:

• status_lines: Lines produced by run_aur_ssh_setup / validation (may include labels and hints).

Output:

• Trimmed key line (for example ssh-ed25519 AAAA... comment) when found.

Details:

• Matches lines whose trimmed text starts with ssh- (covers ssh-ed25519, ssh-rsa, etc.).