port_forward: restore the ? the close removal left as a match

Dropping the explicit close_webrtc() from the parse-error arm left a match
that only re-spells `?`; master just reworked this function, so the branch
now leaves port_forward.rs untouched.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019aokqJuhjvB3kijXtAg5Ns

src/port_forward.rs

@@ -201,12 +201,7 @@ async fn connect_and_login(
                         received = true;
                         interface.update_received(true);
                     }
-                    let msg_in = match Message::parse_from_bytes(&bytes) {
+                    let msg_in = Message::parse_from_bytes(&bytes)?;
-                        Ok(msg) => msg,
-                        Err(err) => {
-                            return Err(err.into());
-                        }
-                    };
                     match msg_in.union {
                         Some(message::Union::Hash(hash)) => {
                             challenge = Some(hash.clone());