style: cargo fmt over the networking-audit changes

rustfmt pass over the files the deferred-plan items touched (pinned
toolchain 1.96.0); no semantic change. cargo fmt --all --check now clean.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/punktfunk-core/src/quic/msgs.rs

@@ -2,11 +2,11 @@
 //! (`CTL_MAGIC` + type byte), including the pairing-ceremony messages. Wire codecs only
 //! — no transport state.
 
+use super::{CTL_MAGIC, MAGIC};
 use crate::config::{
     CompositorPref, Config, FecConfig, FecScheme, GamepadPref, Mode, ProtocolPhase, Role,
 };
 use crate::error::{PunktfunkError, Result};
-use super::{CTL_MAGIC, MAGIC};
 
 /// `client → host`: open the session, requesting a display mode (the host creates its
 /// virtual output at exactly this size/refresh — native resolution end to end).