Prune commentary and stale Rust port notes

scripts/wg-setup-host.sh

@@ -83,7 +83,6 @@ ListenPort = $PORT
 PrivateKey = $(cat "$WG_DIR/server.key")
 
 [Peer]
-# phone
 PublicKey = $(cat "$PEER_DIR/phone.pub")
 AllowedIPs = $PHONE_IP/32
 EOF
@@ -99,8 +98,7 @@ PublicKey = $(cat "$WG_DIR/server.pub")
 Endpoint = $ENDPOINT:$PORT
 # Split tunnel: only the backend's subnet goes over WireGuard.
 AllowedIPs = $SUBNET
-# Keeps the mapping alive through home NAT so the backend can reach the
-# phone first (needed later for "your turn" push).
+# Keep the phone's NAT mapping reachable from the server.
 PersistentKeepalive = 25
 EOF