[fix](trx-rs): correct systemd network ordering

Let the client wait for an enabled local server without activating a disabled one, and declare the socket families required by both services for configured listeners and remote connections.

Assisted-By: OpenAI Codex (GPT-5)
Signed-off-by: Stan Grams <sjg@haxx.space>

packaging/systemd/trx-server.service

@@ -18,6 +18,10 @@
 [Unit]
 Description=trx-rs radio server (CAT/SDR backend)
 Documentation=https://github.com/stanislawgrams/trx-rs
+# The server binds its control/audio TCP listeners and may connect to networked
+# rigs and reporting services, so do not start it before networking is ready.
+Wants=network-online.target
+After=network-online.target
 
 [Service]
 Type=simple
@@ -29,6 +33,9 @@ RestartSec=2
 KillSignal=SIGINT
 TimeoutStopSec=15
 NoNewPrivileges=true
+# Permit local IPC plus IPv4/IPv6 listening and outbound connections.  Ports
+# are configuration-defined, so SocketBindAllow= cannot safely narrow them.
+RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
 
 [Install]
 WantedBy=default.target