[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-client.service

@@ -18,10 +18,11 @@
 [Unit]
 Description=trx-rs radio client and web frontend
 Documentation=https://github.com/stanislawgrams/trx-rs
-# Prefer the server to be up first; it is a soft dependency so the client still
-# starts (and retries) if the server is managed separately.
-Wants=trx-server.service
-After=trx-server.service
+# Wait for networking and, when it is enabled, the local server.  After= only
+# orders units already in the transaction: it deliberately does not start a
+# disabled trx-server, since the client may connect to a remote server instead.
+Wants=network-online.target
+After=network-online.target trx-server.service
 
 [Service]
 Type=simple
@@ -32,6 +33,9 @@ RestartSec=2
 KillSignal=SIGINT
 TimeoutStopSec=15
 NoNewPrivileges=true
+# The client opens outbound TCP connections to remote servers and binds TCP
+# listeners for its configured HTTP, JSON, rigctl, and audio frontends.
+RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
 
 [Install]
 WantedBy=default.target