[fix](trx-rs): install binaries under user home

Default installation and removal to /home/sjg/.local/bin while preserving explicit prefix and binary-directory overrides. Update the service examples and README to match.

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

README.md

@@ -126,12 +126,12 @@ script/install.sh
 ```
 
 This builds in release mode, installs `trx-server`, `trx-client`, and
-`trx-configurator` to `/usr/local/bin` (using `sudo` only if needed), seeds
+`trx-configurator` to `~/.local/bin`, seeds
 `~/.config/trx-rs/trx-rs.toml` from the example (existing config is never
 overwritten), and installs `~/.config/systemd/user/{trx-server,trx-client}.service`.
 
 ```bash
-script/install.sh --prefix ~/.local   # install to ~/.local/bin instead
+script/install.sh --prefix /opt/trx-rs # choose another installation prefix
 script/install.sh --no-sdr            # build without SoapySDR support
 script/install.sh --enable-now        # also enable + start the services now
 script/install.sh --help              # all options

packaging/systemd/trx-client.service

@@ -6,7 +6,7 @@
 #
 # Install with `script/install.sh` (which substitutes @BINDIR@ and copies this
 # into ~/.config/systemd/user/), or by hand:
-#   sed 's|@BINDIR@|/usr/local/bin|' trx-client.service \
+#   sed "s|@BINDIR@|$HOME/.local/bin|" trx-client.service \
 #     > ~/.config/systemd/user/trx-client.service
 #   systemctl --user daemon-reload
 #   systemctl --user enable --now trx-client.service

packaging/systemd/trx-server.service

@@ -6,7 +6,7 @@
 #
 # Install with `script/install.sh` (which substitutes @BINDIR@ and copies this
 # into ~/.config/systemd/user/), or by hand:
-#   sed 's|@BINDIR@|/usr/local/bin|' trx-server.service \
+#   sed "s|@BINDIR@|$HOME/.local/bin|" trx-server.service \
 #     > ~/.config/systemd/user/trx-server.service
 #   systemctl --user daemon-reload
 #   systemctl --user enable --now trx-server.service

script/install.sh

@@ -15,7 +15,7 @@ PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
 BINARIES=(trx-server trx-client trx-configurator)
 
 # --- Defaults (override via flags or environment) ---------------------------
-PREFIX="${PREFIX:-/usr/local}"
+PREFIX="${PREFIX:-$HOME/.local}"
 BINDIR="${BINDIR:-}"          # derived from PREFIX unless set explicitly
 NO_SDR=0
 DO_BUILD=1
@@ -33,7 +33,7 @@ Usage: script/install.sh [options]
 Build trx-rs (release) and install it.
 
 Options:
-  --prefix DIR     Install prefix; binaries go to DIR/bin (default: /usr/local)
+  --prefix DIR     Install prefix; binaries go to DIR/bin (default: \$HOME/.local)
   --bindir DIR     Install binaries directly to DIR (overrides --prefix)
   --no-sdr         Build without SoapySDR support (--no-default-features)
   --no-build       Skip cargo build; install existing target/release binaries

script/uninstall.sh

@@ -11,7 +11,7 @@ set -euo pipefail
 
 BINARIES=(trx-server trx-client trx-configurator)
 
-PREFIX="${PREFIX:-/usr/local}"
+PREFIX="${PREFIX:-$HOME/.local}"
 BINDIR="${BINDIR:-}"
 PURGE=0
 
@@ -23,7 +23,7 @@ usage() {
 Usage: script/uninstall.sh [options]
 
 Options:
-  --prefix DIR   Install prefix binaries were installed under (default: /usr/local)
+  --prefix DIR   Install prefix binaries were installed under (default: \$HOME/.local)
   --bindir DIR   Directory binaries were installed to (overrides --prefix)
   --purge        Also delete the user config directory ($CONFIG_DIR)
   -h, --help     Show this help