refactor: remove automatic service/task installation from Linux, macOS, and Windows setup scripts.

scripts/setup-linux.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # ZeroGravity — Linux setup
-# Creates the zerogravity-ls system user for UID-scoped iptables isolation,
-# installs the systemd user service, and builds the dns_redirect.so preload lib.
+# Checks prerequisites, creates the zerogravity-ls system user for
+# UID-scoped iptables isolation, and builds the release binary.
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
@@ -66,33 +66,7 @@ sudo chmod 1777 /tmp/zerogravity-standalone
 echo "→ Setting up ~/.config/zerogravity…"
 mkdir -p "$HOME/.config/zerogravity"
 
-# ── 6. Systemd user service ──
-echo "→ Installing systemd user service…"
-UNIT_DIR="$HOME/.config/systemd/user"
-mkdir -p "$UNIT_DIR"
-cat > "$UNIT_DIR/zerogravity.service" << EOF
-[Unit]
-Description=ZeroGravity Proxy
-After=network.target
-
-[Service]
-Type=simple
-ExecStart=$PROJECT_DIR/target/release/zerogravity
-WorkingDirectory=$PROJECT_DIR
-Environment=RUST_LOG=info
-Restart=on-failure
-RestartSec=3
-StandardOutput=journal
-StandardError=journal
-
-[Install]
-WantedBy=default.target
-EOF
-systemctl --user daemon-reload
-echo "  Installed: $UNIT_DIR/zerogravity.service"
-echo "  Enable with: systemctl --user enable zerogravity"
-
-# ── 7. Build ──
+# ── 6. Build ──
 echo "→ Building release binary…"
 cd "$PROJECT_DIR"
 cargo build --release 2>&1 | tail -1