Fix deploy.sh: don't prompt for systemd service if already installed

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

deploy.sh

@@ -362,10 +362,12 @@ fi
 
 SERVICE_FILE="/etc/systemd/system/dataflow.service"
 
-if confirm "Systemd Service"; then
-    if [ -f "$SERVICE_FILE" ]; then
-        info "already installed"
-    else
+section "Systemd Service"
+if [ -f "$SERVICE_FILE" ]; then
+    info "already installed"
+else
+    read -p "  Not installed. Install now? (requires sudo) [y/N]: " _yn
+    if [[ "$_yn" =~ ^[Yy]$ ]]; then
         step "Installing service"
         sudo cp "$SCRIPT_DIR/dataflow.service" "$SERVICE_FILE" && ok \
             || fail "Could not install service"
@@ -373,9 +375,9 @@ if confirm "Systemd Service"; then
         step "Enabling on boot"
         sudo systemctl daemon-reload && sudo systemctl enable dataflow > /dev/null 2>&1 && ok \
             || fail "Could not enable service"
+    else
+        info "skipped"
     fi
-else
-    info "skipped"
 fi
 
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