feat(system): enhance system architecture

internal/modules/services/services.go

@@ -3,10 +3,8 @@ package services
 import (
 	"context"
 	"encoding/json"
-	"os/exec"
 	"regexp"
 	"strings"
-	"syscall"
 
 	"nadir/internal/oscmd"
 
@@ -166,14 +164,11 @@ func isSelf(unit string) bool {
 // Returns success once the subprocess has *started* — the actual systemd
 // operation may complete after the response is sent, which is the whole point.
 func runDetached(action, unit string) (*oscmd.StatusOutput, error) {
-	cmd := exec.Command("systemctl", action, "--", unit)
-	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
-	if err := cmd.Start(); err != nil {
+	out, err := oscmd.RunDetached("systemctl", action, "--", unit)
+	if err != nil {
 		return nil, huma.Error500InternalServerError("could not start detached systemctl", err)
 	}
-	// Reap in the background so the child doesn't become a zombie.
-	go cmd.Wait()
-	return oscmd.OK(), nil
+	return out, nil
 }
 
 // validateUnit guards against empty, flag-like, or malformed unit names.