fix: solve windows build issue

internal/core/services/server_service.go

@@ -21,7 +21,6 @@ import (
 	"os"
 	"os/exec"
 	"regexp"
-	"runtime"
 	"sort"
 	"strconv"
 	"strings"
@@ -222,11 +221,9 @@ func (s *serverService) StartForward(alias string, extraArgs []string) (int, err
 	cmd.Stdin = devNull
 	cmd.Stdout = devNull
 	cmd.Stderr = devNull
-	// Set SysProcAttr conditionally to avoid Windows-only build issues
+	// Set SysProcAttr in an OS-specific way (see sysprocattr_* files)
 	sysProcAttr := &syscall.SysProcAttr{}
-	if runtime.GOOS != "windows" {
-		sysProcAttr.Setsid = true
-	}
+	setDetach(sysProcAttr)
 	cmd.SysProcAttr = sysProcAttr
 
 	if err := cmd.Start(); err != nil {

internal/core/services/sysprocattr_unix.go

@@ -0,0 +1,11 @@
+//go:build !windows
+
+package services
+
+import "syscall"
+
+// setDetach configures SysProcAttr to detach the process on non-Windows platforms.
+func setDetach(attr *syscall.SysProcAttr) {
+	// On Unix-like systems, Setsid creates a new session to fully detach.
+	attr.Setsid = true
+}

internal/core/services/sysprocattr_windows.go

@@ -0,0 +1,10 @@
+//go:build windows
+
+package services
+
+import "syscall"
+
+// setDetach is a no-op on Windows because syscall.SysProcAttr does not have Setsid.
+func setDetach(attr *syscall.SysProcAttr) {
+	// No detachment tweak needed; Windows uses different process group semantics.
+}