fix(desktop): gate darwin X_OK check behind build tag

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: joohw

core/internal/buildinfo/buildinfo.go

@@ -4,7 +4,7 @@ import "strings"
 
 // Set at link time via -ldflags (see .goreleaser.yaml).
 var (
-	Version = "dev0.1.58"
+	Version = "dev0.1.59"
 	Commit  = "none"
 	Date    = "unknown"
 )

core/internal/desktop/agents_executable_darwin.go

@@ -0,0 +1,9 @@
+//go:build darwin
+
+package desktop
+
+import "syscall"
+
+func isExecutableFile(path string) bool {
+	return syscall.Access(path, syscall.X_OK) == nil
+}

core/internal/desktop/agents_executable_unix.go

@@ -1,17 +1,10 @@
-//go:build !windows
+//go:build !windows && !darwin
 
 package desktop
 
-import (
-	"os"
-	"runtime"
-	"syscall"
-)
+import "os"
 
 func isExecutableFile(path string) bool {
-	if runtime.GOOS == "darwin" {
-		return syscall.Access(path, syscall.X_OK) == nil
-	}
 	info, err := os.Stat(path)
 	if err != nil || info.IsDir() {
 		return false