fix(desktop): use X_OK access check only on darwin

Linux CI lacks syscall.X_OK; fall back to mode bits so v0.1.33 release can build.

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 = "dev0.1.57"
+	Version = "dev0.1.58"
 	Commit  = "none"
 	Date    = "unknown"
 )

core/internal/desktop/agents_executable_unix.go

@@ -2,8 +2,19 @@
 
 package desktop
 
-import "syscall"
+import (
+	"os"
+	"runtime"
+	"syscall"
+)
 
 func isExecutableFile(path string) bool {
-	return syscall.Access(path, syscall.X_OK) == nil
+	if runtime.GOOS == "darwin" {
+		return syscall.Access(path, syscall.X_OK) == nil
+	}
+	info, err := os.Stat(path)
+	if err != nil || info.IsDir() {
+		return false
+	}
+	return info.Mode().Perm()&0o111 != 0
 }