ci cross-platform fix: avoid syscall.SIGHUP usage on windows via build-tagged self-reload helper

pkg/nodes/registry_server.go

@@ -19,7 +19,6 @@ import (
 	"strconv"
 	"strings"
 	"sync"
-	"syscall"
 	"time"
 
 	cfgpkg "clawgo/pkg/config"
@@ -357,7 +356,7 @@ func (s *RegistryServer) handleWebUIConfig(w http.ResponseWriter, r *http.Reques
 		if s.onConfigAfter != nil {
 			s.onConfigAfter()
 		} else {
-			_ = syscall.Kill(os.Getpid(), syscall.SIGHUP)
+			_ = requestSelfReloadSignal()
 		}
 		_ = json.NewEncoder(w).Encode(map[string]interface{}{"ok": true, "reloaded": true})
 	default:

pkg/nodes/reload_unix.go

@@ -0,0 +1,12 @@
+//go:build !windows
+
+package nodes
+
+import (
+	"os"
+	"syscall"
+)
+
+func requestSelfReloadSignal() error {
+	return syscall.Kill(os.Getpid(), syscall.SIGHUP)
+}

pkg/nodes/reload_windows.go

@@ -0,0 +1,8 @@
+//go:build windows
+
+package nodes
+
+// requestSelfReloadSignal is a no-op on Windows (no SIGHUP semantics).
+func requestSelfReloadSignal() error {
+	return nil
+}