Release 1.4.0: macOS CLI builds and multi-platform update channel.

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

internal/update/update_windows.go

@@ -0,0 +1,50 @@
+//go:build windows
+
+package update
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"syscall"
+)
+
+// Apply downloads the new exe and schedules replacement after exit (Windows).
+func Apply(ctx context.Context, manifestURL string) (string, error) {
+	latest, _, _, exe, tmp, err := prepareDownload(ctx, manifestURL)
+	if err != nil {
+		return "", err
+	}
+	dir := filepath.Dir(exe)
+	bat := filepath.Join(dir, "navis-update.bat")
+
+	script := "@echo off\r\n" +
+		"setlocal EnableExtensions\r\n" +
+		"cd /d \"" + dir + "\"\r\n" +
+		"set \"EXE=" + exe + "\"\r\n" +
+		"set \"NEW=" + tmp + "\"\r\n" +
+		":wait\r\n" +
+		"ping -n 2 127.0.0.1 >nul\r\n" +
+		"del /f /q \"%EXE%\" >nul 2>&1\r\n" +
+		"if exist \"%EXE%\" goto wait\r\n" +
+		"move /y \"%NEW%\" \"%EXE%\" >nul\r\n" +
+		"if not exist \"%EXE%\" exit /b 1\r\n" +
+		"start \"\" \"%EXE%\"\r\n" +
+		"exit /b 0\r\n"
+	if err := os.WriteFile(bat, []byte(script), 0o755); err != nil {
+		return "", err
+	}
+
+	cmd := exec.Command("cmd.exe", "/C", bat)
+	cmd.Dir = dir
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow:    true,
+		CreationFlags: 0x00000008 | 0x00000200, // DETACHED_PROCESS | CREATE_NEW_PROCESS_GROUP
+	}
+	if err := cmd.Start(); err != nil {
+		return "", fmt.Errorf("start updater: %w", err)
+	}
+	return latest, nil
+}