Greptile Summary

This PR adds windowsHide: isWindows to the spawn options in runRestartScript (src/cli/update-cli/restart-helper.ts, line 170), explicitly suppressing the console window that cmd.exe would otherwise briefly surface when spawning the detached restart batch script on Windows.

• The fix is minimal and precisely targeted — one additional option in the existing spawn call.
• windowsHide: true on Windows tells Node.js's child_process.spawn to use the CREATE_NO_WINDOW creation flag, preventing any visible console window from appearing.
• On non-Windows platforms the value evaluates to false, which is already the default, so there is zero behavioural change on Linux/macOS.
• No security, permission, or network surface changes are introduced.

Confidence Score: 5/5

• This PR is safe to merge — it is a single-line, low-risk fix with no logic changes outside of Windows console visibility.
• The change is a one-liner that sets a well-documented Node.js spawn option (windowsHide) to true only on Windows. It has no effect on other platforms, introduces no new logic paths, and directly resolves the reported console window pop-up. There are no security, data, or network implications.
• No files require special attention.

_{Last reviewed commit: e63dd5c}