## Problem

The System menu executes Reboot and Shutdown immediately after activation. Because these actions sit next to other frequently used session actions, an accidental click or key press can interrupt work without a chance to recover.

This is especially surprising in a keyboard-driven launcher, where a stray Enter can turn a navigation mistake into a destructive system action.

## Suggested behavior

Require a short, keyboard-friendly confirmation for Reboot and Shutdown when they are launched from the Omarchy menu:

- show a native shell confirmation dialog;
- select Cancel by default;
- allow Escape to cancel and arrows/Tab to change the selection;
- show a five-second countdown on the destructive action;
- execute automatically when the countdown reaches zero.

Direct calls to `omarchy system reboot` and `omarchy system shutdown` should remain immediate. This keeps scripts, terminal workflows, and internal Omarchy calls unchanged while protecting the interactive menu path.

## Why a native dialog

A shell-native dialog is consistent with the rest of the menu, keeps focus and keyboard navigation predictable, and avoids launching a temporary terminal solely for confirmation.

I have a working implementation with focused menu tests and will open a PR linked to this issue.