Cmd-Q causes immediate exit - yes I know it is my fault

[jmcte]

## Problem
I keep accidentally hitting Cmd+Q and quitting CodexMonitor. There’s currently no guard, so the app exits immediately.

## Desired behavior
Mimic Chrome’s macOS behavior: pressing Cmd+Q shows a prompt (e.g. “Hold Cmd+Q to quit”), and the app only quits after holding the keys for a short duration. This should prevent accidental quits while keeping an intentional path to exit.

## Steps to reproduce
1. Open CodexMonitor on macOS.
2. Press Cmd+Q.

## Actual
App exits immediately.

## Expected
App stays open unless Cmd+Q is held for a short duration (Chrome-style hold-to-quit).

[Dimillian]

Closing now:
CMD+W hide
CMD+Q quit

this is how it should be