# Objective

GPUI apps currently don't have a cross-platform way to react when the
system wakes from sleep.

## Solution

Add `Application::on_system_wake`, backed by platform hooks for macOS,
Windows, and Linux. The platform listeners are registered lazily once an
app installs a wake callback.

## Testing

- N/A

## Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content adheres to Zed's UI standards
([UX/UI](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
and
[icon](https://github.com/zed-industries/zed/blob/main/crates/icons/README.md)
guidelines)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A