### System details

Omarchy 4.0.0.r6691.g8b4eae6-1, Hyprland 0.56.2, Quickshell 0.3.1. Two outputs: the laptop panel and one external monitor.

### What's wrong?

Unplugging the external monitor kills every overlay built on `OverlayWindow`: the menu, the volume display, the clipboard, the emoji picker, the image picker, and reminders. The shell process keeps running, and `omarchy menu summon` still returns ok, but `hyprctl layers` has no `omarchy-menu` or `omarchy-osd` surface on either output. The bar and the background come back.

After those surfaces are mapped again on the remaining screen, the first open once focus is on the other monitor paints behind the windows. The next press, already on that monitor, paints on the overlay layer. That is the same window as #13562.

This started with #13419. `OverlayWindow` keeps one layer surface for the life of the shell. When that surface's output goes away, Hyprland closes it. Quickshell handles `zwlr_layer_surface_v1.closed` by calling `QWindow::close()`, and because a layer shell window deletes its backing window when it becomes invisible, the overlay stays unmapped. The constant `visible: true` binding is not evaluated again. Per-screen windows are unaffected: their `Variants` rebuild them when `Quickshell.screens` changes. Showing the surface in the same step that moves it onto another monitor recreates it full size on the bottom layer.

### What I recorded

Removing the external output logged:

```
monitorremoved>>DP-1
closelayer>>omarchy-background
closelayer>>omarchy-menu
closelayer>>omarchy-osd
closelayer>>omarchy-bar
openlayer>>omarchy-bar
openlayer>>omarchy-background
```

The external output was added back after that. `openlayer>>omarchy-bar` happened again. `openlayer>>omarchy-menu` and `openlayer>>omarchy-osd` did not. With both outputs connected again, layers are:

- laptop panel: `omarchy-background`, `omarchy-bar`, and the parked 1x1 clipboard, emoji, image-selector, and reminder surfaces
- external output: `omarchy-background`, `omarchy-bar`
- neither output: `omarchy-menu`, `omarchy-osd`

A later unplug of the external output, with every overlay parked on it, closed the menu, OSD, clipboard, emojis, image selector, and reminders together. Only the bar and background reopened.

### Expected

Unplugging a monitor, then plugging it back in, leaves every overlay mapped. The first open on the focused output is on the overlay layer, in front of the windows.

### Workaround

`omarchy restart shell` creates the surfaces again. The next unplug of the output an overlay last opened on kills them again.

### Fix

#13903 maps a closed overlay again after its output disappears, and moves the parked surface to the focused monitor before it is shown. That covers this report and #13562.