## Bug: Apps menu (Super+Space → Apps) shows "Nothing here yet" after switching from quickshell-git to extra/quickshell

### What happened
After an `omarchy update`, the Apps submenu of the Omarchy menu (Super+Space) is completely empty — it shows the "Nothing here yet" placeholder instead of any installed applications.

### What was expected
The Apps submenu should list all installed desktop applications, as it did before.

### System
- Omarchy: 4.0.3-1
- quickshell: 0.3.1-1 (extra/quickshell)
- Hyprland: 0.56.2
- Distro: Omarchy (Arch Linux)

### Root cause (as far as I could isolate it)

This is **not** a problem with the `.desktop` files or with Omarchy's QML config — I confirmed:

1. `~/.local/share/applications` and `/usr/share/applications` together contain 88 valid, readable `.desktop` files. `omarchy refresh applications` reports nothing missing.
2. GLib/GIO (`Gio.AppInfo.get_all()`, the standard freedesktop desktop-entry API used by most of the ecosystem) correctly enumerates 83 applications on this system.
3. Quickshell's own `DesktopEntries.applications` singleton, however, returns **0** entries. I reproduced this in complete isolation from the Omarchy shell config, with a minimal `shell.qml` launched exactly the way Omarchy launches its shell (`quickshell -n -p <dir>`):

   ```qml
   import QtQuick
   import Quickshell

   Item {
     Timer {
       interval: 4000
       running: true
       onTriggered: {
         var apps = DesktopEntries.applications.values
         console.log("APP_COUNT:", apps.length)
         Qt.quit()
       }
     }
   }
   ```

   Output: `APP_COUNT: 0`, both immediately and after a 4s delay (to rule out an async scan not finishing in time).

4. `pacman -Qkk quickshell` reports 0 altered files, and `ldd` shows all shared libraries (including `libgio-2.0.so.0`) resolve correctly — so this doesn't look like local file corruption.
5. Checking `pacman.log`, this system switched from `quickshell-git 0.3.0.r20.g28771c7-2` to `extra/quickshell 0.3.1-1` during an Omarchy update on 2026-08-28. The Quickshell process kept running in memory (with apps working) until it was restarted by a later update's Hyprland-reload hook, at which point the new 0.3.1 binary came up with an empty `DesktopEntries.applications`. `omarchy/quickshell-git` (still in Omarchy's own repo) is presumably unaffected, since this behavior lines up with the package switch.

### Steps to reproduce
1. On a system currently running `extra/quickshell 0.3.1-1`, restart the shell: `omarchy restart shell`.
2. Press Super+Space → Apps.
3. Observe: "Nothing here yet" instead of the installed application list.

### Attempted fixes that did NOT resolve it
- `omarchy refresh applications`
- `omarchy restart shell`
- Both were run before filing this report.

### Attachments
- Screenshot of the empty Apps submenu (see attached).
- Full `omarchy-debug --no-sudo --print` output available on request.