### System details

AMD Ryzen 7 9800X3D, NVIDIA RTX 5070 Ti, Omarchy 4.0.4 (quickshell 0.3.1, libayatana-appindicator 0.6.0)

### What's wrong?

Left-clicking the tray icon of an AppIndicator-based app does nothing. The app's menu only opens on right-click. On GNOME (AppIndicator extension) and KDE, a left-click on these icons opens the menu, so apps written for that behaviour look broken in the Omarchy bar.

**Steps to recreate**

1. Run any app that uses `libayatana-appindicator` / `libappindicator` for its tray icon (an indicator with a menu and nothing else).
2. Left-click its icon in the bar: nothing happens.
3. Right-click it: the menu opens as expected.

**Cause**

`shell/plugins/bar/widgets/Tray.qml` routes a left-click like this:

```qml
} else if (trayItemRoot.modelData.onlyMenu) {
  trayItemRoot.displayMenu(mouse)
} else {
  trayItemRoot.modelData.activate()
}
```

AppIndicator items fall into the `activate()` branch, but they cannot handle it:

- They don't export the `ItemIsMenu` property at all, so `onlyMenu` is false:

  ```
  $ busctl --user get-property :1.39 /org/ayatana/NotificationItem/io_github_otptray org.kde.StatusNotifierItem ItemIsMenu
  Failed to get property ItemIsMenu on interface org.kde.StatusNotifierItem
  ```

- `Activate` is listed on the interface but has no handler:

  ```
  $ busctl --user call :1.39 /org/ayatana/NotificationItem/io_github_otptray org.kde.StatusNotifierItem Activate ii 0 0
  Call failed: No handler for Activate
  ```

- The menu itself is exported correctly (`Menu` points at `/org/ayatana/NotificationItem/<id>/Menu` and `com.canonical.dbusmenu GetLayout` returns the full layout), which is why right-click works.

So the left-click is sent, rejected by the app, and silently dropped.

**Possible fixes**

Quickshell's `SystemTrayItem` does not report a failed `activate()` to QML, so the bar can't simply fall back to the menu the way Plasma does. Options I can see:

1. Treat AppIndicator items as menu-only. They can be recognised by their object path (`/org/ayatana/NotificationItem/...`), which the bar would have to read from `RegisteredStatusNotifierItems` on the watcher, since the tray item doesn't expose it.
2. Have Quickshell expose the activation failure (or fall back itself), then show the menu on failure.
3. Open the menu on left-click for every item that has one. Simple, but it would change apps where left-click toggles a window.

I'm happy to send a PR for whichever approach you prefer.