[Plasma 6 / Wayland] Single click actions on Gesture, Forward, and Back buttons fail on desktop/KWin

### Pre-flight checklist

- [x] I searched [existing issues](https://github.com/AprilNEA/OpenLogi/issues?q=is%3Aissue) and this is not a duplicate.
- [x] I am on the [latest release](https://github.com/AprilNEA/OpenLogi/releases/latest) or a recent `master` build.
- [x] I quit **Logi Options+** before running OpenLogi (the two apps fight over HID++ access and only one can own a receiver at a time).

### Which part of OpenLogi?

GUI (desktop app)

### OpenLogi version

0.8.3

### Operating system

Linux

### OS version & architecture

Arch Linux (KDE Plasma 6, Wayland)

### Device model

Logitech MX Master 3

### How is the device connected?

Logi Bolt receiver

### Affected area(s)

- [ ] Device discovery / detection
- [x] Button remapping
- [ ] DPI control
- [ ] SmartShift
- [ ] Per-application profiles
- [ ] Battery status
- [ ] Settings / configuration (TOML)
- [ ] Auto-update
- [ ] Menu bar / tray
- [ ] Other

### What happened?

On KDE Plasma 6 (Wayland), single-click actions on the Gesture Button, as well as the Forward (Button 5) and Back (Button 4) buttons below the thumbwheel, fail to trigger system/compositor level shortcuts (e.g., `AppExpose`, `MissionControl`, or global hotkeys). However, continuous drag gestures and thumbwheel horizontal scrolling work properly.

### Steps to reproduce

1. Running KDE Plasma 6 on Wayland with an MX Master 3.
2. Assign single-click actions to the Gesture Button, Back, or Forward buttons in `config.toml` (e.g., `Click = "AppExpose"`, `MiddleClick`, or custom shortcuts).
3. Click any of these buttons on the desktop or outside an active app window.
4. Nothing happens (KWin does not capture or process the single click event).
5. Horizontal scrolling with the thumbwheel and directional drag gestures (Up/Down/Left/Right) work as expected inside applications like web browsers.

### Diagnostics report

```markdown
Single-clicking the Gesture, Back, and Forward buttons should trigger the assigned global actions/shortcuts natively in KWin/Plasma 6 Wayland.
```

### `openlogi list` output

```text

```

### Logs

```shell

```

### macOS permissions (if applicable)

- [ ] OpenLogi has **Accessibility** permission (needed to remap buttons via the event tap).
- [ ] OpenLogi has **Input Monitoring** permission (needed for Bluetooth-direct devices and capture).

Start by reproducing the issue on KDE Plasma 6 Wayland with an MX Master 3 and the button mappings in config.toml. Trace the desktop button-remapping and event-handling path for Gesture, Back, and Forward clicks, comparing it with the working drag and horizontal-scroll actions. Done means assigned single-click actions reach KWin and trigger global shortcuts outside an active application.

Written by the indexing model from the issue text.