[Bug]: Horizontal scroll not working as expected

### 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

macOS

### OS version & architecture

macOS Tahoe 26.6.2

### Device model

MX Master 3

### How is the device connected?

Bluetooth (direct, no receiver)

### Affected area(s)

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

### What happened?

The thumb wheel is set to horizontal scroll but it only works on a canvas UI like Figma. Areas I see it not working (capability tested with Trackpad and with Logi Options+)
1. Dia browser sidebar profile switching
2. Mail app Horizontal scroll on list item to reveal actions
3. Browser webpage horizontal scroll

### Steps to reproduce

1. Set the thumb wheel action to horizontal scroll
2. Use it in apps mentioned

### Diagnostics report

```markdown
### OpenLogi Diagnostics

**App**
- OpenLogi (GUI): v0.8.3 (release)
- Agent: v0.8.3 (connected)
- IPC protocol: GUI 29 / agent 29
- Inventory: ready
- OS: macOS 26.6.2 (arm64)
- Locale: en-IN (UI: follow system)
- Accessibility: granted · Input hook: installed
- Launch at login: yes · Menu bar: yes · Update check: on
- Running from: source build (dev)
- Config: schema 7 · 1 configured device(s) · thumbwheel 14

**Assets**
- Source: user cache · Index: loaded (210 models) · User cache: present
- Cache path: ~/.local/share/openlogi/assets · Bundle assets: absent

**Devices (1)**
- MX Master 3 — mouse (codename: Wireless Mouse MX Master 3)
- Connection: Bluetooth (direct) · Online: yes · Battery: 50% (discharging, good)
- Capabilities: buttons=yes, pointer=yes, lighting=no
- DPI: 1050 dpi (range 200–4000, 77 steps)
- Model: 0b023 (model-ids: b023/4082/0000, ext-model: 00)
- Transports: eQuad, BTLE
- Render: mx_master_3 · direct
```

### `openlogi list` output

```text

```

### Logs

```shell

```

### macOS permissions (if applicable)

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

Reproduce on macOS with an MX Master 3 over direct Bluetooth, using the thumb wheel configured for horizontal scroll. Compare behavior in Figma with the Dia sidebar, Mail list actions, and a horizontally scrollable browser page. Done means the configured thumb wheel produces horizontal scrolling or equivalent horizontal actions consistently in the affected applications.

Written by the indexing model from the issue text.