[Bug]: 0.7.10 dev package does not install a proper launcher

### 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

openlogi 0.7.10

### Operating system

Linux

### OS version & architecture

Deepin 25.2.1

### Device model

Logitech G502 HERO Gaming Mouse

### How is the device connected?

Wired (USB cable)

### Affected area(s)

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

### What happened?

After installing the latest `deb` package, the software launcher does not show its icon properly.

### Steps to reproduce

1. Install the `dev` package.
2. Check the launcher.
3. See the missing icon.

### Diagnostics report

```markdown

```

### `openlogi list` output

```text
❯ openlogi list
(no agent reachable — reading hardware directly; macOS judges this process's Input Monitoring grant, not the agent's)
Logitech G502 HERO Gaming Mouse (—, vid=046d pid=c08b)
└─ slot 255 ● G502 HERO Gaming Mouse (mouse, wpid=?, battery=—)
model_ids=[c08b,0000,0000] ext=00 serial=— unit_id=94006500 transports=usb
```

### 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 missing-icon behavior with the OpenLogi 0.7.10 dev deb package on Linux, then inspect the package's desktop launcher and icon metadata. Done means the installed application appears in the launcher with its proper icon; no specific source file or test is named in the issue.

Written by the indexing model from the issue text.