bug: Task Manager icon invisible

### Preflight checklist

- [x] I searched [existing issues](https://github.com/ja7ad/hydra/issues?q=is%3Aissue) and this is not a duplicate.
- [x] I reproduced this on the latest HYDRA release (or the current `main`).
- [x] This is not a security vulnerability.

### Component

Desktop GUI (Hydra Download Manager)

### HYDRA version

hydra 0.5.0

### Operating system

Windows (x86_64)

### OS version / distribution

Windows 10 21H2

### How did you install HYDRA?

Prebuilt archive from GitHub Releases

### What happened?

Hydra icon in Task Manager is invisible. Perhaps the icon color being white is the culprit.

### What did you expect to happen?

I expected app icon to be visible.

### Steps to reproduce

1. Run hydra.
2. Open and check Task Manager

### Logs / terminal output

```text

```

### Transfer details (for download / engine issues)

- Protocol (HTTP, HTTPS, FTP):
- Server supports range requests (`Accept-Ranges: bytes`):
- Number of connections (`-n`) and mirror sources:
- Proxy in the path (HTTP CONNECT, SOCKS4/4a/5), if any:
- File size and destination filesystem (e.g. 4 GiB onto exFAT):

### Did this work in an earlier version?

_No response_

### Contribution

- [ ] I'm willing to open a pull request for this bug.

Reproduce the invisible icon using the hydra 0.5.0 prebuilt archive on Windows 10 21H2, following the two listed steps and checking Task Manager. Start by tracing the Desktop GUI icon configuration; done means the Hydra app icon is visible in Task Manager.

Written by the indexing model from the issue text.