BUG: Plugin store icons are blank / not loading

### Checks

- [x] I have checked that this issue has not already been reported.

- [x] I am using the latest version of Flow Launcher.

- [ ] I am using the prerelease version of Flow Launcher.

### Problem Description

Hello, I am experiencing an issue where all icons in the Flow Launcher plugin store appear completely blank. I searched existing issues and online forums but could not find a solution.

Expected Behavior: Each plugin should display its unique icon next to its name and description.
Actual Behavior:The plugin list loads, but the icon spaces are completely blank or transparent

### To Reproduce

1. Open Flow Launcher
2. Open settings and navigate to the Plugin Store
3. Scroll through the available plugins

### Screenshots

### Flow Launcher Version

2.1.3

### Windows Build Number

Microsoft Windows [Version 10.0.26200.8875]

### Error Log

```shell

Replace this line with the important log contents.

```

Reproduce the blank icons by opening Flow Launcher's Settings and navigating to the Plugin Store, then inspect the available error log and the code path that loads plugin metadata and icons. Done means each listed plugin displays its unique icon reliably on the reported Windows and Flow Launcher versions.

Written by the indexing model from the issue text.