NetworkOnMainThreadException trying to download podcast

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Checklist

• I am using the latest version (0.4.2)
• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• This issue contains only one bug. I will open one issue for every bug report I want to file.

Steps to reproduce the bug

1. In stand-alone mode, import https://vkc.sh/feed/podcast
2. Refresh. A podcast entry shows up
3. Click the "download" button

Actual behavior

An error message appears with a NetworkOnMainThreadException, and the podcast content is not downloaded.

Expected behavior

The podcast would download and play.

Screenshots/Screen recordings

Logs

If you saw an error dialog, the app might add some data to Settings -> Logs. You can click on that error and copy its stack trace here.

There is no such log viewer in Settings.

Device info

• Android version: stock Samsung One // Android 13
• Device model: Samsung Galaxy Z Flip3