[Android 17] Can't connect over local network

I've updated my Pixel 9 to Android 17, but have noticed that Wallabag is not syncing, while on the local network.
The error is:

```
Connection test failed
Unknown error: failed to connect to wallabag.domain.com/192.168.x.xx (port 443) from /192.168.y.y (port 409010) after 10000ms
```

When not connected to my local network, everything works fine.
Also, the Wallabagger extension in Vivaldi (/Chrome) works without issue as well.

I _think_ this might be caused by the new permissions that Google added to Android 17, where you need "Local network access" (https://developer.android.com/privacy-and-security/local-network-permission) permission.

Start by reproducing the connection test and sync failure on a Pixel 9 running Android 17 while connected to the local network. Read the Android local network permission guidance linked in the issue and trace the connection-test entry point; done means local-network sync succeeds while remote-network behavior remains working.

Written by the indexing model from the issue text.