Extract and cache article images during sync for offline viewing

Checklist

• I've already searched in existing issues and haven't found a similar feature request.

Which category best fits this feature request?

Feed Sync & Management

Is your feature request related to a problem? Please describe.

When I sync my feeds and go offline, article images are not displayed—they only load when I have an active internet connection.

This limits the usefulness of the app when reading articles offline, especially for visual content or image-rich articles.

Describe the solution you'd like

I’d like the app to download and cache article images during the feed sync process, so they’re available for offline viewing.

This feature would greatly improve the offline reading experience, especially for users who travel or use the app with limited connectivity.

It would also make the reading experience more complete and consistent.

Related links

No response

Start by tracing the feed sync process and the article image loading path in the Android app. Check how synced articles are stored and rendered while offline, then define completion as images being available after sync without an internet connection. No files or tests are named in the issue, so the relevant entry points and verification coverage must first be located.