Can't subscribe to feed if XML lacks `title` tag

[m4theushw]

Describe the bug I'm trying to subscribe to a feed but upon clicking on Subscribe the dialog closes and the feed is not added to the list of subscriptions.

To Reproduce Steps to reproduce the behavior:

1. Click on Add
2. Enter https://every.to/napkin-math/feed.xml into the feed url
3. Press Enter
4. Click on Subscribe

Expected behavior I should be able to subscribe to the feed above.

Additional context I cloned the repo and found that it's crashing when trying to insert the feed into the DB. Looking closely to the feed's XML I noticed that it lacks the title tag. Could we fallback to description or at least show an error?