Hello, nice project!

I'm trying it out for myself and it seems that using a '/' character in a feed name prevent access to any url using the feed name. I know bugs should be expected, I'm sharing it just in case.

STRs:

• Add the feed https://www.reddit.com/r/selfhosted/top.rss with name /r/selfhosted
• Get a 404 on the resulting /feeds//r/selfhosted/entries page
• Can't access or delete the feed afterwards

I had to manually edit the sqlite database to fix this.

I guess you could disallow forward slashes or maybe url-encode them?