[Bug] Clicking on sidebar notification should lead somewhere relevant.

OK so I try getting ZeroTalk. Looks like a ZeroNet reddit right? Cool. So I try to get it to start posting comments and stuff on it, but oh no, it has grown to larger than 10 MB (that's a ridiculously small default limit BTW) so it gets the "file update failed" notification in the sidebar. Well that's annoying. I try increasing the size limit on both files and sites to 100 MB. No effect.

That's a problem to chase, but **here's the real issue:** The "File update failed" notification tries to open the site when you click on it, instead of taking you to something relevant like a more detailed error message or asking you if you want to try again. That's bad UI design. Clicking on something should take you to something relevant to that thing.

Issue ではファイルもテストも特定されていません。まず sidebar の「File update failed」通知ハンドラーとクリック時の動作を特定し、次に利用可能なエラーまたは retry フローを追跡してください。通知をクリックすると、単にサイトが開くだけでなく、関連する場所に移動するようになれば完了です。

索引モデルが issue の本文から書いたものです。