devhubapp/devhub ? reverse-engineered prompt

Build me an app like TweetDeck for GitHub that helps me keep up with notifications and repository activity in one place.

I want it to work on web, desktop, and mobile, with the same core experience across all of them. The main screen should use multiple columns so I can see different streams side by side, like notifications, repo activity, saved searches, and things I want to read later. Let me filter each column differently, save those searches, and mark things as done so I can get to inbox zero. It should show useful details before I open anything, like issue or pull request status and comment content.

Also include a clean dark and light theme, keyboard shortcuts, and a way to follow users or repositories without cluttering my normal GitHub notifications. If you need to look up current docs online, feel free to. Make it feel polished and fast, not like a rough prototype.