App Icon Badge for Unread Activity

There's a feature request to display a badge (e.g. red dot) on the Seed app icon when there's unread activity, similar to Linear and Discord. Electron supports this via app.setBadgeCount() on macOS and Linux (not Windows).

Key points:

No unread count needed — just a dot is fine.

Should reflect unread items in subscribed sites, though current library limitations complicate this.

Suggests showing both: a dock icon badge and a sidebar dot.

Goal: eventually support real, personalized notifications.

Priority: Low. Feasible but requires middle-end integration.