A cold push click does not mark the notification read

[HMarzban]

Problem

A push click with no open app window does not mark the notification read.

public/service-worker.js posts NOTIFICATION_CLICK only to an existing window. With no window it calls clients.openWindow(url) and posts nothing. The mark-read path in usePushNotifications.ts never runs. So the bell and the app icon badge (#258) keep the old count after a cold launch from a push.

Fix

Carry the notification_id in the opened URL (for example a query parameter), and mark it read on load. Or mark it read from the worker with the service role.

Check

Close every app window. Send a push, then click it. The pad opens, and the bell and badge drop by 1.

Part of #249.