Realtime inbox badge updates — decrement unread count when notifications are marked read

[SachinSingh008]

Fix: Realtime inbox badge updates — decrement unread count when notifications are marked read

Summary

Unread notification count in the sidebar did not decrement after opening/marking a notification as read until a full page reload. This adds a realtime refetch on notification updates so the count updates immediately.

Changes

• Add on_update to GPNotification to publish refetch_resource for Unread Notifications Count when read changes (with a safe fallback when read is set).

Rationale

• New notifications were already triggering realtime via after_insert, but marking as read had no corresponding event. Emitting a refetch on read state change keeps the badge accurate without reloads.

Testing

• Create a notification for a user; verify sidebar shows count = 1.
• Open the notification or click “Mark as read”.
• Observe the sidebar “Inbox” badge decrements to 0 without reloading.
• Repeat across multiple browser tabs; all tabs should update in realtime.

Notes

• Frontend already listens for refetch_resource and reloads Unread Notifications Count, so no UI changes were needed.
• Wrapped in try/except to avoid save failures if realtime publish fails.

[netchampfaris]

Fixed in #478