chore: Inbox view improvements (#8866)

* chore: Inbox view improvements

* chore: Review fix

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/i18n/locale/en/inbox.json

@@ -6,6 +6,7 @@
       "LOADING": "Fetching notifications",
       "EOF": "All notifications loaded 🎉",
       "404": "There are no active notifications in this group.",
+      "NO_NOTIFICATIONS": "No notifications",
       "NOTE": "Notifications from all subscribed inboxes",
       "SNOOZED_UNTIL": "Snoozed until",
       "SNOOZED_UNTIL_TOMORROW": "Snoozed until tomorrow",