feat(notifications): add navbar dropdown and sse client

src/locales/en.ts

@@ -391,4 +391,20 @@ export const en = {
     toFilterPrefix: "To",
   },
 
+  notifications: {
+    title: "Notifications",
+    open: "Open notifications",
+    empty: "No notifications yet.",
+    loading: "Loading notifications...",
+    loadingMore: "Loading more...",
+    loadMore: "Load more",
+    markAllRead: "Mark all as read",
+    markSeenError: "Failed to update notification",
+    markAllError: "Failed to update notifications",
+    deleteError: "Failed to delete notification",
+    loadError: "Failed to load notifications",
+    newTitle: "New notification",
+    openAction: "Open",
+    summary: (total: number, unread: number) => `${total} total, ${unread} unread`,
+  },
 }