feature: version one notification feature implemented.

frontend/messages/en.json

@@ -968,6 +968,30 @@
     "monthNovember": "November",
     "monthDecember": "December"
   },
+  "notifications": {
+    "bellAria": "Notifications",
+    "unreadCount": "{count} unread notifications",
+    "dropdownTitle": "Notifications",
+    "viewAll": "View all",
+    "pageTitle": "Notifications",
+    "pageSubtitle": "Updates from cases, tasks, organizations, and staff.",
+    "loading": "Loading notifications…",
+    "empty": "No notifications yet.",
+    "loadMore": "Load more",
+    "markAllRead": "Mark all as read",
+    "errorLoad": "Could not load notifications.",
+    "errorMarkRead": "Could not update notification.",
+    "typeCaseSent": "New lab case received",
+    "typeClinicComment": "New clinic comment on a case",
+    "typeLabComment": "New lab comment on a case",
+    "typeLabCommentClinic": "New lab comment on your case",
+    "typeCaseImportant": "Case marked as important",
+    "typeTaskCompleted": "Lab task completed",
+    "typeTaskAssigned": "A task was assigned to you",
+    "typeConnectionRequest": "New organization connection request",
+    "typeStaffInvite": "Staff invitation created",
+    "typeUnknown": "Notification"
+  },
   "errors": {
     "GENERIC": "Something went wrong. Please try again.",
     "NETWORK_ERROR": "Could not reach the server. Check your connection and try again.",