[Glitch] Add ability to group follow notifications in WebUI

Port 6c87c76e18 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/reducers/notification_groups.ts

@@ -21,7 +21,6 @@ import {
   unmountNotifications,
   refreshStaleNotificationGroups,
   pollRecentNotifications,
-  shouldGroupNotificationType,
 } from 'flavours/glitch/actions/notification_groups';
 import {
   disconnectTimeline,
@@ -30,6 +29,7 @@ import {
 import type {
   ApiNotificationJSON,
   ApiNotificationGroupJSON,
+  NotificationType,
 } from 'flavours/glitch/api_types/notifications';
 import { compareId } from 'flavours/glitch/compare_id';
 import { usePendingItems } from 'flavours/glitch/initial_state';
@@ -205,8 +205,9 @@ function mergeGapsAround(
 function processNewNotification(
   groups: NotificationGroupsState['groups'],
   notification: ApiNotificationJSON,
+  groupedTypes: NotificationType[],
 ) {
-  if (!shouldGroupNotificationType(notification.type)) {
+  if (!groupedTypes.includes(notification.type)) {
     notification = {
       ...notification,
       group_key: `ungrouped-${notification.id}`,
@@ -476,11 +477,13 @@ export const notificationGroupsReducer = createReducer<NotificationGroupsState>(
         trimNotifications(state);
       })
       .addCase(processNewNotificationForGroups.fulfilled, (state, action) => {
-        const notification = action.payload;
-        if (notification) {
+        if (action.payload) {
+          const { notification, groupedTypes } = action.payload;
+
           processNewNotification(
             usePendingItems ? state.pendingGroups : state.groups,
             notification,
+            groupedTypes,
           );
           updateLastReadId(state);
           trimNotifications(state);