Decrease count of filtered notifications when notification requests are accepted or dismissed (#31149)

app/javascript/mastodon/reducers/notification_policy.ts

@@ -2,17 +2,25 @@ import { createReducer, isAnyOf } from '@reduxjs/toolkit';
 
 import {
   fetchNotificationPolicy,
+  decreasePendingNotificationsCount,
   updateNotificationsPolicy,
 } from 'mastodon/actions/notification_policies';
 import type { NotificationPolicy } from 'mastodon/models/notification_policy';
 
 export const notificationPolicyReducer =
   createReducer<NotificationPolicy | null>(null, (builder) => {
-    builder.addMatcher(
-      isAnyOf(
-        fetchNotificationPolicy.fulfilled,
-        updateNotificationsPolicy.fulfilled,
-      ),
-      (_state, action) => action.payload,
-    );
+    builder
+      .addCase(decreasePendingNotificationsCount, (state, action) => {
+        if (state) {
+          state.summary.pending_notifications_count -= action.payload;
+          state.summary.pending_requests_count -= 1;
+        }
+      })
+      .addMatcher(
+        isAnyOf(
+          fetchNotificationPolicy.fulfilled,
+          updateNotificationsPolicy.fulfilled,
+        ),
+        (_state, action) => action.payload,
+      );
   });