Fix lint errors (except @typescript-eslint/prefer-nullish-coalescing) (#9311)

* `yarn workspace client run lint --fix`

* `eslint-disable-next-line no-var` for service worker self

* A few more manual sw fixes

* word change

packages/sw/src/scripts/notification-read.ts

@@ -1,5 +1,3 @@
-declare var self: ServiceWorkerGlobalScope;
-
 import { get } from 'idb-keyval';
 import { pushNotificationDataMap } from '@/types';
 import { api } from '@/scripts/operations';