fix: undefined functions/properties across frontend (#4210)

* fix: notification mark as read

* revert: composition API change

* fix: categories

* feat: enable vue/no-undef-properties in 'warn' mode.

* fix: app undefined properties

* revert: ss block

* fix: eslint-disable for [version].vue

apps/frontend/src/pages/settings/index.vue

@@ -210,6 +210,7 @@ import { formatProjectType } from '@modrinth/utils'
 import { defineMessages, useVIntl } from '@vintl/vintl'
 import { IntlFormatted } from '@vintl/vintl/components'
 
+import { normalizeChildren } from '@/utils/vue-children.ts'
 import MessageBanner from '~/components/ui/MessageBanner.vue'
 import type { DisplayLocation } from '~/plugins/cosmetics'
 import { isDarkTheme, type Theme } from '~/plugins/theme/index.ts'