even more getter fixes

src/App.js

@@ -1,9 +1,6 @@
 import { throttle } from 'lodash'
 import { mapState } from 'pinia'
 import { defineAsyncComponent } from 'vue'
-import { mapGetters } from 'vuex'
-import messages from 'src/i18n/messages'
-import localeService from 'src/services/locale/locale.service.js'
 
 import DesktopNav from './components/desktop_nav/desktop_nav.vue'
 import EditStatusModal from './components/edit_status_modal/edit_status_modal.vue'
@@ -24,14 +21,17 @@ import WhoToFollowPanel from './components/who_to_follow_panel/who_to_follow_pan
 import { getOrCreateServiceWorker } from './services/sw/sw'
 import { windowHeight, windowWidth } from './services/window_utils/window_utils'
 
-import { useI18nStore } from 'src/stores/i18n.js'
 import { useEmojiStore } from 'src/stores/emoji.js'
+import { useI18nStore } from 'src/stores/i18n.js'
 import { useInstanceStore } from 'src/stores/instance.js'
 import { useInstanceCapabilitiesStore } from 'src/stores/instance_capabilities.js'
 import { useInterfaceStore } from 'src/stores/interface.js'
 import { useShoutStore } from 'src/stores/shout.js'
 import { useSyncConfigStore } from 'src/stores/sync_config.js'
 
+import messages from 'src/i18n/messages'
+import localeService from 'src/services/locale/locale.service.js'
+
 export default {
   name: 'app',
   components: {
@@ -142,7 +142,9 @@ export default {
       return this.currentUser.background_image
     },
     instanceBackground() {
-      return useSyncConfigStore().mergedConfig.hideInstanceWallpaper ? null : this.instanceBackgroundUrl
+      return useSyncConfigStore().mergedConfig.hideInstanceWallpaper
+        ? null
+        : this.instanceBackgroundUrl
     },
     background() {
       return this.userBackground || this.instanceBackground
@@ -203,7 +205,7 @@ export default {
         !useSyncConfigStore().mergedConfig.hideISP
       )
     },
-    ...mapGetters(['mergedConfig']),
+    ...mapState(useSyncConfigStore, ['mergedConfig']),
     ...mapState(useInterfaceStore, [
       'themeApplied',
       'styleDataUsed',