Merge remote-tracking branch 'origin/develop' into optimize

src/App.js

@@ -158,13 +158,23 @@ export default {
     userBackground() {
       return this.currentUser.background_image
     },
+    foreignProfileBackground() {
+      return (
+        useMergedConfigStore().mergedConfig.allowForeignUserBackground &&
+        useInterfaceStore().foreignProfileBackground
+      )
+    },
     instanceBackground() {
       return useMergedConfigStore().mergedConfig.hideInstanceWallpaper
         ? null
         : this.instanceBackgroundUrl
     },
     background() {
-      return this.userBackground || this.instanceBackground
+      return (
+        this.foreignProfileBackground ||
+        this.userBackground ||
+        this.instanceBackground
+      )
     },
     bgStyle() {
       if (this.background) {