API report updates and frontend-*-api fixes

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/user-settings/alpha-api-report.md

@@ -3,19 +3,20 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
-import { AnyExternalRoutes } from '@backstage/core-plugin-api';
-import { AnyRoutes } from '@backstage/core-plugin-api';
+import { AnyExternalRoutes } from '@backstage/frontend-plugin-api';
 import { BackstagePlugin } from '@backstage/frontend-plugin-api';
-import { RouteRef } from '@backstage/core-plugin-api';
+import { RouteRef } from '@backstage/frontend-plugin-api';
 import { TranslationRef } from '@backstage/core-plugin-api/alpha';
 
 // @alpha (undocumented)
-const _default: BackstagePlugin<AnyRoutes, AnyExternalRoutes>;
+const _default: BackstagePlugin<
+  {
+    root: RouteRef<undefined>;
+  },
+  AnyExternalRoutes
+>;
 export default _default;
 
-// @alpha (undocumented)
-export const userSettingsRouteRef: RouteRef<undefined>;
-
 // @alpha (undocumented)
 export const userSettingsTranslationRef: TranslationRef<
   'user-settings',