Merge commit '89269e4b713e3291a5c8c29b8d2e7b950b60eb35' into glitch-soc/merge-upstream

Conflicts:
- `tsconfig.json`:
  Upstream changed the config to properly process imports.
  Glitch-soc had previously already done so.
  Changed the config to better match upstream.

app/javascript/mastodon/actions/app.ts

@@ -1,10 +1,11 @@
 import { createAction } from '@reduxjs/toolkit';
+import type { LayoutType } from '../is_mobile';
 
 export const focusApp = createAction('APP_FOCUS');
 export const unfocusApp = createAction('APP_UNFOCUS');
 
 type ChangeLayoutPayload = {
-  layout: 'mobile' | 'single-column' | 'multi-column';
+  layout: LayoutType;
 };
 export const changeLayout =
   createAction<ChangeLayoutPayload>('APP_LAYOUT_CHANGE');