Add Twitter compatibility redirects

src/boot/routes.js

@@ -39,6 +39,12 @@ export default (store) => {
           : store.state.instance.redirectRootNoLogin) || '/main/all'
       }
     },
+
+    // Redirects from Mastodon, Soapbox FE, etc. to fix old bookmarks
+    { path: '/@:username/posts/:statusId', redirect: '/notice/:statusId' },
+    { path: '/@:username/:statusId', redirect: '/notice/:statusId' },
+    { path: '/:username/status/:statusId', redirect: '/notice/:statusId' },
+
     { name: 'public-external-timeline', path: '/main/all', component: PublicAndExternalTimeline },
     { name: 'public-timeline', path: '/main/public', component: PublicTimeline },
     { name: 'friends', path: '/main/friends', component: FriendsTimeline, beforeEnter: validateAuthenticatedRoute },