[Accessibility] Manage focus on navigation (#39350)

app/javascript/mastodon/components/status.jsx

@@ -33,6 +33,7 @@ import StatusContent from './status_content';
 import { StatusThreadLabel } from './status_thread_label';
 import { CollectionPreviewCard } from '../features/collections/components/collection_preview_card';
 import { compareUrls } from '../utils/compare_urls';
+import { FOCUS_TARGET } from './navigation_focus_target';
 
 const domParser = new DOMParser();
 
@@ -311,9 +312,9 @@ class Status extends ImmutablePureComponent {
       window.open(path, '_blank', 'noopener');
     } else {
       if (history.location.pathname.replace('/deck/', '/') === path) {
-        history.replace(path);
+        history.replace(path, {focusTarget: FOCUS_TARGET.POST});
       } else {
-        history.push(path);
+        history.push(path, {focusTarget: FOCUS_TARGET.POST});
       }
     }
   };