Add timeline of public posts about a trending link in web UI (#30840)

app/javascript/mastodon/models/status.ts

@@ -1,4 +1,12 @@
+import type { RecordOf } from 'immutable';
+
+import type { ApiPreviewCardJSON } from 'mastodon/api_types/statuses';
+
 export type { StatusVisibility } from 'mastodon/api_types/statuses';
 
 // Temporary until we type it correctly
 export type Status = Immutable.Map<string, unknown>;
+
+type CardShape = Required<ApiPreviewCardJSON>;
+
+export type Card = RecordOf<CardShape>;