view data fixes

apps/website/lib/view-data/ActivityItemViewData.ts

@@ -0,0 +1,14 @@
+import { ViewData } from '../contracts/view-data/ViewData';
+
+/**
+ * ActivityItemViewData
+ *
+ * ViewData for activity item rendering.
+ */
+export interface ActivityItemViewData extends ViewData {
+  id: string;
+  type: string;
+  message: string;
+  time: string;
+  impressions?: number;
+}