feat: add policy pages

app/(app)/u/[handle]/collections/page.tsx

@@ -0,0 +1,27 @@
+"use client";
+
+/**
+ * /u/[handle]/collections — public collections for a profile.
+ *
+ * The list comes from the layout's profile fetch (`public_collections`),
+ * so this page only has to decide between the empty state and the grid.
+ * Layout owns the ProfileHeader + tabs + container.
+ */
+
+import { CollectionViews } from "@/components/social/collection-views";
+import { usePublicProfile } from "../profile-context";
+
+export default function PublicProfileCollectionsPage() {
+  const data = usePublicProfile();
+  const list = data.public_collections ?? [];
+
+  if (list.length === 0) {
+    return (
+      <p className="text-sm text-muted-foreground">
+        No public collections yet.
+      </p>
+    );
+  }
+
+  return <CollectionViews collections={list} hrefFor={(c) => `/c/${c.id}`} />;
+}