feat(beta): public spaces (#2473)

apps/client/src/features/public-space/hooks/use-docs-current-page.ts

@@ -0,0 +1,23 @@
+import { useMemo } from "react";
+import { useParams } from "react-router-dom";
+import { useDocsSurface } from "@/features/public-space/components/docs/docs-surface-context.tsx";
+import { flattenTreePreorder } from "@/features/public-space/utils/docs-tree.ts";
+import { extractPageSlugId } from "@/lib";
+import { SharedPageTreeNode } from "@/features/share/utils.ts";
+
+export function useDocsCurrentPage(): SharedPageTreeNode | null {
+  const { pageSlug } = useParams();
+  const { treeData } = useDocsSurface();
+
+  return useMemo(() => {
+    if (!treeData?.length) return null;
+    const currentSlugId = pageSlug
+      ? extractPageSlugId(pageSlug)
+      : treeData[0]?.slugId;
+    return (
+      flattenTreePreorder(treeData).find(
+        (node) => node.slugId === currentSlugId,
+      ) ?? null
+    );
+  }, [treeData, pageSlug]);
+}