Add page data delivery and publication guards

mindspace-workspace-path.mjs

@@ -1,7 +1,21 @@
+import fs from 'node:fs';
+import path from 'node:path';
 import { normalizeWorkspaceRelativePath } from './mindspace-pages.mjs';
+import { resolvePublishDir } from './user-publish.mjs';
 
 export { normalizeWorkspaceRelativePath };
 
+export async function readWorkspacePublishHtml(h5Root, userId, relativePath) {
+  const normalized = normalizeWorkspaceRelativePath(relativePath);
+  if (!h5Root || !userId || !normalized) return null;
+  const filePath = path.join(resolvePublishDir(h5Root, { id: userId }), ...normalized.split('/'));
+  try {
+    return await fs.promises.readFile(filePath, 'utf8');
+  } catch {
+    return null;
+  }
+}
+
 export function resolvePageWorkspaceRelativePath(snapshot) {
   if (!snapshot || typeof snapshot !== 'object') return null;
   return normalizeWorkspaceRelativePath(snapshot.relative_path) || null;