fix(page-data): harden structural delivery and Portal base URL

Reject /api/page-data/ legacy passthrough, verify live API before send,
and resolve delivery links to Portal (8081) instead of Vite (5173).
Add local repair/verify scripts for daily-register Page Data flow.

Co-authored-by: Cursor <cursoragent@cursor.com>

page-data-workspace-bind.mjs

@@ -8,7 +8,7 @@ import { normalizePageAccessPolicy } from './page-access-policy.mjs';
 import { upsertPageDataPolicyIndex } from './page-data-policy-index.mjs';
 import { syncPageDataPolicyAccessMode } from './page-data-publish-sync.mjs';
 import { createMindSpacePublicUrl } from './mindspace-canonical-url.mjs';
-import { resolvePublicBaseUrl } from './user-publish.mjs';
+import { resolvePageDataDeliveryBaseUrl } from './user-publish.mjs';
 import { createUserDataSpaceService } from './user-data-space-service.mjs';
 import {
   assertPolicyMatchesHtmlDatasets,
@@ -127,7 +127,7 @@ async function ensureWorkspaceHtmlPublished({
 }
 
 function buildWorkspacePublicUrl(userId, relativePath) {
-  const publicBaseUrl = resolvePublicBaseUrl();
+  const publicBaseUrl = resolvePageDataDeliveryBaseUrl();
   return createMindSpacePublicUrl({
     publicBaseUrl,
     ownerKey: userId,