fix(wechat): sync MindSpace pages after MP generation and redirect on 401

WeChat page delivery now triggers syncUserGeneratedPages so write_file HTML
gets page records; public share widget redirects unauthenticated owners to
WeChat OAuth instead of only showing an error.

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

server/portal-integration-services-bootstrap.test.mjs

@@ -129,6 +129,10 @@ function createSetup(overrides = {}) {
     apiSecret: 'secret',
     mindSpacePages: { id: 'pages' },
     mindSpacePageLiveEdit: { id: 'live-edit' },
+    syncUserGeneratedPages(userId, options) {
+      calls.push(['sync-user-pages', userId, options]);
+      return Promise.resolve({ created: 1, updated: 0, skipped: 0 });
+    },
     logger: {
       log(...args) {
         calls.push(['log', ...args]);
@@ -407,6 +411,13 @@ test('preserves generated-page analytics projection', async () => {
       .length,
     1,
   );
+  const syncCall = setup.calls.find(
+    ([name]) => name === 'sync-user-pages',
+  );
+  assert.ok(syncCall);
+  assert.equal(syncCall[1], 'user-1');
+  assert.equal(syncCall[2].sessionId, 'session-1');
+  assert.deepEqual(syncCall[2].onlyRelativePaths, ['public/page.html']);
   const analyticsCall = setup.calls.find(
     ([name]) => name === 'analytics',
   );