fix(scheduled-task): deliver verified WeChat links only after page is ready

Wait for HTML materialization before releasing delivery contracts, pass
verified MindSpace URLs through proactive WeChat sends, resend on reconcile
when pages land late, and report deferred customer-service delivery as unsent.

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

wechat-mp.mjs

@@ -2017,14 +2017,25 @@ export function createWechatMpService({
     });
   };
 
-  const sendTextToUser = async (userId, content) => {
+  const sendTextToUser = async (userId, content, { verifiedHtmlUrls = [] } = {}) => {
     const openid = await userAuth.getWechatOpenidForUser(userId, config.appId);
     if (!openid) {
       throw new Error('用户尚未绑定服务号，无法推送提醒');
     }
-    return sendCustomerServiceText(openid, content, null, {
+    const normalizedVerified = verifiedHtmlUrls
+      .map((url) => String(url ?? '').trim())
+      .filter(Boolean);
+    const sendOptions = {
       deliveryPriority: 'formal_reply',
-    });
+      verifiedHtmlUrls: normalizedVerified,
+    };
+    if (normalizedVerified.length > 0) {
+      sendOptions.linkExistsForRequest = createPreparedPublicHtmlLinkExists({
+        userId,
+        prepared: { validReplyUrls: normalizedVerified },
+      });
+    }
+    return sendCustomerServiceText(openid, content, null, sendOptions);
   };
 
   const enforceFreshPageThumbnailDelivery = async ({