fix(wechat): guard ambiguous memory recall and scheduled task execution

Skip memory injection for short filler messages, demote page-workflow memory
pollution, keep scheduled automation off page.generate, and fail scheduled
tasks that only return clarification instead of deliverables.

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

wechat/intent/patterns.mjs

@@ -4,6 +4,7 @@ import {
   isWechatPageEditText,
   isWechatPageRetryText,
 } from './page-continuation.mjs';
+import { shouldUseScheduledTaskAutomation } from '../../scheduled-task-intent.mjs';
 
 export const PAGE_GENERATE_PATTERN =
   /(?:生成|创建|做|写|帮我.*(?:生成|创建|做|写)).*(?:html|页面|网页|page|文件)/iu;
@@ -29,6 +30,7 @@ export const CONNECTIVITY_TEST_PATTERN = /^(测试\s*\d*|test\s*\d*)[!！。.\s]
 export function isPageGenerateText(text) {
   const normalized = String(text ?? '').trim();
   if (!normalized) return false;
+  if (shouldUseScheduledTaskAutomation(normalized)) return false;
   if (PAGE_GENERATE_NEGATION_PATTERN.test(normalized)) return false;
   return (
     PAGE_GENERATE_PATTERN.test(normalized)