merge: honor explicit WeChat page generation negation

Merge real-WeChat acceptance fix after successful CI.

wechat/image-generation-policy.test.mjs

@@ -6,6 +6,7 @@ import {
   resolveWechatImageGenerationPolicy,
   WECHAT_PAGE_THUMBNAIL_MODE,
 } from './image-generation-policy.mjs';
+import { classifyWechatIntent } from './intent/classifier.mjs';
 
 test('service-account page always requires a fresh thumbnail without forcing body images', () => {
   const policy = resolveWechatImageGenerationPolicy({
@@ -47,3 +48,17 @@ test('standalone image intent gets an inline_image tool contract', () => {
   assert.match(instruction, /purpose=`inline_image`/);
   assert.match(instruction, /idempotency_key=wechat-msg-1-image/);
 });
+
+test('explicitly declining a page keeps standalone image generation out of page flow', () => {
+  const text = '请生成一张雨夜橘猫插画，只生成图片，不要生成页面';
+  const intent = classifyWechatIntent({ msgType: 'text', agentText: text });
+  assert.equal(intent.kind, 'chat.general');
+
+  const policy = resolveWechatImageGenerationPolicy({
+    text,
+    isPageGenerate: intent.kind === 'page.generate',
+    requireFreshPageThumbnail: true,
+  });
+  assert.equal(policy.pageThumbnailMode, 'auto');
+  assert.equal(policy.standaloneImageMode, 'required');
+});

wechat/intent/patterns.mjs

@@ -3,6 +3,9 @@
 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;
 
+export const PAGE_GENERATE_NEGATION_PATTERN =
+  /(?:不要|无需|不用|别|不需要)\s*(?:再\s*)?(?:生成|创建|制作|做|写)\s*(?:任何|一个|新的)?\s*(?:html|页面|网页|page|文件)/iu;
+
 export const DOCX_DOWNLOAD_PATTERN =
   /(?:(?:word|docx|\.docx|\.doc|文档).*(?:下载|链接|导出|给我)|(?:下载|导出|提供|给我).*(?:word|docx|\.docx|\.doc|文档))/iu;
 
@@ -21,6 +24,7 @@ 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 (PAGE_GENERATE_NEGATION_PATTERN.test(normalized)) return false;
   return PAGE_GENERATE_PATTERN.test(normalized);
 }