fix(wechat): isolate stale images and page links

wechat/intent/patterns.mjs

@@ -10,7 +10,7 @@ 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;
 
 export const TOPIC_RESET_PATTERN =
-  /^(换(个)?话题|新问题|忽略之前|不管之前|重新开始|reset)$/iu;
+  /^(换(个)?话题|换新会话|新会话|开新会话|另开会话|清空上下文|新问题|忽略之前|不管之前|重新开始|reset)$/iu;
 
 export const TOPIC_RESET_LOOSE_PATTERN = /忽略.*之前|不要管.*之前|别管.*之前/u;
 

wechat/wechat-channel.test.mjs

@@ -34,6 +34,7 @@ test('classifyWechatIntent detects page.generate', () => {
 
 test('classifyWechatIntent detects session.reset', () => {
   assert.equal(classifyWechatIntent({ msgType: 'text', agentText: '换话题' }).kind, 'session.reset');
+  assert.equal(classifyWechatIntent({ msgType: 'text', agentText: '换新会话' }).kind, 'session.reset');
 });
 
 test('selectSendableHtmlArtifacts never returns stub html', () => {