fix: fail closed when WeChat page.generate has no HTML artifact

Prevent text-only planning replies from marking WeChat delivery done when
static-page-publish never confirmed a public HTML file.

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

wechat/wechat-channel.test.mjs

@@ -218,3 +218,29 @@ test('resolvePageGenerateOutcome sends when share preview meta is present', () =
   assert.equal(outcome.action, 'send');
   assert.equal(outcome.artifacts.length, 1);
 });
+
+test('resolvePageGenerateOutcome fails closed on planning text without html artifact', () => {
+  const outcome = resolvePageGenerateOutcome({
+    reply: {
+      text: '找到了之前的新闻页面。让我先读取最新的页面格式作为参考，同时并行搜索今日新闻和天气。',
+    },
+    confirmedArtifacts: [],
+    verifiedArtifacts: [],
+  });
+  assert.equal(outcome.action, 'fail');
+  assert.equal(outcome.reason, 'missing_page_artifact');
+  assert.match(outcome.failureText, /没有按服务号页面技能真正生成成功|static-page-publish/);
+});
+
+test('resolvePageGenerateOutcome fails closed when reply links an old page but no artifact confirmed', () => {
+  const outcome = resolvePageGenerateOutcome({
+    reply: {
+      text: '[每日新闻](https://m.tkmind.cn/MindSpace/u/public/daily-news-0728.html)',
+    },
+    confirmedArtifacts: [],
+    verifiedArtifacts: [],
+    replyHasPublicLinks: true,
+  });
+  assert.equal(outcome.action, 'fail');
+  assert.equal(outcome.reason, 'missing_page_artifact');
+});