修复 Step 5 导航交棒后的完成收尾

tests/background-step5-post-completion-validation.test.js

@@ -201,3 +201,59 @@ return {
     true
   );
 });
+
+test('step 5 recovers from bfcache transport close when tab already reached chatgpt', async () => {
+  const api = new Function(`
+const logs = [];
+let waitCalls = 0;
+
+async function getTabId(source) {
+  return source === 'openai-auth' ? 42 : null;
+}
+
+async function waitForTabStableComplete(tabId) {
+  waitCalls += 1;
+  if (tabId !== 42) throw new Error('unexpected tab id');
+  return { url: 'https://chatgpt.com/' };
+}
+
+async function addLog(message, level, meta) {
+  logs.push({ message, level, meta });
+}
+
+function getErrorMessage(error) {
+  return String(error?.message || error || '');
+}
+
+${extractFunction('parseUrlSafely')}
+${extractFunction('isSignupEntryHost')}
+${extractFunction('isLikelyLoggedInChatgptHomeUrl')}
+${extractFunction('isStep5CompletionChatgptUrl')}
+${extractFunction('completeStep5FromTabUrlAfterTransportError')}
+
+return {
+  async run() {
+    return completeStep5FromTabUrlAfterTransportError(new Error('The page keeping the extension port is moved into back/forward cache, so the message channel is closed.'));
+  },
+  snapshot() {
+    return { logs, waitCalls };
+  },
+};
+`)();
+
+  const result = await api.run();
+  const snapshot = api.snapshot();
+
+  assert.deepStrictEqual(result, {
+    profileSubmitted: true,
+    postSubmitChecked: true,
+    outcome: 'logged_in_home',
+    url: 'https://chatgpt.com/',
+    recoveredFromTransportError: true,
+  });
+  assert.equal(snapshot.waitCalls, 1);
+  assert.equal(
+    snapshot.logs.some(({ message }) => /通信中断，但后台确认标签页已进入 chatgpt\.com/.test(message)),
+    true
+  );
+});

tests/step5-direct-complete.test.js

@@ -1109,7 +1109,7 @@ return {
   assert.equal(api.isCompletion('https://chatgpt.com/add-phone'), false);
 });
 
-test('step 5 navigation reporter does not complete on beforeunload alone', () => {
+test('step 5 navigation reporter hands off to background on beforeunload', () => {
   const api = new Function(`
 const events = [];
 const listeners = new Map();
@@ -1147,22 +1147,31 @@ ${extractFunction('installStep5NavigationCompletionReporter')}
 
 return {
   run() {
-    let completionCount = 0;
-    const cleanup = installStep5NavigationCompletionReporter(() => {
-      completionCount += 1;
-      events.push({ type: 'complete' });
+    const cleanup = installStep5NavigationCompletionReporter((payload) => {
+      events.push({ type: 'complete', payload });
     });
     const beforeUnload = listeners.get('beforeunload');
     if (beforeUnload) {
       beforeUnload({ type: 'beforeunload' });
     }
     cleanup();
-    return { completionCount, events };
+    return { events };
   },
 };
 `)();
 
   const result = api.run();
-  assert.equal(result.completionCount, 0);
+  assert.deepStrictEqual(
+    result.events.filter((entry) => entry.type === 'complete'),
+    [
+      {
+        type: 'complete',
+        payload: {
+          navigationStarted: true,
+          navigationEventType: 'beforeunload',
+        },
+      },
+    ]
+  );
   assert.equal(result.events.some((entry) => entry.type === 'log' && /检测到页面开始导航/.test(entry.message)), true);
 });