refactor(gui): move membership summary to window title

tests/test_gui.py

@@ -635,21 +635,9 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
             self.assertEqual(gui.display_name(), window.windowTitle())
             self.assertIsNone(window.findChild(QLabel, "appHeaderTitle"))
-            subscription_label = window.findChild(QLabel, "subscriptionStatusLabel")
-            self.assertIsNotNone(subscription_label)
-            header = window.centralWidget().layout().itemAt(0).widget()
-            self.assertEqual("appHeader", header.objectName())
-            self.assertEqual("会员状态栏", header.accessibleName())
-            margins = header.layout().contentsMargins()
-            self.assertEqual(
-                (18, 4, 18, 2),
-                (
-                    margins.left(),
-                    margins.top(),
-                    margins.right(),
-                    margins.bottom(),
-                ),
-            )
+            self.assertIsNone(window.findChild(QLabel, "subscriptionStatusLabel"))
+            self.assertEqual(1, window.centralWidget().layout().count())
+            self.assertIs(window.tabs, window.centralWidget().layout().itemAt(0).widget())
             self.assertEqual(6, window.tabs.count())
             self.assertEqual(
                 [
@@ -11185,11 +11173,44 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
             window._apply_subscription_status(status)
 
-            self.assertIn("主账号 · 专业版 · 有效至2026-08-20", window._subscription_label.text())
+            self.assertEqual(
+                "%s | 主账号 · 专业版 · 有效至2026-08-20" % gui.display_name(),
+                window.windowTitle(),
+            )
             self.assertTrue(
                 all(window.tabs.isTabEnabled(index) for index in range(window.tabs.count()))
             )
 
+    def test_main_window_membership_title_uses_grace_and_resets_for_invalid_status(self):
+        with self.make_temp_dir() as temp_dir:
+            window = MainWindow(config=self.make_config(temp_dir))
+            self.addCleanup(window.close)
+            grace = subscription.SubscriptionStatus(
+                subscription.STATUS_GRACE,
+                account_name="主账号",
+                plan_name="测试",
+                expires_at="2026-08-21T23:59:59+08:00",
+                grace_expires_at="2026-08-23T23:59:59+08:00",
+                manage_url="https://cm.example.com/subscription",
+                notice_id="private-notice",
+            )
+
+            window._apply_subscription_status(grace)
+
+            self.assertEqual(
+                "%s | 主账号 · 测试 · 宽限至2026-08-23" % gui.display_name(),
+                window.windowTitle(),
+            )
+            self.assertNotIn("cm.example.com", window.windowTitle())
+            self.assertNotIn("private-notice", window.windowTitle())
+
+            window._apply_subscription_status(
+                subscription.SubscriptionStatus(subscription.STATUS_UNAVAILABLE)
+            )
+
+            self.assertEqual(gui.display_name(), window.windowTitle())
+            self.assertIn("当前不影响使用", window.statusBar().currentMessage())
+
     def test_main_window_restricts_tabs_when_subscription_is_invalid(self):
         with self.make_temp_dir() as temp_dir:
             window = MainWindow(config=self.make_config(temp_dir))
@@ -11252,7 +11273,8 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
             worker_factory.assert_called_once()
             self.assertTrue(thread.started)
-            self.assertEqual("会员：正在验证", window._subscription_label.text())
+            self.assertEqual(gui.display_name(), window.windowTitle())
+            self.assertEqual("正在验证会员状态", window.statusBar().currentMessage())
             self.assertTrue(
                 all(window.tabs.isTabEnabled(index) for index in range(window.tabs.count()))
             )
@@ -11262,7 +11284,7 @@ class GuiTests(TempDirMixin, unittest.TestCase):
                 window._apply_subscription_status(expired)
 
             notice.assert_not_called()
-            self.assertIn("当前不影响使用", window._subscription_label.text())
+            self.assertEqual(gui.display_name(), window.windowTitle())
             self.assertIn("当前不影响使用", window.statusBar().currentMessage())
             self.assertTrue(
                 all(window.tabs.isTabEnabled(index) for index in range(window.tabs.count()))
@@ -11285,7 +11307,10 @@ class GuiTests(TempDirMixin, unittest.TestCase):
                 window._apply_subscription_status(status)
 
             notice.assert_not_called()
-            self.assertIn("主账号 · 测试 · 有效至2026-08-21", window._subscription_label.text())
+            self.assertEqual(
+                "%s | 主账号 · 测试 · 有效至2026-08-21" % gui.display_name(),
+                window.windowTitle(),
+            )
             self.assertIn("观察模式", window.statusBar().currentMessage())
 
             with mock.patch.object(window, "begin_subscription_check") as check: