feat(subscription): add membership access preflight

tests/test_gui.py

@@ -22,6 +22,7 @@ from app import (
     image_studio,
     product_status,
     prompts,
+    subscription,
     update_check,
     update_installer,
 )
@@ -11154,6 +11155,62 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
         self.assert_removed(temp_dir)
 
+    def test_main_window_displays_active_subscription_in_header(self):
+        with self.make_temp_dir() as temp_dir:
+            window = MainWindow(config=self.make_config(temp_dir))
+            self.addCleanup(window.close)
+            status = subscription.SubscriptionStatus(
+                subscription.STATUS_ACTIVE,
+                account_name="主账号",
+                plan_name="专业版",
+                expires_at="2026-08-20T23:59:59+08:00",
+            )
+
+            window._apply_subscription_status(status, show_prompt=False)
+
+            self.assertIn("主账号 · 专业版 · 有效至2026-08-20", window._subscription_label.text())
+            self.assertTrue(
+                all(window.tabs.isTabEnabled(index) for index in range(window.tabs.count()))
+            )
+
+    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))
+            self.addCleanup(window.close)
+            status = subscription.SubscriptionStatus(subscription.STATUS_EXPIRED)
+
+            window._apply_subscription_status(status, show_prompt=False)
+
+            for index, title in enumerate(TAB_TITLES):
+                self.assertEqual(title == "设置", window.tabs.isTabEnabled(index))
+            self.assertEqual(TAB_TITLES.index("设置"), window.tabs.currentIndex())
+
+    def test_generate_and_suite_preflight_can_stop_new_submissions(self):
+        with self.make_temp_dir() as temp_dir:
+            config = self.make_config(temp_dir)
+            actions = []
+
+            def deny(action):
+                actions.append(action)
+                return False
+
+            generate_tab = GenerateTab(
+                config=config,
+                subscription_preflight_callback=deny,
+            )
+            self.addCleanup(generate_tab.close)
+            generate_tab.start_generate()
+
+            suite_tab = ProductSuiteTab(
+                config=config,
+                db_path=config["db_path"],
+                subscription_preflight_callback=deny,
+            )
+            self.addCleanup(suite_tab.close)
+            self.assertFalse(suite_tab.start_generation(None))
+
+            self.assertEqual(["开始 AI 生成", "生成商品套图"], actions)
+
     def test_accounts_tab_launch_failure_restores_controls(self):
         with self.make_temp_dir() as temp_dir:
             cfg = self.make_config(temp_dir)