feat: 完成T-205账号就绪引导保护

CollectWorker 增加采集前账号就绪预检：无账号、匹配账号 CDP 端口未响应或未登录时返回 blocked，不进入逐条采集，也不写 skipped/failed。

CollectTab 收到 blocked 后弹窗汇总原因，并跳转/引导到④账号管理配置账号、启动对应 Chrome、人工登录；MainWindow 为①传入打开④的回调。

新增 GUI 测试覆盖无账号、Chrome 未启动、未登录和弹窗引导；同步 T-205 状态、api、current-state 与 progress。

tests/test_gui.py

@@ -33,6 +33,12 @@ class GuiTests(TempDirMixin, unittest.TestCase):
     def setUpClass(cls):
         cls.app = QApplication.instance() or QApplication([])
 
+    def tearDown(self):
+        for widget in QApplication.topLevelWidgets():
+            widget.close()
+            widget.deleteLater()
+        self.app.processEvents()
+
     def make_config(self, temp_dir):
         return {
             "chrome_path": "chrome.exe",
@@ -369,7 +375,12 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
             with mock.patch("app.gui.accounts.detect_login", side_effect=fake_login), \
                     mock.patch("app.gui.editor.collect", side_effect=fake_collect) as collect:
-                summary = CollectWorker(tasks, db_path=cfg["db_path"], config=cfg).execute()
+                summary = CollectWorker(
+                    tasks,
+                    db_path=cfg["db_path"],
+                    config=cfg,
+                    preflight=False,
+                ).execute()
 
             self.assertEqual({"ok": True, "total": 3, "done": 3, "collected": 1, "skipped": 2, "failed": 0}, summary)
             collect.assert_called_once()
@@ -453,6 +464,138 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
         self.assert_removed(temp_dir)
 
+    def test_collect_worker_preflight_blocks_when_no_accounts(self):
+        with self.make_temp_dir() as temp_dir:
+            cfg = self.make_config(temp_dir)
+            db.init_db(cfg["db_path"])
+            batch_id = db.create_batch(["input.xlsx"], path=cfg["db_path"])
+            db.insert_tasks(
+                batch_id,
+                [
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 2,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639510",
+                    }
+                ],
+                path=cfg["db_path"],
+            )
+            tasks = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])
+
+            summary = CollectWorker(tasks, db_path=cfg["db_path"], config=cfg).execute()
+
+            self.assertTrue(summary["blocked"])
+            self.assertTrue(summary["no_accounts"])
+            self.assertEqual("NO_ACCOUNTS", summary["reason"])
+
+        self.assert_removed(temp_dir)
+
+    def test_collect_worker_preflight_blocks_when_chrome_not_running(self):
+        with self.make_temp_dir() as temp_dir:
+            cfg = self.make_config(temp_dir)
+            accounts.create_account("主店", "alias-a", debug_port=9222, config=cfg)
+            batch_id = db.create_batch(["input.xlsx"], path=cfg["db_path"])
+            db.insert_tasks(
+                batch_id,
+                [
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 2,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639510",
+                    }
+                ],
+                path=cfg["db_path"],
+            )
+            tasks = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])
+
+            with mock.patch("app.gui.chrome.is_running", return_value=False) as is_running, \
+                    mock.patch("app.gui.accounts.detect_login") as detect_login, \
+                    mock.patch("app.gui.editor.collect") as collect:
+                summary = CollectWorker(tasks, db_path=cfg["db_path"], config=cfg).execute()
+
+            self.assertTrue(summary["blocked"])
+            self.assertEqual("ACCOUNT_NOT_READY", summary["reason"])
+            self.assertEqual("alias-a", summary["not_running"][0]["alias"])
+            is_running.assert_called_once_with(9222)
+            detect_login.assert_not_called()
+            collect.assert_not_called()
+
+        self.assert_removed(temp_dir)
+
+    def test_collect_worker_preflight_blocks_when_account_not_logged_in(self):
+        with self.make_temp_dir() as temp_dir:
+            cfg = self.make_config(temp_dir)
+            accounts.create_account("主店", "alias-a", debug_port=9222, config=cfg)
+            batch_id = db.create_batch(["input.xlsx"], path=cfg["db_path"])
+            db.insert_tasks(
+                batch_id,
+                [
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 2,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639510",
+                    }
+                ],
+                path=cfg["db_path"],
+            )
+            tasks = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])
+
+            with mock.patch("app.gui.chrome.is_running", return_value=True), \
+                    mock.patch(
+                        "app.gui.accounts.detect_login",
+                        return_value={"logged_in": False, "reason": "LOGIN_PAGE"},
+                    ), mock.patch("app.gui.editor.collect") as collect:
+                summary = CollectWorker(tasks, db_path=cfg["db_path"], config=cfg).execute()
+
+            self.assertTrue(summary["blocked"])
+            self.assertEqual("alias-a", summary["logged_out"][0]["alias"])
+            self.assertIn("账号未登录", summary["logged_out"][0]["reason"])
+            collect.assert_not_called()
+
+        self.assert_removed(temp_dir)
+
+    def test_collect_tab_blocked_preflight_guides_to_accounts_tab(self):
+        with self.make_temp_dir() as temp_dir:
+            opened = []
+            statuses = []
+            tab = CollectTab(
+                config=self.make_config(temp_dir),
+                status_callback=statuses.append,
+                open_accounts_callback=lambda: opened.append(True),
+            )
+            self.addCleanup(tab.close)
+            payload = {
+                "blocked": True,
+                "not_running": [
+                    {
+                        "account_name": "主店",
+                        "alias": "alias-a",
+                        "reason": "CDP 端口未响应",
+                    }
+                ],
+                "logged_out": [],
+            }
+
+            with mock.patch("app.gui.QMessageBox.warning") as warning:
+                tab._on_collect_finished(payload)
+
+            message = warning.call_args[0][2]
+            self.assertIn("Chrome 未启动", message)
+            self.assertIn("④ 账号管理", message)
+            self.assertEqual([True], opened)
+            self.assertIn("④ 账号管理", statuses[-1])
+
+        self.assert_removed(temp_dir)
+
     def test_write_back_worker_calls_excel_write_back(self):
         with mock.patch(
             "app.gui.excel.write_back",