feat: 完成T-401更新确认页

- 新增 ApplyTab 和 ApplyTaskTableModel，③ Tab 展示已生成更新候选任务

- 支持按批次、店铺、状态筛选，默认列出待更新任务并展示失败/已更新状态

- 开始更新弹窗确认当前筛选条件、任务数和线上提交风险，取消不执行不改库

- 补充 GUI 测试覆盖筛选、确认弹窗和不调用 apply_task 的 T-401 边界

- 同步任务看板、API、路由、当前状态与 progress 文档

tests/test_gui.py

@@ -20,6 +20,7 @@ from PySide6.QtWidgets import QApplication, QLineEdit, QPlainTextEdit, QTableVie
 from app.gui import (
     AccountDialog,
     AccountsTab,
+    ApplyTab,
     CollectWorker,
     CollectTab,
     GenerateWorker,
@@ -68,6 +69,7 @@ class GuiTests(TempDirMixin, unittest.TestCase):
             self.assertIn("margin-right: 8px", window.tabs.styleSheet())
             self.assertIsInstance(window.tabs.widget(0), CollectTab)
             self.assertIsInstance(window.tabs.widget(1), GenerateTab)
+            self.assertIsInstance(window.tabs.widget(2), ApplyTab)
             self.assertEqual(
                 "回写旧数据到 Excel",
                 window.tabs.widget(0).write_back_button.text(),
@@ -233,6 +235,170 @@ class GuiTests(TempDirMixin, unittest.TestCase):
 
         self.assert_removed(temp_dir)
 
+    def test_apply_tab_lists_generated_tasks_and_filters_by_batch_shop_status(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)
+            accounts.create_account("副店", "alias-b", debug_port=9223, config=cfg)
+            batch_a = db.create_batch(["input-a.xlsx"], path=cfg["db_path"])
+            batch_b = db.create_batch(["input-b.xlsx"], path=cfg["db_path"])
+            db.insert_tasks(
+                batch_a,
+                [
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input-a.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 2,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639510",
+                    },
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input-a.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 3,
+                        "account_name": "Excel副店",
+                        "alias": "alias-b",
+                        "item_id": "51100639511",
+                    },
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input-a.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 4,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639512",
+                    },
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input-a.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 5,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639513",
+                    },
+                ],
+                path=cfg["db_path"],
+            )
+            db.insert_tasks(
+                batch_b,
+                [
+                    {
+                        "source_file_abs": os.path.join(temp_dir, "input-b.xlsx"),
+                        "source_sheet": "商品",
+                        "source_row": 2,
+                        "account_name": "Excel主店",
+                        "alias": "alias-a",
+                        "item_id": "51100639514",
+                    }
+                ],
+                path=cfg["db_path"],
+            )
+            tasks_a = db.list_tasks(batch_id=batch_a, path=cfg["db_path"])
+            tasks_b = db.list_tasks(batch_id=batch_b, path=cfg["db_path"])
+            for task in tasks_a[:3] + tasks_b:
+                db.set_collected(task.id, "旧标题" + task.item_id[-2:], "old.jpg", path=cfg["db_path"])
+                db.set_generated(
+                    task.id,
+                    "新标题" + task.item_id[-2:],
+                    os.path.join(temp_dir, task.item_id + "_new.jpg"),
+                    path=cfg["db_path"],
+                )
+            db.mark_failed(tasks_a[2].id, "apply", "更新失败", path=cfg["db_path"])
+            db.set_applied(tasks_b[0].id, True, path=cfg["db_path"])
+
+            tab = ApplyTab(config=cfg)
+            self.addCleanup(tab.close)
+
+            self.assertIsInstance(tab.task_table, QTableView)
+            self.assertEqual(["店铺", "商品ID", "新标题", "新封面", "阶段", "结果"], tab.model.HEADERS)
+            self.assertEqual("开始更新", tab.start_update_button.text())
+            self.assertEqual("停止", tab.stop_update_button.text())
+            self.assertFalse(tab.stop_update_button.isEnabled())
+            self.assertEqual(2, tab.model.rowCount())
+            self.assertEqual("主店", tab.model.index(0, 0).data())
+            self.assertEqual("51100639510", tab.model.index(0, 1).data())
+            self.assertEqual("新标题10", tab.model.index(0, 2).data())
+            self.assertEqual("51100639510_new.jpg", tab.model.index(0, 3).data())
+            self.assertEqual("待更新", tab.model.index(0, 4).data())
+            self.assertEqual("待更新", tab.model.index(0, 5).data())
+            self.assertEqual("任务 2/4 条", tab.summary_label.text())
+
+            tab.status_filter.setCurrentIndex(tab.status_filter.findData("failed"))
+            self.assertEqual(1, tab.model.rowCount())
+            self.assertEqual("失败", tab.model.index(0, 5).data())
+            self.assertEqual(
+                "更新失败",
+                tab.model.data(tab.model.index(0, 0), gui.Qt.ToolTipRole),
+            )
+
+            tab.status_filter.setCurrentIndex(tab.status_filter.findData("generated"))
+            tab.shop_filter.setCurrentIndex(tab.shop_filter.findData("alias-b"))
+            self.assertEqual(1, tab.model.rowCount())
+            self.assertEqual("副店", tab.model.index(0, 0).data())
+
+            tab.shop_filter.setCurrentIndex(tab.shop_filter.findData(None))
+            tab.batch_filter.setCurrentIndex(tab.batch_filter.findData(batch_b))
+            tab.status_filter.setCurrentIndex(tab.status_filter.findData("applied"))
+            self.assertEqual(1, tab.model.rowCount())
+            self.assertEqual("已更新", tab.model.index(0, 4).data())
+            self.assertEqual("成功", tab.model.index(0, 5).data())
+
+        self.assert_removed(temp_dir)
+
+    def test_apply_tab_start_update_requires_confirmation_without_running_apply(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"],
+            )
+            task = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])[0]
+            db.set_collected(task.id, "旧标题", "old.jpg", path=cfg["db_path"])
+            db.set_generated(task.id, "新标题", "new.jpg", path=cfg["db_path"])
+            statuses = []
+            tab = ApplyTab(config=cfg, status_callback=statuses.append)
+            self.addCleanup(tab.close)
+
+            with mock.patch(
+                "app.gui.QMessageBox.question",
+                return_value=gui.QMessageBox.No,
+            ) as question, mock.patch("app.gui.editor.apply_task") as apply_task:
+                tab.start_update()
+
+            message = question.call_args[0][2]
+            self.assertIn("任务数：1", message)
+            self.assertIn("提交线上", message)
+            self.assertIn("状态：已生成", message)
+            self.assertEqual("已取消开始更新", statuses[-1])
+            apply_task.assert_not_called()
+
+            with mock.patch(
+                "app.gui.QMessageBox.question",
+                return_value=gui.QMessageBox.Yes,
+            ), mock.patch("app.gui.editor.apply_task") as apply_task:
+                tab.start_update()
+
+            self.assertIn("已确认更新范围：1 条", statuses[-1])
+            apply_task.assert_not_called()
+            unchanged = db.list_tasks(batch_id=batch_id, path=cfg["db_path"])[0]
+            self.assertEqual("generated", unchanged.stage)
+            self.assertEqual("success", unchanged.status)
+
+        self.assert_removed(temp_dir)
+
     def test_generate_tab_lists_tasks_and_filters_by_shop_status_and_batch(self):
         with self.make_temp_dir() as temp_dir:
             cfg = self.make_config(temp_dir)