cmshoppe/app/gui.py

"""PySide6 GUI entry point."""

from __future__ import annotations

import os
import sys

try:
    from PySide6.QtCore import QAbstractTableModel, QModelIndex, Qt
    from PySide6.QtGui import QPixmap
    from PySide6.QtWidgets import (
        QAbstractItemView,
        QApplication,
        QComboBox,
        QDialog,
        QDialogButtonBox,
        QFileDialog,
        QFormLayout,
        QHBoxLayout,
        QHeaderView,
        QInputDialog,
        QLabel,
        QLineEdit,
        QMainWindow,
        QMessageBox,
        QPlainTextEdit,
        QPushButton,
        QSplitter,
        QTableView,
        QSpinBox,
        QTableWidget,
        QTableWidgetItem,
        QTabWidget,
        QVBoxLayout,
        QWidget,
    )
    QT_IMPORT_ERROR = None
except ModuleNotFoundError as exc:
    QApplication = None
    QMainWindow = object
    QTabWidget = None
    QVBoxLayout = None
    QWidget = object
    QT_IMPORT_ERROR = exc


TAB_TITLES = [
    "① 导入采集",
    "② AI生成",
    "③ 更新shopee",
    "④ 账号管理",
    "⑤ 设置",
]

TAB_STYLE = """
QTabWidget::pane {
    border-top: 1px solid #c9d1d9;
}
QTabBar::tab {
    min-width: 128px;
    min-height: 34px;
    padding: 8px 18px;
    margin-right: 8px;
    border: 1px solid #c9d1d9;
    border-bottom-color: #b8c0ca;
    background: #f4f6f8;
    color: #24292f;
}
QTabBar::tab:selected {
    background: #ffffff;
    border-color: #687785;
    border-bottom-color: #ffffff;
    font-weight: 600;
}
QTabBar::tab:hover:!selected {
    background: #eaf2ff;
}
"""


if QT_IMPORT_ERROR is None:
    from . import accounts, ai, appconfig, chrome, db, editor, excel, prompts
    from . import config as account_config


    def _database_path(db_path=None, config=None) -> str:
        return db_path or appconfig.db_path(config)


    class TaskTableModel(QAbstractTableModel):
        """Table model for task rows shared by workflow tabs."""

        HEADERS = ["账号", "别名", "商品ID", "阶段"]

        STAGE_TEXT = {
            "imported": "待采集",
            "collected": "已采集",
            "generated": "已生成",
            "applied": "已更新",
        }

        STATUS_TEXT = {
            "running": "处理中",
            "failed": "失败",
            "skipped": "略过",
            "cancelled": "已取消",
        }

        def __init__(self, parent=None):
            super().__init__(parent)
            self.tasks = []
            self.all_tasks = []
            self.account_by_alias = {}
            self.filter_mode = "all"

        def set_tasks(self, tasks, accounts):
            self.beginResetModel()
            self.all_tasks = list(tasks)
            self.account_by_alias = {
                str(account.alias).strip(): account
                for account in accounts
                if str(account.alias).strip()
            }
            self.tasks = self._filtered_tasks()
            self.endResetModel()

        def set_filter_mode(self, mode):
            self.beginResetModel()
            self.filter_mode = mode if mode in {"all", "unmatched"} else "all"
            self.tasks = self._filtered_tasks()
            self.endResetModel()

        def _filtered_tasks(self):
            if self.filter_mode == "unmatched":
                return [task for task in self.all_tasks if self.is_unmatched(task)]
            return list(self.all_tasks)

        def rowCount(self, parent=QModelIndex()):
            return 0 if parent.isValid() else len(self.tasks)

        def columnCount(self, parent=QModelIndex()):
            return 0 if parent.isValid() else len(self.HEADERS)

        def headerData(self, section, orientation, role=Qt.DisplayRole):
            if role != Qt.DisplayRole:
                return None
            if orientation == Qt.Horizontal and 0 <= section < len(self.HEADERS):
                return self.HEADERS[section]
            return section + 1 if orientation == Qt.Vertical else None

        def data(self, index, role=Qt.DisplayRole):
            if not index.isValid():
                return None
            task = self.tasks[index.row()]
            if role == Qt.DisplayRole:
                return self._display_value(task, index.column())
            if role == Qt.ToolTipRole and self.is_unmatched(task):
                return "别名未匹配账号，采集时将略过"
            return None

        def flags(self, index):
            if not index.isValid():
                return Qt.NoItemFlags
            return Qt.ItemIsEnabled | Qt.ItemIsSelectable

        def task_at(self, row):
            if row < 0 or row >= len(self.tasks):
                return None
            return self.tasks[row]

        def is_unmatched(self, task) -> bool:
            return str(task.alias).strip() not in self.account_by_alias

        def unmatched_count(self) -> int:
            return sum(1 for task in self.all_tasks if self.is_unmatched(task))

        def _account_name(self, task) -> str:
            account = self.account_by_alias.get(str(task.alias).strip())
            if account is not None:
                return account.account_name
            return task.account_name or ""

        def _stage_text(self, task) -> str:
            if self.is_unmatched(task):
                return "略过"
            if task.status in self.STATUS_TEXT and task.status != "pending":
                return self.STATUS_TEXT[task.status]
            return self.STAGE_TEXT.get(task.stage, task.stage)

        def _display_value(self, task, column):
            values = [
                self._account_name(task),
                task.alias,
                task.item_id,
                self._stage_text(task),
            ]
            return values[column] if 0 <= column < len(values) else None


    class GenerateTaskTableModel(QAbstractTableModel):
        """Table model for Tab 2 generation candidates."""

        HEADERS = ["店铺", "商品ID", "旧标题", "新标题", "状态"]

        STATUS_TEXT = {
            "running": "处理中",
            "failed": "失败",
            "skipped": "略过",
            "cancelled": "已取消",
        }

        STAGE_TEXT = {
            "imported": "未采集",
            "collected": "待生成",
            "generated": "已生成",
            "applied": "已更新",
        }

        def __init__(self, parent=None):
            super().__init__(parent)
            self.tasks = []
            self.account_by_alias = {}

        def set_tasks(self, tasks, accounts):
            self.beginResetModel()
            self.tasks = list(tasks)
            self.account_by_alias = {
                str(account.alias).strip(): account
                for account in accounts
                if str(account.alias).strip()
            }
            self.endResetModel()

        def rowCount(self, parent=QModelIndex()):
            return 0 if parent.isValid() else len(self.tasks)

        def columnCount(self, parent=QModelIndex()):
            return 0 if parent.isValid() else len(self.HEADERS)

        def headerData(self, section, orientation, role=Qt.DisplayRole):
            if role != Qt.DisplayRole:
                return None
            if orientation == Qt.Horizontal and 0 <= section < len(self.HEADERS):
                return self.HEADERS[section]
            return section + 1 if orientation == Qt.Vertical else None

        def data(self, index, role=Qt.DisplayRole):
            if not index.isValid():
                return None
            task = self.tasks[index.row()]
            if role == Qt.DisplayRole:
                return self._display_value(task, index.column())
            if role == Qt.ToolTipRole and task.last_error:
                return task.last_error
            return None

        def flags(self, index):
            if not index.isValid():
                return Qt.NoItemFlags
            return Qt.ItemIsEnabled | Qt.ItemIsSelectable

        def task_at(self, row):
            if row < 0 or row >= len(self.tasks):
                return None
            return self.tasks[row]

        def account_name_for(self, task):
            return self._account_name(task)

        def _account_name(self, task):
            account = self.account_by_alias.get(str(task.alias).strip())
            if account is not None:
                return account.account_name
            return task.account_name or task.alias or ""

        def _status_text(self, task):
            if task.status in self.STATUS_TEXT and task.status != "pending":
                return self.STATUS_TEXT[task.status]
            return self.STAGE_TEXT.get(task.stage, task.stage)

        def _display_value(self, task, column):
            values = [
                self._account_name(task),
                task.item_id,
                task.old_title or "",
                task.new_title or "",
                self._status_text(task),
            ]
            return values[column] if 0 <= column < len(values) else None


    class ApplyTaskTableModel(QAbstractTableModel):
        """Table model for Tab 3 update candidates."""

        HEADERS = ["店铺", "商品ID", "新标题", "新封面", "阶段", "结果"]

        STATUS_TEXT = {
            "running": "处理中",
            "failed": "失败",
            "skipped": "略过",
            "cancelled": "已取消",
            "pending": "待更新",
            "success": "成功",
        }

        def __init__(self, parent=None):
            super().__init__(parent)
            self.tasks = []
            self.account_by_alias = {}

        def set_tasks(self, tasks, accounts):
            self.beginResetModel()
            self.tasks = list(tasks)
            self.account_by_alias = {
                str(account.alias).strip(): account
                for account in accounts
                if str(account.alias).strip()
            }
            self.endResetModel()

        def rowCount(self, parent=QModelIndex()):
            return 0 if parent.isValid() else len(self.tasks)

        def columnCount(self, parent=QModelIndex()):
            return 0 if parent.isValid() else len(self.HEADERS)

        def headerData(self, section, orientation, role=Qt.DisplayRole):
            if role != Qt.DisplayRole:
                return None
            if orientation == Qt.Horizontal and 0 <= section < len(self.HEADERS):
                return self.HEADERS[section]
            return section + 1 if orientation == Qt.Vertical else None

        def data(self, index, role=Qt.DisplayRole):
            if not index.isValid():
                return None
            task = self.tasks[index.row()]
            if role == Qt.DisplayRole:
                return self._display_value(task, index.column())
            if role == Qt.ToolTipRole and task.last_error:
                return task.last_error
            return None

        def flags(self, index):
            if not index.isValid():
                return Qt.NoItemFlags
            return Qt.ItemIsEnabled | Qt.ItemIsSelectable

        def task_at(self, row):
            if row < 0 or row >= len(self.tasks):
                return None
            return self.tasks[row]

        def account_name_for(self, task):
            account = self.account_by_alias.get(str(task.alias).strip())
            if account is not None:
                return account.account_name
            return task.account_name or task.alias or ""

        def _display_value(self, task, column):
            values = [
                self.account_name_for(task),
                task.item_id,
                task.new_title or "",
                os.path.basename(task.new_cover_path or ""),
                self._stage_text(task),
                self._result_text(task),
            ]
            return values[column] if 0 <= column < len(values) else None

        def _stage_text(self, task):
            if task.stage == "generated":
                return "待更新"
            if task.stage == "applied":
                return "已更新"
            return task.stage

        def _result_text(self, task):
            if task.status == "success" and task.stage == "generated":
                return "待更新"
            return self.STATUS_TEXT.get(task.status, task.status)


    class GenerateTab(QWidget):
        """Tab 2: prompt area plus generation task filters/list."""

        STATUS_FILTERS = [
            ("全部状态", "all"),
            ("待生成", "to_generate"),
            ("已生成", "generated"),
            ("失败", "failed"),
            ("略过", "skipped"),
            ("已更新", "applied"),
        ]

        def __init__(
            self,
            parent=None,
            db_path=None,
            config=None,
            status_callback=None,
            title_prompt_path=None,
            cover_prompts_dir=None,
        ):
            super().__init__(parent)
            self.config = appconfig.load_config() if config is None else config
            self.db_path = _database_path(db_path, self.config)
            self.status_callback = status_callback
            self.title_prompt_path = title_prompt_path or prompts.TITLE_PROMPT_PATH
            self.cover_prompts_dir = cover_prompts_dir or prompts.COVER_PROMPTS_DIR
            self.current_cover_template = None
            self.generate_worker = None
            self.generate_thread = None

            self.title_prompt_edit = QPlainTextEdit()
            self.title_prompt_edit.setObjectName("titlePromptEdit")
            self.title_prompt_edit.setPlaceholderText("标题提示词")
            self.title_prompt_edit.setPlainText(
                prompts.load_title_prompt(self.title_prompt_path)
            )
            self.save_title_button = QPushButton("保存标题提示词")
            self.cover_prompt_edit = QPlainTextEdit()
            self.cover_prompt_edit.setObjectName("coverPromptEdit")
            self.cover_prompt_edit.setPlaceholderText("封面提示词")
            self.cover_template_combo = QComboBox()
            self.cover_template_combo.setObjectName("coverTemplateCombo")
            self.new_cover_template_button = QPushButton("新建")
            self.save_cover_template_button = QPushButton("保存")
            self.save_cover_template_as_button = QPushButton("另存为")
            self.rename_cover_template_button = QPushButton("重命名")
            self.delete_cover_template_button = QPushButton("删除")
            self.insert_title_button = QPushButton("插入标题")
            self.preview_prompt_button = QPushButton("预览")
            self.generate_button = QPushButton("开始生成")
            self.stop_generate_button = QPushButton("停止")
            self.stop_generate_button.setEnabled(False)
            self.progress_label = QLabel("进度：标题0/0 · 封面0/0 · 失败0")

            left_panel = QWidget()
            left_layout = QVBoxLayout(left_panel)
            left_layout.setContentsMargins(0, 0, 12, 0)
            left_layout.addWidget(QLabel("标题提示词"))
            left_layout.addWidget(self.title_prompt_edit, 1)
            left_layout.addWidget(self.save_title_button)
            left_layout.addWidget(QLabel("封面提示词"))
            left_layout.addWidget(self.cover_template_combo)
            cover_template_layout = QHBoxLayout()
            cover_template_layout.addWidget(self.new_cover_template_button)
            cover_template_layout.addWidget(self.save_cover_template_button)
            cover_template_layout.addWidget(self.save_cover_template_as_button)
            cover_template_layout.addWidget(self.rename_cover_template_button)
            cover_template_layout.addWidget(self.delete_cover_template_button)
            left_layout.addLayout(cover_template_layout)
            left_layout.addWidget(self.cover_prompt_edit, 2)
            cover_action_layout = QHBoxLayout()
            cover_action_layout.addWidget(self.insert_title_button)
            cover_action_layout.addWidget(self.preview_prompt_button)
            left_layout.addLayout(cover_action_layout)

            self.batch_filter = QComboBox()
            self.batch_filter.setObjectName("batchFilter")
            self.shop_filter = QComboBox()
            self.shop_filter.setObjectName("shopFilter")
            self.status_filter = QComboBox()
            self.status_filter.setObjectName("statusFilter")
            for label, value in self.STATUS_FILTERS:
                self.status_filter.addItem(label, value)
            self.refresh_button = QPushButton("刷新")

            filter_layout = QHBoxLayout()
            filter_layout.addWidget(QLabel("批次"))
            filter_layout.addWidget(self.batch_filter, 2)
            filter_layout.addWidget(QLabel("店铺"))
            filter_layout.addWidget(self.shop_filter, 1)
            filter_layout.addWidget(QLabel("状态"))
            filter_layout.addWidget(self.status_filter, 1)
            filter_layout.addWidget(self.refresh_button)

            self.summary_label = QLabel("任务 0 条")
            self.task_table = QTableView()
            self.model = GenerateTaskTableModel(self.task_table)
            self.task_table.setModel(self.model)
            self.task_table.setSelectionBehavior(QAbstractItemView.SelectRows)
            self.task_table.setSelectionMode(QAbstractItemView.SingleSelection)
            self.task_table.setEditTriggers(QAbstractItemView.NoEditTriggers)
            self.task_table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
            self.task_table.verticalHeader().setVisible(False)

            right_panel = QWidget()
            right_layout = QVBoxLayout(right_panel)
            right_layout.setContentsMargins(12, 0, 0, 0)
            right_layout.addLayout(filter_layout)
            right_layout.addWidget(self.summary_label)
            right_layout.addWidget(self.task_table, 1)

            self.splitter = QSplitter(Qt.Horizontal)
            self.splitter.addWidget(left_panel)
            self.splitter.addWidget(right_panel)
            self.splitter.setStretchFactor(0, 1)
            self.splitter.setStretchFactor(1, 3)
            self.splitter.setSizes([280, 860])

            bottom_layout = QHBoxLayout()
            bottom_layout.addWidget(self.progress_label)
            bottom_layout.addStretch(1)
            bottom_layout.addWidget(self.generate_button)
            bottom_layout.addWidget(self.stop_generate_button)

            layout = QVBoxLayout(self)
            layout.setContentsMargins(18, 18, 18, 18)
            layout.addWidget(self.splitter, 1)
            layout.addLayout(bottom_layout)

            self.batch_filter.currentIndexChanged.connect(self.refresh_tasks)
            self.shop_filter.currentIndexChanged.connect(self.refresh_tasks)
            self.status_filter.currentIndexChanged.connect(self.refresh_tasks)
            self.refresh_button.clicked.connect(self.refresh_tasks)
            self.save_title_button.clicked.connect(self.save_title_prompt)
            self.cover_template_combo.currentIndexChanged.connect(self.load_selected_cover_template)
            self.new_cover_template_button.clicked.connect(self.new_cover_template)
            self.save_cover_template_button.clicked.connect(self.save_cover_template)
            self.save_cover_template_as_button.clicked.connect(self.save_cover_template_as)
            self.rename_cover_template_button.clicked.connect(self.rename_cover_template)
            self.delete_cover_template_button.clicked.connect(self.delete_cover_template)
            self.insert_title_button.clicked.connect(self.insert_title_placeholder)
            self.preview_prompt_button.clicked.connect(self.preview_cover_prompt)
            self.generate_button.clicked.connect(self.start_generate)
            self.stop_generate_button.clicked.connect(self.stop_generate)
            self.task_table.doubleClicked.connect(self.show_task_images)

            self.refresh_cover_templates()
            self.refresh_tasks()

        def _set_status(self, message):
            if self.status_callback is not None:
                self.status_callback(message)

        def save_title_prompt(self, checked=False):
            try:
                prompts.save_title_prompt(
                    self.title_prompt_edit.toPlainText(),
                    self.title_prompt_path,
                )
            except Exception as exc:
                self._show_prompt_error(exc)
                return
            self._set_status("标题提示词已保存")

        def refresh_cover_templates(self, selected=None):
            try:
                template_names = prompts.list_cover_templates(self.cover_prompts_dir)
            except Exception as exc:
                template_names = []
                self._show_prompt_error(exc)
            current = selected if selected is not None else self.current_cover_template
            self.cover_template_combo.blockSignals(True)
            self.cover_template_combo.clear()
            if template_names:
                for name in template_names:
                    self.cover_template_combo.addItem(name, name)
                index = self.cover_template_combo.findData(current)
                self.cover_template_combo.setCurrentIndex(index if index >= 0 else 0)
            else:
                self.cover_template_combo.addItem("默认", None)
                self.cover_template_combo.setCurrentIndex(0)
            self.cover_template_combo.blockSignals(False)
            self.load_selected_cover_template()

        def load_selected_cover_template(self, index=None):
            name = self.cover_template_combo.currentData()
            self.current_cover_template = name
            if name is None:
                self.cover_prompt_edit.setPlainText("")
                return
            try:
                self.cover_prompt_edit.setPlainText(
                    prompts.load_cover_template(name, self.cover_prompts_dir)
                )
            except Exception as exc:
                self.cover_prompt_edit.setPlainText("")
                self._show_prompt_error(exc)

        def new_cover_template(self, checked=False):
            name = self._ask_template_name("新建封面提示词模板")
            if not name:
                return
            try:
                prompts.save_cover_template(name, "", self.cover_prompts_dir)
            except Exception as exc:
                self._show_prompt_error(exc)
                return
            self.refresh_cover_templates(selected=name)
            self._set_status(f"封面提示词模板已新建：{name}")

        def save_cover_template(self, checked=False):
            name = self.current_cover_template
            if name is None:
                self.save_cover_template_as()
                return
            try:
                prompts.save_cover_template(
                    name,
                    self.cover_prompt_edit.toPlainText(),
                    self.cover_prompts_dir,
                )
            except Exception as exc:
                self._show_prompt_error(exc)
                return
            self._set_status(f"封面提示词模板已保存：{name}")

        def save_cover_template_as(self, checked=False):
            name = self._ask_template_name("另存封面提示词模板")
            if not name:
                return
            try:
                prompts.save_cover_template(
                    name,
                    self.cover_prompt_edit.toPlainText(),
                    self.cover_prompts_dir,
                )
            except Exception as exc:
                self._show_prompt_error(exc)
                return
            self.refresh_cover_templates(selected=name)
            self._set_status(f"封面提示词模板已另存为：{name}")

        def rename_cover_template(self, checked=False):
            old_name = self.current_cover_template
            if old_name is None:
                self._set_status("没有可重命名的封面提示词模板")
                return
            new_name = self._ask_template_name("重命名封面提示词模板", text=old_name)
            if not new_name or new_name == old_name:
                return
            try:
                prompts.rename_cover_template(old_name, new_name, self.cover_prompts_dir)
            except Exception as exc:
                self._show_prompt_error(exc)
                return
            self.refresh_cover_templates(selected=new_name)
            self._set_status(f"封面提示词模板已重命名：{new_name}")

        def delete_cover_template(self, checked=False):
            name = self.current_cover_template
            if name is None:
                self._set_status("没有可删除的封面提示词模板")
                return
            choice = QMessageBox.question(
                self,
                "删除封面提示词模板",
                f"确定删除「{name}」吗？",
            )
            if choice != QMessageBox.Yes:
                return
            try:
                prompts.delete_cover_template(name, self.cover_prompts_dir)
            except Exception as exc:
                self._show_prompt_error(exc)
                return
            self.refresh_cover_templates()
            self._set_status(f"封面提示词模板已删除：{name}")

        def insert_title_placeholder(self, checked=False):
            self.cover_prompt_edit.insertPlainText("{新标题}")

        def preview_cover_prompt(self, checked=False):
            task = self._selected_task()
            if task is None:
                self._set_status("没有可预览的任务")
                return
            rendered = prompts.render_prompt(
                self.cover_prompt_edit.toPlainText(),
                self._prompt_context(task),
            )
            QMessageBox.information(self, "封面提示词预览", rendered)
            self._set_status("封面提示词预览已生成")

        def start_generate(self, checked=False):
            if self.generate_thread is not None:
                self._set_status("AI 生成正在进行...")
                return
            tasks = [
                task for task in self.model.tasks
                if getattr(task, "stage", None) == "collected"
            ]
            if not tasks:
                self._set_status("当前筛选结果没有可生成任务")
                return
            prompt_values = {
                "title": self.title_prompt_edit.toPlainText(),
                "cover": self.cover_prompt_edit.toPlainText(),
            }
            worker = GenerateWorker(
                tasks,
                prompt_values,
                db_path=self.db_path,
                config=self.config,
            )
            worker.progress.connect(self._on_generate_progress)
            worker.row_updated.connect(self._on_generate_row_updated)
            worker.log.connect(self._set_status)
            worker.failed.connect(self._on_generate_failed)
            worker.finished.connect(self._on_generate_finished)
            worker.cancelled.connect(self._on_generate_cancelled)
            thread = run_worker(worker, thread_name="GenerateWorker", start=False)
            thread.finished.connect(lambda: self._forget_generate_thread(thread))
            self.generate_worker = worker
            self.generate_thread = thread
            self._set_generate_running(True)
            self._update_generate_progress(
                {"total": len(tasks), "title_done": 0, "cover_done": 0, "failed": 0}
            )
            self._set_status(f"开始 AI 生成：{len(tasks)} 条")
            thread.start()

        def stop_generate(self, checked=False):
            if self.generate_worker is not None:
                self.generate_worker.cancel()
                self._set_status("正在停止 AI 生成...")

        def show_task_images(self, index):
            task = self.model.task_at(index.row()) if index.isValid() else self._selected_task()
            if task is None:
                self._set_status("没有可预览的任务")
                return
            dialog = QDialog(self)
            dialog.setWindowTitle(f"封面对照：{task.item_id}")
            layout = QVBoxLayout(dialog)
            images_layout = QHBoxLayout()
            images_layout.addWidget(self._image_panel("旧封面", task.old_cover_path))
            images_layout.addWidget(self._image_panel("新封面", task.new_cover_path))
            layout.addLayout(images_layout)
            buttons = QDialogButtonBox(QDialogButtonBox.Close)
            buttons.rejected.connect(dialog.reject)
            layout.addWidget(buttons)
            dialog.resize(720, 420)
            dialog.exec()

        def _image_panel(self, title, path):
            panel = QWidget()
            layout = QVBoxLayout(panel)
            layout.addWidget(QLabel(title))
            image_label = QLabel()
            image_label.setAlignment(Qt.AlignCenter)
            image_label.setMinimumSize(260, 260)
            image_label.setWordWrap(True)
            if path and os.path.exists(str(path)):
                pixmap = QPixmap(str(path))
                if not pixmap.isNull():
                    image_label.setPixmap(
                        pixmap.scaled(
                            260,
                            260,
                            Qt.KeepAspectRatio,
                            Qt.SmoothTransformation,
                        )
                    )
                else:
                    image_label.setText(f"图片无法读取\n{path}")
            else:
                image_label.setText(f"无图片\n{path or ''}".strip())
            layout.addWidget(image_label, 1)
            return panel

        def _set_generate_running(self, running):
            self.generate_button.setEnabled(not running)
            self.stop_generate_button.setEnabled(running)
            self.refresh_button.setEnabled(not running)
            self.batch_filter.setEnabled(not running)
            self.shop_filter.setEnabled(not running)
            self.status_filter.setEnabled(not running)
            self.save_title_button.setEnabled(not running)
            self.save_cover_template_button.setEnabled(not running)
            self.save_cover_template_as_button.setEnabled(not running)
            self.rename_cover_template_button.setEnabled(not running)
            self.delete_cover_template_button.setEnabled(not running)

        def _forget_generate_thread(self, thread):
            if self.generate_thread is thread:
                self.generate_thread = None
                self.generate_worker = None

        def _on_generate_progress(self, payload):
            self._update_generate_progress(payload)
            self._set_status("生成进度：" + self._generate_progress_text(payload))

        def _on_generate_row_updated(self, task_id, fields):
            self.refresh_tasks()

        def _on_generate_failed(self, task_id, error):
            self._set_status(f"AI 生成失败：{error}")

        def _on_generate_finished(self, payload):
            self._set_generate_running(False)
            self.refresh_tasks()
            self._update_generate_progress(payload)
            if payload.get("error"):
                self._set_status(f"AI 生成失败：{payload.get('error')}")
                return
            self._set_status("AI 生成完成：" + self._generate_progress_text(payload))

        def _on_generate_cancelled(self, payload):
            self._set_generate_running(False)
            self.refresh_tasks()
            self._update_generate_progress(payload)
            self._set_status("AI 生成已停止：" + self._generate_progress_text(payload))

        def _update_generate_progress(self, payload):
            self.progress_label.setText("进度：" + self._generate_progress_text(payload))

        def _generate_progress_text(self, payload):
            return "标题{title}/{total} · 封面{cover}/{total} · 失败{failed}".format(
                title=payload.get("title_done", 0),
                cover=payload.get("cover_done", 0),
                total=payload.get("total", 0),
                failed=payload.get("failed", 0),
            )

        def _selected_task(self):
            index = self.task_table.currentIndex()
            if index.isValid():
                return self.model.task_at(index.row())
            if self.model.rowCount() > 0:
                return self.model.task_at(0)
            return None

        def _prompt_context(self, task):
            return {
                "old_title": task.old_title,
                "new_title": task.new_title,
                "item_id": task.item_id,
                "account_name": self.model.account_name_for(task),
                "alias": task.alias,
            }

        def _ask_template_name(self, title, text=""):
            value, ok = QInputDialog.getText(
                self,
                title,
                "模板名",
                QLineEdit.Normal,
                text,
            )
            if not ok:
                return None
            return str(value).strip()

        def _show_prompt_error(self, error):
            message = str(error)
            QMessageBox.warning(self, "提示词管理", message)
            self._set_status(message)

        def refresh_tasks(self, checked=False):
            try:
                db.init_db(self.db_path)
                batches = db.list_batches(path=self.db_path)
                accounts_rows = accounts.list_accounts(path=self.db_path, config=self.config)
                selected_batch = self.batch_filter.currentData()
                selected_shop = self.shop_filter.currentData()
                selected_status = self.status_filter.currentData() or "all"
                self._populate_batch_filter(batches, selected_batch)
                selected_batch = self.batch_filter.currentData()
                batch_tasks = db.list_tasks(batch_id=selected_batch, path=self.db_path)
                self._populate_shop_filter(batch_tasks, accounts_rows, selected_shop)
                selected_shop = self.shop_filter.currentData()
                filtered_tasks = [
                    task for task in batch_tasks
                    if self._matches_shop(task, selected_shop)
                    and self._matches_status(task, selected_status)
                ]
            except Exception as exc:
                self.model.set_tasks([], [])
                self.summary_label.setText("任务读取失败")
                self._set_status(f"AI 生成任务读取失败：{exc}")
                return
            self.model.set_tasks(filtered_tasks, accounts_rows)
            self.summary_label.setText(
                f"任务 {len(filtered_tasks)}/{len(batch_tasks)} 条"
            )

        def _populate_batch_filter(self, batches, selected_batch):
            previous = selected_batch if selected_batch in {batch.id for batch in batches} else None
            self.batch_filter.blockSignals(True)
            self.batch_filter.clear()
            self.batch_filter.addItem("全部批次", None)
            for batch in batches:
                self.batch_filter.addItem(self._batch_label(batch), batch.id)
            index = self.batch_filter.findData(previous)
            self.batch_filter.setCurrentIndex(index if index >= 0 else 0)
            self.batch_filter.blockSignals(False)

        def _populate_shop_filter(self, tasks, account_rows, selected_shop):
            account_by_alias = {
                str(account.alias).strip(): account
                for account in account_rows
                if str(account.alias).strip()
            }
            aliases = []
            for task in tasks:
                alias = str(task.alias).strip()
                if alias and alias not in aliases:
                    aliases.append(alias)
            previous = selected_shop if selected_shop in aliases else None
            self.shop_filter.blockSignals(True)
            self.shop_filter.clear()
            self.shop_filter.addItem("全部店铺", None)
            for alias in sorted(aliases, key=lambda value: self._shop_label(value, account_by_alias)):
                self.shop_filter.addItem(self._shop_label(alias, account_by_alias), alias)
            index = self.shop_filter.findData(previous)
            self.shop_filter.setCurrentIndex(index if index >= 0 else 0)
            self.shop_filter.blockSignals(False)

        def _batch_label(self, batch):
            source_files = batch.source_files
            first_file = os.path.basename(source_files[0]) if source_files else batch.id
            return f"{batch.created_at} · {first_file}"

        def _shop_label(self, alias, account_by_alias):
            account = account_by_alias.get(alias)
            if account is not None:
                return f"{account.account_name} ({alias})"
            return alias

        def _matches_shop(self, task, selected_shop):
            return selected_shop is None or str(task.alias).strip() == selected_shop

        def _matches_status(self, task, selected_status):
            if selected_status in (None, "all"):
                return True
            if selected_status == "to_generate":
                return task.stage == "collected" and task.status in {"success", "pending"}
            if selected_status == "generated":
                return task.stage == "generated"
            if selected_status == "applied":
                return task.stage == "applied"
            if selected_status == "failed":
                return task.status == "failed"
            if selected_status == "skipped":
                return task.status == "skipped"
            return True


    class ApplyTab(QWidget):
        """Tab 3: list generated tasks and confirm the update scope."""

        STATUS_FILTERS = [
            ("已生成", "generated"),
            ("失败", "failed"),
            ("已更新", "applied"),
            ("略过", "skipped"),
            ("全部状态", "all"),
        ]

        def __init__(
            self,
            parent=None,
            db_path=None,
            config=None,
            status_callback=None,
            open_accounts_callback=None,
        ):
            super().__init__(parent)
            self.config = appconfig.load_config() if config is None else config
            self.db_path = _database_path(db_path, self.config)
            self.status_callback = status_callback
            self.open_accounts_callback = open_accounts_callback
            self.apply_worker = None
            self.apply_thread = None

            self.batch_filter = QComboBox()
            self.batch_filter.setObjectName("applyBatchFilter")
            self.shop_filter = QComboBox()
            self.shop_filter.setObjectName("applyShopFilter")
            self.status_filter = QComboBox()
            self.status_filter.setObjectName("applyStatusFilter")
            for label, value in self.STATUS_FILTERS:
                self.status_filter.addItem(label, value)
            self.refresh_button = QPushButton("刷新")

            filter_layout = QHBoxLayout()
            filter_layout.addWidget(QLabel("批次"))
            filter_layout.addWidget(self.batch_filter, 2)
            filter_layout.addWidget(QLabel("店铺"))
            filter_layout.addWidget(self.shop_filter, 1)
            filter_layout.addWidget(QLabel("状态"))
            filter_layout.addWidget(self.status_filter, 1)
            filter_layout.addWidget(self.refresh_button)

            self.summary_label = QLabel("任务 0 条")
            self.risk_label = QLabel("点击「开始更新」后会先确认当前筛选范围；确认后才允许后续任务提交线上。")
            self.task_table = QTableView()
            self.model = ApplyTaskTableModel(self.task_table)
            self.task_table.setModel(self.model)
            self.task_table.setSelectionBehavior(QAbstractItemView.SelectRows)
            self.task_table.setSelectionMode(QAbstractItemView.SingleSelection)
            self.task_table.setEditTriggers(QAbstractItemView.NoEditTriggers)
            self.task_table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
            self.task_table.verticalHeader().setVisible(False)

            self.start_update_button = QPushButton("开始更新")
            self.stop_update_button = QPushButton("停止")
            self.write_back_button = QPushButton("回写结果到 Excel")
            self.stop_update_button.setEnabled(False)
            self.write_back_button.setEnabled(False)

            action_layout = QHBoxLayout()
            action_layout.addWidget(self.start_update_button)
            action_layout.addWidget(self.stop_update_button)
            action_layout.addStretch(1)
            action_layout.addWidget(self.write_back_button)

            layout = QVBoxLayout(self)
            layout.setContentsMargins(18, 18, 18, 18)
            layout.addLayout(filter_layout)
            layout.addWidget(self.risk_label)
            layout.addWidget(self.summary_label)
            layout.addWidget(self.task_table, 1)
            layout.addLayout(action_layout)

            self.batch_filter.currentIndexChanged.connect(self.refresh_tasks)
            self.shop_filter.currentIndexChanged.connect(self.refresh_tasks)
            self.status_filter.currentIndexChanged.connect(self.refresh_tasks)
            self.refresh_button.clicked.connect(self.refresh_tasks)
            self.start_update_button.clicked.connect(self.start_update)
            self.stop_update_button.clicked.connect(self.stop_update)

            self.refresh_tasks()

        def _set_status(self, message):
            if self.status_callback is not None:
                self.status_callback(message)

        def refresh_tasks(self, checked=False):
            try:
                db.init_db(self.db_path)
                batches = db.list_batches(path=self.db_path)
                account_rows = accounts.list_accounts(path=self.db_path, config=self.config)
                selected_batch = self.batch_filter.currentData()
                selected_shop = self.shop_filter.currentData()
                selected_status = self.status_filter.currentData() or "generated"
                self._populate_batch_filter(batches, selected_batch)
                selected_batch = self.batch_filter.currentData()
                batch_tasks = [
                    task for task in db.list_tasks(batch_id=selected_batch, path=self.db_path)
                    if self._is_update_task(task)
                ]
                self._populate_shop_filter(batch_tasks, account_rows, selected_shop)
                selected_shop = self.shop_filter.currentData()
                filtered_tasks = [
                    task for task in batch_tasks
                    if self._matches_shop(task, selected_shop)
                    and self._matches_status(task, selected_status)
                ]
            except Exception as exc:
                self.model.set_tasks([], [])
                self.summary_label.setText("任务读取失败")
                self._set_status(f"更新任务读取失败：{exc}")
                return
            self.model.set_tasks(filtered_tasks, account_rows)
            self.summary_label.setText(
                f"任务 {len(filtered_tasks)}/{len(batch_tasks)} 条"
            )

        def start_update(self, checked=False):
            if self.apply_thread is not None:
                self._set_status("更新正在进行...")
                return
            tasks = [
                task for task in self.model.tasks
                if self._is_actionable_task(task)
            ]
            if not tasks:
                self._set_status("当前筛选结果没有可更新任务")
                return
            answer = QMessageBox.question(
                self,
                "确认开始更新",
                self._confirmation_message(tasks),
                QMessageBox.Yes | QMessageBox.No,
                QMessageBox.No,
            )
            if answer != QMessageBox.Yes:
                self._set_status("已取消开始更新")
                return
            worker = ApplyWorker(tasks, db_path=self.db_path, config=self.config)
            worker.progress.connect(self._on_apply_progress)
            worker.row_updated.connect(self._on_apply_row_updated)
            worker.log.connect(self._set_status)
            worker.failed.connect(self._on_apply_failed)
            worker.finished.connect(self._on_apply_finished)
            worker.cancelled.connect(self._on_apply_cancelled)
            thread = run_worker(worker, thread_name="ApplyWorker", start=False)
            thread.finished.connect(lambda: self._forget_apply_thread(thread))
            self.apply_worker = worker
            self.apply_thread = thread
            self._set_apply_running(True)
            self._set_status(f"开始更新：{len(tasks)} 条")
            thread.start()

        def stop_update(self, checked=False):
            if self.apply_worker is not None:
                self.apply_worker.cancel()
                self._set_status("正在停止更新...")

        def _is_actionable_task(self, task):
            return (
                getattr(task, "stage", None) == "generated"
                and getattr(task, "status", None) in {"success", "pending", "failed"}
                and bool(getattr(task, "new_title", None) or getattr(task, "new_cover_path", None))
            )

        def _populate_batch_filter(self, batches, selected_batch):
            previous = selected_batch if selected_batch in {batch.id for batch in batches} else None
            self.batch_filter.blockSignals(True)
            self.batch_filter.clear()
            self.batch_filter.addItem("全部批次", None)
            for batch in batches:
                self.batch_filter.addItem(self._batch_label(batch), batch.id)
            index = self.batch_filter.findData(previous)
            self.batch_filter.setCurrentIndex(index if index >= 0 else 0)
            self.batch_filter.blockSignals(False)

        def _populate_shop_filter(self, tasks, account_rows, selected_shop):
            account_by_alias = {
                str(account.alias).strip(): account
                for account in account_rows
                if str(account.alias).strip()
            }
            aliases = []
            for task in tasks:
                alias = str(task.alias).strip()
                if alias and alias not in aliases:
                    aliases.append(alias)
            previous = selected_shop if selected_shop in aliases else None
            self.shop_filter.blockSignals(True)
            self.shop_filter.clear()
            self.shop_filter.addItem("全部店铺", None)
            for alias in sorted(aliases, key=lambda value: self._shop_label(value, account_by_alias)):
                self.shop_filter.addItem(self._shop_label(alias, account_by_alias), alias)
            index = self.shop_filter.findData(previous)
            self.shop_filter.setCurrentIndex(index if index >= 0 else 0)
            self.shop_filter.blockSignals(False)

        def _batch_label(self, batch):
            source_files = batch.source_files
            first_file = os.path.basename(source_files[0]) if source_files else batch.id
            return f"{batch.created_at} · {first_file}"

        def _shop_label(self, alias, account_by_alias):
            account = account_by_alias.get(alias)
            if account is not None:
                return f"{account.account_name} ({alias})"
            return alias

        def _status_label(self):
            return self.status_filter.currentText() or "已生成"

        def _batch_filter_label(self):
            return self.batch_filter.currentText() or "全部批次"

        def _shop_filter_label(self):
            return self.shop_filter.currentText() or "全部店铺"

        def _is_update_task(self, task):
            if task.stage in {"generated", "applied"}:
                return True
            return bool((task.new_title or task.new_cover_path) and task.status in {"failed", "skipped"})

        def _matches_shop(self, task, selected_shop):
            return selected_shop is None or str(task.alias).strip() == selected_shop

        def _matches_status(self, task, selected_status):
            if selected_status in (None, "all"):
                return True
            if selected_status == "generated":
                return task.stage == "generated" and task.status in {"success", "pending"}
            if selected_status == "failed":
                return task.status == "failed"
            if selected_status == "applied":
                return task.stage == "applied"
            if selected_status == "skipped":
                return task.status == "skipped"
            return True

        def _confirmation_message(self, tasks):
            return (
                "即将按当前筛选结果开始更新 Shopee 线上商品。\n\n"
                f"批次：{self._batch_filter_label()}\n"
                f"店铺：{self._shop_filter_label()}\n"
                f"状态：{self._status_label()}\n"
                f"任务数：{len(tasks)}\n\n"
                "确认后后续执行会打开商品编辑页、替换标题和封面，并点击「更新」提交线上。"
            )

        def _set_apply_running(self, running):
            self.start_update_button.setEnabled(not running)
            self.stop_update_button.setEnabled(running)
            self.refresh_button.setEnabled(not running)
            self.batch_filter.setEnabled(not running)
            self.shop_filter.setEnabled(not running)
            self.status_filter.setEnabled(not running)
            self.write_back_button.setEnabled(False)

        def _forget_apply_thread(self, thread):
            if self.apply_thread is thread:
                self.apply_thread = None
                self.apply_worker = None

        def _on_apply_progress(self, payload):
            self._set_status("更新进度：" + self._apply_progress_text(payload))

        def _on_apply_row_updated(self, task_id, fields):
            self.refresh_tasks()

        def _on_apply_failed(self, task_id, error):
            self._set_status(f"任务 {task_id} 更新失败：{error}")

        def _on_apply_finished(self, payload):
            self._set_apply_running(False)
            self.refresh_tasks()
            if payload.get("blocked"):
                self._show_apply_blocked(payload)
                return
            self._set_status("更新完成：" + self._apply_progress_text(payload))

        def _on_apply_cancelled(self, payload):
            self._set_apply_running(False)
            self.refresh_tasks()
            self._set_status("更新已停止：" + self._apply_progress_text(payload))

        def _apply_progress_text(self, payload):
            return "完成{done}/{total}，成功{applied}，略过{skipped}，失败{failed}".format(
                done=payload.get("done", 0),
                total=payload.get("total", 0),
                applied=payload.get("applied", 0),
                skipped=payload.get("skipped", 0),
                failed=payload.get("failed", 0),
            )

        def _show_apply_blocked(self, payload):
            lines = ["更新前检查未通过。"]
            if payload.get("no_accounts"):
                lines.append("当前没有配置账号。")
            not_running = payload.get("not_running") or []
            if not_running:
                lines.append(
                    "以下账号 Chrome 未启动或调试端口不可访问："
                    + "、".join(self._account_label(item) for item in not_running)
                )
            logged_out = payload.get("logged_out") or []
            if logged_out:
                lines.append(
                    "以下账号未登录 Shopee："
                    + "、".join(self._account_label(item) for item in logged_out)
                )
            self._show_account_guide("\n".join(lines))

        def _show_account_guide(self, message):
            full_message = (
                f"{message}\n\n"
                "请先到「④ 账号管理」配置账号、启动对应账号 Chrome，并确认已人工登录 Shopee。"
            )
            QMessageBox.warning(self, "账号未就绪", full_message)
            self._set_status(full_message.replace("\n", " "))
            if self.open_accounts_callback is not None:
                self.open_accounts_callback()

        def _account_label(self, item):
            if isinstance(item, dict):
                name = item.get("account_name") or item.get("alias") or ""
                alias = item.get("alias") or ""
                reason = item.get("reason")
            else:
                name = getattr(item, "account_name", "") or getattr(item, "alias", "")
                alias = getattr(item, "alias", "")
                reason = getattr(item, "reason", None)
            label = f"{name}({alias})" if alias and name != alias else (name or alias)
            return f"{label}: {reason}" if reason else label


    class CollectTab(QWidget):
        """Tab 1: import Excel files and list imported tasks."""

        def __init__(
            self,
            parent=None,
            db_path=None,
            config=None,
            status_callback=None,
            open_accounts_callback=None,
        ):
            super().__init__(parent)
            self.config = appconfig.load_config() if config is None else config
            self.db_path = _database_path(db_path, self.config)
            self.status_callback = status_callback
            self.open_accounts_callback = open_accounts_callback
            self.current_batch_id = None
            self.has_import_result = False
            self.last_import_stats = None
            self.collect_worker = None
            self.collect_thread = None
            self.write_back_worker = None
            self.write_back_thread = None

            self.import_button = QPushButton("导入 Excel...")
            self.refresh_button = QPushButton("刷新")
            self.collect_button = QPushButton("采集旧标题/旧封面")
            self.stop_collect_button = QPushButton("停止")
            self.write_back_button = QPushButton("回写旧数据到 Excel")
            self.stop_collect_button.setEnabled(False)

            toolbar = QHBoxLayout()
            toolbar.addWidget(self.import_button)
            toolbar.addWidget(self.refresh_button)
            toolbar.addWidget(self.collect_button)
            toolbar.addWidget(self.stop_collect_button)
            toolbar.addWidget(self.write_back_button)
            toolbar.addStretch(1)

            self.summary_label = QLabel("未导入任务")
            self.match_detail_label = QLabel("")
            self.show_all_button = QPushButton("全部")
            self.show_unmatched_button = QPushButton("未匹配(0)")

            summary_layout = QHBoxLayout()
            summary_layout.addWidget(self.summary_label)
            summary_layout.addStretch(1)
            summary_layout.addWidget(self.show_all_button)
            summary_layout.addWidget(self.show_unmatched_button)

            self.table = QTableView()
            self.model = TaskTableModel(self.table)
            self.table.setModel(self.model)
            self.table.setSelectionBehavior(QAbstractItemView.SelectRows)
            self.table.setSelectionMode(QAbstractItemView.SingleSelection)
            self.table.setEditTriggers(QAbstractItemView.NoEditTriggers)
            self.table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
            self.table.verticalHeader().setVisible(False)

            self.empty_label = QLabel("")

            layout = QVBoxLayout(self)
            layout.setContentsMargins(18, 18, 18, 18)
            layout.addLayout(toolbar)
            layout.addLayout(summary_layout)
            layout.addWidget(self.match_detail_label)
            layout.addWidget(self.table, 1)
            layout.addWidget(self.empty_label)

            self.import_button.clicked.connect(self.import_excel)
            self.refresh_button.clicked.connect(self.refresh_tasks)
            self.collect_button.clicked.connect(self.collect_old_data)
            self.stop_collect_button.clicked.connect(self.stop_collect)
            self.write_back_button.clicked.connect(self.write_back_old_data)
            self.show_all_button.clicked.connect(self.show_all_tasks)
            self.show_unmatched_button.clicked.connect(self.show_unmatched_tasks)

            self.refresh_tasks()

        def _set_status(self, message):
            if self.status_callback is not None:
                self.status_callback(message)

        def _show_error(self, message):
            QMessageBox.warning(self, "导入采集", str(message))
            self._set_status(str(message))

        def _show_account_guide(self, message):
            full_message = (
                f"{message}\n\n"
                "请先到「④ 账号管理」配置账号、启动对应账号 Chrome，并确认已人工登录 Shopee。"
            )
            QMessageBox.warning(self, "账号未就绪", full_message)
            self._set_status(full_message.replace("\n", " "))
            if self.open_accounts_callback is not None:
                self.open_accounts_callback()

        def _choose_excel_files(self):
            files, _selected_filter = QFileDialog.getOpenFileNames(
                self,
                "选择 Excel 文件",
                "",
                "Excel 文件 (*.xlsx *.xlsm)",
            )
            return files

        def import_excel(self, checked=False):
            file_paths = self._choose_excel_files()
            if not file_paths:
                return
            try:
                result = excel.import_tasks(file_paths, path=self.db_path)
            except Exception as exc:
                self._show_error(exc)
                return
            self.has_import_result = True
            self.last_import_stats = result.get("stats") or {}
            self.current_batch_id = result.get("batch_id")
            self.refresh_tasks()
            self._set_status(
                "导入完成：有效{valid}，无效{invalid}，入库{inserted}，未匹配{unmatched}".format(
                    valid=self.last_import_stats.get("valid", 0),
                    invalid=self.last_import_stats.get("invalid", 0),
                    inserted=self.last_import_stats.get("inserted", 0),
                    unmatched=self.model.unmatched_count(),
                )
            )

        def refresh_tasks(self, checked=False):
            try:
                db.init_db(self.db_path)
                if self.current_batch_id is None and self.has_import_result:
                    task_rows = []
                else:
                    task_rows = db.list_tasks(batch_id=self.current_batch_id, path=self.db_path)
                account_rows = accounts.list_accounts(path=self.db_path, config=self.config)
            except Exception as exc:
                self.model.set_tasks([], [])
                self.empty_label.setText("任务读取失败")
                self._set_status(f"任务读取失败：{exc}")
                return
            self.model.set_tasks(task_rows, account_rows)
            self._update_summary(task_rows, account_rows)
            self._update_empty_label(len(task_rows))

        def collect_old_data(self, checked=False):
            tasks = list(self.model.all_tasks)
            if not tasks:
                self._set_status("没有可采集任务")
                return
            worker = CollectWorker(tasks, db_path=self.db_path, config=self.config)
            worker.progress.connect(self._on_collect_progress)
            worker.row_updated.connect(self._on_collect_row_updated)
            worker.log.connect(self._set_status)
            worker.failed.connect(self._on_collect_failed)
            worker.finished.connect(self._on_collect_finished)
            worker.cancelled.connect(self._on_collect_cancelled)
            thread = run_worker(worker, thread_name="CollectWorker", start=False)
            thread.finished.connect(lambda: self._forget_collect_thread(thread))
            self.collect_worker = worker
            self.collect_thread = thread
            self._set_collect_running(True)
            thread.start()

        def stop_collect(self, checked=False):
            if self.collect_worker is not None:
                self.collect_worker.cancel()
                self._set_status("正在停止采集...")

        def write_back_old_data(self, checked=False):
            batch_id = self._active_batch_id()
            if not batch_id:
                self._set_status("没有可回写批次")
                return
            self._start_write_back(batch_id)

        def _start_write_back(self, batch_id, auto=False):
            if self.write_back_thread is not None:
                self._set_status("Excel 回写正在进行...")
                return False
            worker = WriteBackWorker(batch_id, db_path=self.db_path)
            worker.failed.connect(
                lambda task_id, error, auto=auto: self._on_write_back_failed(
                    task_id,
                    error,
                    auto=auto,
                )
            )
            worker.finished.connect(
                lambda payload, auto=auto: self._on_write_back_finished(
                    payload,
                    auto=auto,
                )
            )
            thread = run_worker(worker, thread_name="WriteBackWorker", start=False)
            thread.finished.connect(lambda: self._forget_write_back_thread(thread))
            self.write_back_worker = worker
            self.write_back_thread = thread
            self._set_write_back_running(True)
            self._set_status("正在自动回写旧数据到 Excel..." if auto else "正在回写旧数据到 Excel...")
            thread.start()
            return True

        def _active_batch_id(self):
            if self.current_batch_id:
                return self.current_batch_id
            batch_ids = {
                task.batch_id
                for task in self.model.all_tasks
                if getattr(task, "batch_id", None)
            }
            if len(batch_ids) == 1:
                return next(iter(batch_ids))
            return None

        def _set_collect_running(self, running):
            self.import_button.setEnabled(not running)
            self.refresh_button.setEnabled(not running)
            self.collect_button.setEnabled(not running)
            self.write_back_button.setEnabled(not running)
            self.stop_collect_button.setEnabled(running)

        def _set_write_back_running(self, running):
            self.import_button.setEnabled(not running)
            self.refresh_button.setEnabled(not running)
            self.collect_button.setEnabled(not running)
            self.write_back_button.setEnabled(not running)

        def _forget_collect_thread(self, thread):
            if self.collect_thread is thread:
                self.collect_thread = None
                self.collect_worker = None

        def _forget_write_back_thread(self, thread):
            if self.write_back_thread is thread:
                self.write_back_thread = None
                self.write_back_worker = None

        def _on_collect_progress(self, payload):
            self._set_status(
                "采集进度：{done}/{total}，成功{collected}，略过{skipped}，失败{failed}".format(
                    done=payload.get("done", 0),
                    total=payload.get("total", 0),
                    collected=payload.get("collected", 0),
                    skipped=payload.get("skipped", 0),
                    failed=payload.get("failed", 0),
                )
            )

        def _on_collect_row_updated(self, task_id, fields):
            self.refresh_tasks()

        def _on_collect_failed(self, task_id, error):
            self._set_status(f"任务 {task_id} 采集失败：{error}")

        def _on_collect_finished(self, payload):
            self._set_collect_running(False)
            self.refresh_tasks()
            if payload.get("blocked"):
                self._show_collect_blocked(payload)
                return
            message = "采集完成：成功{collected}，略过{skipped}，失败{failed}".format(
                collected=payload.get("collected", 0),
                skipped=payload.get("skipped", 0),
                failed=payload.get("failed", 0),
            )
            if payload.get("collected", 0) > 0:
                batch_id = self._active_batch_id()
                if batch_id and self._start_write_back(batch_id, auto=True):
                    self._set_status(f"{message}，正在自动回写 Excel...")
                    return
                if not batch_id:
                    self._set_status(f"{message}，但没有可回写批次")
                    return
                self._set_status(f"{message}，Excel 回写已在进行")
                return
            self._set_status(message)

        def _show_collect_blocked(self, payload):
            lines = ["采集前检查未通过。"]
            if payload.get("no_accounts"):
                lines.append("当前没有配置账号。")
            not_running = payload.get("not_running") or []
            if not_running:
                lines.append(
                    "以下账号 Chrome 未启动或调试端口不可访问："
                    + "、".join(self._account_label(item) for item in not_running)
                )
            logged_out = payload.get("logged_out") or []
            if logged_out:
                lines.append(
                    "以下账号未登录 Shopee："
                    + "、".join(self._account_label(item) for item in logged_out)
                )
            self._show_account_guide("\n".join(lines))

        def _account_label(self, item):
            if isinstance(item, dict):
                name = item.get("account_name") or item.get("alias") or ""
                alias = item.get("alias") or ""
                reason = item.get("reason")
            else:
                name = getattr(item, "account_name", "") or getattr(item, "alias", "")
                alias = getattr(item, "alias", "")
                reason = getattr(item, "reason", None)
            label = f"{name}({alias})" if alias and name != alias else (name or alias)
            return f"{label}: {reason}" if reason else label

        def _on_collect_cancelled(self, payload):
            self._set_collect_running(False)
            self.refresh_tasks()
            self._set_status(
                "采集已停止：完成{done}/{total}".format(
                    done=payload.get("done", 0),
                    total=payload.get("total", 0),
                )
            )

        def _on_write_back_failed(self, task_id, error, auto=False):
            message = f"Excel {'自动' if auto else ''}回写失败：{error}"
            if "被占用" in str(error):
                if auto:
                    message += "\n请关闭原 Excel 后点击「回写旧数据到 Excel」手动重试；SQLite 已保留采集结果，也可另存副本。"
                else:
                    message += "\n请关闭原 Excel 后重试；SQLite 已保留采集结果，也可另存副本。"
            QMessageBox.warning(self, "回写旧数据", message)
            self._set_status(message.replace("\n", " "))

        def _on_write_back_finished(self, payload, auto=False):
            self._set_write_back_running(False)
            if payload.get("ok") is False:
                error = payload.get("error") or "未知错误"
                retry_hint = "，可点击「回写旧数据到 Excel」手动重试" if auto else ""
                self._set_status(f"Excel {'自动' if auto else ''}回写失败：{error}{retry_hint}")
                return
            self.refresh_tasks()
            self._set_status(
                "Excel {prefix}回写完成：文件{files}，行{rows}".format(
                    prefix="自动" if auto else "",
                    files=payload.get("files", 0),
                    rows=payload.get("rows", 0),
                )
            )

        def show_all_tasks(self, checked=False):
            self.model.set_filter_mode("all")
            self._update_empty_label(len(self.model.all_tasks))

        def show_unmatched_tasks(self, checked=False):
            self.model.set_filter_mode("unmatched")
            self._update_empty_label(len(self.model.all_tasks))

        def _update_summary(self, task_rows, account_rows):
            stats = self.last_import_stats or {}
            unmatched = self._unmatched_count(task_rows, account_rows)
            matched = len(task_rows) - unmatched
            files = stats.get("files", 0 if not task_rows else 1)
            total = stats.get("total", len(task_rows))
            valid = stats.get("valid", len(task_rows))
            invalid = stats.get("invalid", 0)
            self.summary_label.setText(
                f"{files} 文件 · {total} 行 · 有效{valid}/无效{invalid} · 匹配{matched} · 未匹配{unmatched}"
            )
            self.match_detail_label.setText(self._match_detail(task_rows, account_rows))
            self.show_unmatched_button.setText(f"未匹配({unmatched})")
            self.show_unmatched_button.setEnabled(unmatched > 0)
            if unmatched == 0 and self.model.filter_mode == "unmatched":
                self.model.set_filter_mode("all")

        def _match_detail(self, task_rows, account_rows):
            account_by_alias = {
                str(account.alias).strip(): account
                for account in account_rows
                if str(account.alias).strip()
            }
            counts = {}
            for task in task_rows:
                account = account_by_alias.get(str(task.alias).strip())
                if account is None:
                    continue
                name = account.account_name or account.alias
                counts[name] = counts.get(name, 0) + 1
            if not counts:
                return "匹配明细：无"
            parts = [f"{name}{count}" for name, count in sorted(counts.items())]
            return "匹配明细：" + " · ".join(parts)

        def _unmatched_count(self, task_rows, account_rows):
            aliases = {
                str(account.alias).strip()
                for account in account_rows
                if str(account.alias).strip()
            }
            return sum(1 for task in task_rows if str(task.alias).strip() not in aliases)

        def _update_empty_label(self, total_rows):
            if total_rows == 0:
                self.empty_label.setText("暂无任务")
                return
            if self.model.rowCount() == 0 and self.model.filter_mode == "unmatched":
                self.empty_label.setText("没有未匹配任务")
                return
            unmatched = self.model.unmatched_count()
            self.empty_label.setText(
                "" if unmatched == 0 else f"{unmatched} 条任务别名未匹配账号，阶段显示为“略过”"
            )


    class AccountDialog(QDialog):
        """Dialog for adding or editing one account."""

        def __init__(self, parent=None, account=None, default_port=9222, config=None):
            super().__init__(parent)
            self._account = account
            self._config = config
            self.setWindowTitle("编辑账号" if account else "新增账号")

            self.account_name_edit = QLineEdit()
            self.alias_edit = QLineEdit()
            self.region_host_edit = QLineEdit(accounts.DEFAULT_REGION_HOST)
            self.debug_port_spin = QSpinBox()
            self.debug_port_spin.setRange(1, 65535)
            self.debug_port_spin.setValue(int(default_port))
            self.password_edit = QLineEdit()
            self.password_edit.setEchoMode(QLineEdit.Password)
            self.note_edit = QPlainTextEdit()
            self.note_edit.setMaximumHeight(76)
            self.slug_edit = QLineEdit()
            self.slug_edit.setReadOnly(True)
            self.user_data_dir_edit = QLineEdit()
            self.user_data_dir_edit.setReadOnly(True)

            if account is not None:
                self.account_name_edit.setText(account.account_name)
                self.alias_edit.setText(account.alias)
                self.region_host_edit.setText(account.region_host)
                self.debug_port_spin.setValue(int(account.debug_port))
                self.password_edit.setText(account.password or "")
                self.note_edit.setPlainText(account.note or "")
                self.slug_edit.setText(account.slug)
                self.user_data_dir_edit.setText(account.user_data_dir)

            form = QFormLayout()
            form.addRow("账号名", self.account_name_edit)
            form.addRow("别名", self.alias_edit)
            form.addRow("地区", self.region_host_edit)
            form.addRow("调试端口", self.debug_port_spin)
            form.addRow("密码", self.password_edit)
            form.addRow("备注", self.note_edit)
            form.addRow("slug", self.slug_edit)
            form.addRow("数据目录", self.user_data_dir_edit)

            buttons = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
            buttons.accepted.connect(self.accept)
            buttons.rejected.connect(self.reject)

            layout = QVBoxLayout(self)
            layout.addLayout(form)
            layout.addWidget(buttons)

            self.alias_edit.textChanged.connect(self._update_path_preview)
            self._update_path_preview()

        def _update_path_preview(self):
            alias = self.alias_edit.text().strip()
            if not alias:
                self.slug_edit.clear()
                self.user_data_dir_edit.clear()
                return
            try:
                slug = account_config.make_slug(alias)
                self.slug_edit.setText(slug)
                if self._account is not None and alias == self._account.alias:
                    self.user_data_dir_edit.setText(self._account.user_data_dir)
                else:
                    self.user_data_dir_edit.setText(
                        accounts.preview_user_data_dir(alias, config=self._config)
                    )
            except Exception:
                self.slug_edit.clear()
                self.user_data_dir_edit.clear()

        def values(self):
            return {
                "account_name": self.account_name_edit.text().strip(),
                "alias": self.alias_edit.text().strip(),
                "region_host": self.region_host_edit.text().strip(),
                "debug_port": self.debug_port_spin.value(),
                "password": self.password_edit.text(),
                "note": self.note_edit.toPlainText().strip(),
            }


    from .workers import BaseWorker, run_worker


    class GenerateWorker(BaseWorker):
        """Generate titles and covers for collected tasks."""

        def __init__(self, tasks, prompt_values, db_path=None, config=None):
            super().__init__()
            self.tasks = list(tasks)
            self.prompt_values = dict(prompt_values or {})
            self.db_path = db_path
            self.config = config

        def execute(self):
            account_rows = accounts.list_accounts(path=self.db_path, config=self.config)
            account_by_alias = {
                str(account.alias).strip(): account
                for account in account_rows
                if str(account.alias).strip()
            }
            return ai.generate_batch(
                self.tasks,
                self.prompt_values,
                ai_cfg={
                    "config": self.config,
                    "db_path": self.db_path,
                    "image_dir": appconfig.image_dir(self.config),
                    "account_by_alias": account_by_alias,
                    "on_task_update": self._emit_row_update,
                },
                on_progress=self.progress.emit,
                should_stop=self.should_cancel,
            )

        def _emit_row_update(self, task_id, fields):
            self.row_updated.emit(int(task_id), dict(fields or {}))


    class ApplyWorker(BaseWorker):
        """Apply generated title/cover changes to Shopee one task at a time."""

        def __init__(self, tasks, db_path=None, config=None, preflight=True):
            super().__init__()
            self.tasks = list(tasks)
            self.db_path = db_path
            self.config = config
            self.preflight = preflight

        def execute(self):
            account_rows = accounts.list_accounts(path=self.db_path, config=self.config)
            account_by_alias = {
                str(account.alias).strip(): account
                for account in account_rows
                if str(account.alias).strip()
            }
            eligible = [task for task in self.tasks if self._is_actionable_task(task)]
            total = len(eligible)
            applied = 0
            skipped = 0
            failed = 0
            done = 0

            if self.preflight:
                blocked = self._preflight_block(eligible, account_rows, account_by_alias)
                if blocked:
                    blocked.update(
                        {
                            "ok": False,
                            "blocked": True,
                            "total": total,
                            "done": 0,
                            "applied": 0,
                            "skipped": 0,
                            "failed": 0,
                        }
                    )
                    return blocked

            for task in eligible:
                if self.should_cancel():
                    break
                account = account_by_alias.get(str(task.alias).strip())
                if account is None:
                    skipped += 1
                    done += 1
                    reason = "别名未匹配账号"
                    db.mark_skipped(task.id, reason, path=self.db_path)
                    self.row_updated.emit(task.id, {"status": "skipped", "last_error": reason})
                    self._emit_progress(done, total, applied, skipped, failed)
                    continue

                try:
                    db.mark_running(task.id, "apply", path=self.db_path)
                    self.row_updated.emit(task.id, {"status": "running", "last_error": None})
                    result = editor.apply_task(account, task)
                    committed = bool(result.get("committed")) and not result.get("error")
                    error = result.get("error")
                    if committed:
                        db.set_applied(task.id, True, path=self.db_path)
                        applied += 1
                        self.row_updated.emit(
                            task.id,
                            {
                                "stage": "applied",
                                "status": "success",
                                "committed": 1,
                                "last_error": None,
                            },
                        )
                    else:
                        failed += 1
                        error = error or "更新未提交"
                        db.set_applied(task.id, False, error, path=self.db_path)
                        self.failed.emit(task.id, str(error))
                        self.row_updated.emit(
                            task.id,
                            {"status": "failed", "last_error": str(error), "committed": 0},
                        )
                except Exception as exc:
                    failed += 1
                    error = str(exc) or exc.__class__.__name__
                    db.set_applied(task.id, False, error, path=self.db_path)
                    self.failed.emit(task.id, error)
                    self.row_updated.emit(
                        task.id,
                        {"status": "failed", "last_error": error, "committed": 0},
                    )
                finally:
                    done += 1
                    self._emit_progress(done, total, applied, skipped, failed)

            return {
                "ok": failed == 0,
                "total": total,
                "done": done,
                "applied": applied,
                "skipped": skipped,
                "failed": failed,
            }

        def _is_actionable_task(self, task):
            return (
                getattr(task, "stage", None) == "generated"
                and getattr(task, "status", None) in {"success", "pending", "failed"}
                and bool(getattr(task, "new_title", None) or getattr(task, "new_cover_path", None))
            )

        def _preflight_block(self, eligible, account_rows, account_by_alias):
            if not account_rows:
                return {
                    "reason": "NO_ACCOUNTS",
                    "no_accounts": True,
                }
            required_accounts = []
            seen_aliases = set()
            for task in eligible:
                alias = str(task.alias).strip()
                account = account_by_alias.get(alias)
                if account is not None and alias not in seen_aliases:
                    required_accounts.append(account)
                    seen_aliases.add(alias)
            not_running = []
            logged_out = []
            for account in required_accounts:
                if not chrome.is_running(account.debug_port):
                    not_running.append(self._account_payload(account, "CDP 端口未响应"))
                    continue
                status = self._login_status(account)
                if not status.get("logged_in"):
                    logged_out.append(
                        self._account_payload(account, self._login_skip_reason(status))
                    )
            if not_running or logged_out:
                return {
                    "reason": "ACCOUNT_NOT_READY",
                    "not_running": not_running,
                    "logged_out": logged_out,
                }
            return None

        def _account_payload(self, account, reason=None):
            payload = {
                "account_name": account.account_name,
                "alias": account.alias,
                "debug_port": account.debug_port,
            }
            if reason:
                payload["reason"] = reason
            return payload

        def _emit_progress(self, done, total, applied, skipped, failed):
            self.progress.emit(
                {
                    "done": done,
                    "total": total,
                    "applied": applied,
                    "skipped": skipped,
                    "failed": failed,
                }
            )

        def _login_status(self, account):
            try:
                return accounts.detect_login(account, path=self.db_path, config=self.config)
            except Exception as exc:
                return {
                    "logged_in": False,
                    "reason": f"LOGIN_CHECK_FAILED: {exc}",
                }

        def _login_skip_reason(self, status):
            reason = status.get("reason")
            return f"账号未登录: {reason}" if reason else "账号未登录"


    class CollectWorker(BaseWorker):
        """Collect old title and cover for imported tasks."""

        def __init__(self, tasks, db_path=None, config=None, preflight=True):
            super().__init__()
            self.tasks = list(tasks)
            self.db_path = db_path
            self.config = config
            self.preflight = preflight

        def execute(self):
            account_rows = accounts.list_accounts(path=self.db_path, config=self.config)
            account_by_alias = {
                str(account.alias).strip(): account
                for account in account_rows
                if str(account.alias).strip()
            }
            eligible = [
                task for task in self.tasks
                if getattr(task, "stage", None) == "imported"
            ]
            total = len(eligible)
            collected = 0
            skipped = 0
            failed = 0
            done = 0

            if self.preflight:
                blocked = self._preflight_block(eligible, account_rows, account_by_alias)
                if blocked:
                    blocked.update(
                        {
                            "ok": False,
                            "blocked": True,
                            "total": total,
                            "done": 0,
                            "collected": 0,
                            "skipped": 0,
                            "failed": 0,
                        }
                    )
                    return blocked

            for task in eligible:
                if self.should_cancel():
                    break
                account = account_by_alias.get(str(task.alias).strip())
                if account is None:
                    skipped += 1
                    done += 1
                    reason = "别名未匹配账号"
                    db.mark_skipped(task.id, reason, path=self.db_path)
                    self.row_updated.emit(task.id, {"status": "skipped", "last_error": reason})
                    self._emit_progress(done, total, collected, skipped, failed)
                    continue

                status = self._login_status(account)
                if not status.get("logged_in"):
                    skipped += 1
                    done += 1
                    reason = self._login_skip_reason(status)
                    db.mark_skipped(task.id, reason, path=self.db_path)
                    self.row_updated.emit(task.id, {"status": "skipped", "last_error": reason})
                    self._emit_progress(done, total, collected, skipped, failed)
                    continue

                try:
                    db.mark_running(task.id, "collect", path=self.db_path)
                    self.row_updated.emit(task.id, {"status": "running"})
                    result = editor.collect(
                        account,
                        {
                            "item_id": task.item_id,
                            "old_cover_path": self._old_cover_path(account, task),
                        },
                    )
                    db.set_collected(
                        task.id,
                        result.get("old_title", ""),
                        result.get("old_cover_path", ""),
                        path=self.db_path,
                    )
                    collected += 1
                    self.row_updated.emit(
                        task.id,
                        {
                            "stage": "collected",
                            "status": "success",
                            "old_title": result.get("old_title", ""),
                            "old_cover_path": result.get("old_cover_path", ""),
                        },
                    )
                except Exception as exc:
                    failed += 1
                    error = str(exc) or exc.__class__.__name__
                    db.mark_failed(task.id, "collect", error, path=self.db_path)
                    self.failed.emit(task.id, error)
                    self.row_updated.emit(task.id, {"status": "failed", "last_error": error})
                finally:
                    done += 1
                    self._emit_progress(done, total, collected, skipped, failed)

            return {
                "ok": failed == 0,
                "total": total,
                "done": done,
                "collected": collected,
                "skipped": skipped,
                "failed": failed,
            }

        def _preflight_block(self, eligible, account_rows, account_by_alias):
            if not account_rows:
                return {
                    "reason": "NO_ACCOUNTS",
                    "no_accounts": True,
                }
            required_accounts = []
            seen_aliases = set()
            for task in eligible:
                alias = str(task.alias).strip()
                account = account_by_alias.get(alias)
                if account is not None and alias not in seen_aliases:
                    required_accounts.append(account)
                    seen_aliases.add(alias)
            not_running = []
            logged_out = []
            for account in required_accounts:
                if not chrome.is_running(account.debug_port):
                    not_running.append(self._account_payload(account, "CDP 端口未响应"))
                    continue
                status = self._login_status(account)
                if not status.get("logged_in"):
                    logged_out.append(
                        self._account_payload(account, self._login_skip_reason(status))
                    )
            if not_running or logged_out:
                return {
                    "reason": "ACCOUNT_NOT_READY",
                    "not_running": not_running,
                    "logged_out": logged_out,
                }
            return None

        def _account_payload(self, account, reason=None):
            payload = {
                "account_name": account.account_name,
                "alias": account.alias,
                "debug_port": account.debug_port,
            }
            if reason:
                payload["reason"] = reason
            return payload

        def _emit_progress(self, done, total, collected, skipped, failed):
            self.progress.emit(
                {
                    "done": done,
                    "total": total,
                    "collected": collected,
                    "skipped": skipped,
                    "failed": failed,
                }
            )

        def _login_status(self, account):
            try:
                return accounts.detect_login(account, path=self.db_path, config=self.config)
            except Exception as exc:
                return {
                    "logged_in": False,
                    "reason": f"LOGIN_CHECK_FAILED: {exc}",
                }

        def _login_skip_reason(self, status):
            reason = status.get("reason")
            return f"账号未登录: {reason}" if reason else "账号未登录"

        def _old_cover_path(self, account, task):
            image_root = appconfig.image_dir(self.config)
            return os.path.abspath(
                os.path.join(
                    image_root,
                    account.slug,
                    f"{task.item_id}_old.jpg",
                )
            )


    class WriteBackWorker(BaseWorker):
        """Write collected old fields back to Excel in a background thread."""

        def __init__(self, batch_id, db_path=None, excel_path=None):
            super().__init__()
            self.batch_id = batch_id
            self.db_path = db_path
            self.excel_path = excel_path

        def execute(self):
            result = excel.write_back(
                self.batch_id,
                excel_path=self.excel_path,
                path=self.db_path,
            )
            self.progress.emit(
                {
                    "done": result.get("rows", 0),
                    "total": result.get("rows", 0),
                    "files": result.get("files", 0),
                }
            )
            return result


    class AccountLoginCheckWorker(BaseWorker):
        def __init__(self, account, db_path=None, config=None, timeout=8):
            super().__init__()
            self.account = account
            self.db_path = db_path
            self.config = config
            self.timeout = timeout

        def execute(self):
            status = accounts.detect_login(
                self.account,
                timeout=self.timeout,
                path=self.db_path,
                config=self.config,
            )
            self.row_updated.emit(self.account.id, status)
            return {"alias": self.account.alias, "status": status}


    class AccountsTab(QWidget):
        COLUMNS = ["账号名", "别名", "地区", "端口", "登录状态", "备注"]

        def __init__(self, parent=None, db_path=None, config=None, status_callback=None):
            super().__init__(parent)
            self.db_path = db_path
            self.config = appconfig.load_config() if config is None else config
            self.status_callback = status_callback
            self.account_rows = []
            self.login_statuses = {}
            self.threads = []

            self.table = QTableWidget(0, len(self.COLUMNS))
            self.table.setHorizontalHeaderLabels(self.COLUMNS)
            self.table.setSelectionBehavior(QAbstractItemView.SelectRows)
            self.table.setSelectionMode(QAbstractItemView.SingleSelection)
            self.table.setEditTriggers(QAbstractItemView.NoEditTriggers)
            self.table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
            self.table.verticalHeader().setVisible(False)

            self.add_button = QPushButton("新增")
            self.edit_button = QPushButton("编辑")
            self.delete_button = QPushButton("删除")
            self.launch_button = QPushButton("启动登录")
            self.check_button = QPushButton("检测登录")
            self.shortcut_button = QPushButton("快捷方式")

            toolbar = QHBoxLayout()
            for button in (
                self.add_button,
                self.edit_button,
                self.delete_button,
                self.launch_button,
                self.check_button,
                self.shortcut_button,
            ):
                toolbar.addWidget(button)
            toolbar.addStretch(1)

            self.empty_label = QLabel("")

            layout = QVBoxLayout(self)
            layout.setContentsMargins(18, 18, 18, 18)
            layout.addLayout(toolbar)
            layout.addWidget(self.table, 1)
            layout.addWidget(self.empty_label)

            self.add_button.clicked.connect(self.add_account)
            self.edit_button.clicked.connect(self.edit_account)
            self.delete_button.clicked.connect(self.delete_account)
            self.launch_button.clicked.connect(self.launch_login)
            self.check_button.clicked.connect(self.check_login)
            self.shortcut_button.clicked.connect(self.create_shortcut)
            self.table.itemSelectionChanged.connect(self._update_button_state)
            self.table.doubleClicked.connect(self.edit_account)

            self.refresh_accounts()

        def _set_status(self, message):
            if self.status_callback is not None:
                self.status_callback(message)

        def _selected_account(self):
            selected = self.table.selectionModel().selectedRows()
            if not selected:
                return None
            row = selected[0].row()
            if row < 0 or row >= len(self.account_rows):
                return None
            return self.account_rows[row]

        def _update_button_state(self):
            has_selection = self._selected_account() is not None
            for button in (
                self.edit_button,
                self.delete_button,
                self.launch_button,
                self.check_button,
                self.shortcut_button,
            ):
                button.setEnabled(has_selection)

        def refresh_accounts(self):
            try:
                self.account_rows = accounts.list_accounts(
                    path=self.db_path,
                    config=self.config,
                )
            except Exception as exc:
                self.account_rows = []
                self._set_status(f"账号读取失败：{exc}")

            self.table.setRowCount(len(self.account_rows))
            for row, account in enumerate(self.account_rows):
                status = self.login_statuses.get(account.alias, "未知")
                values = [
                    account.account_name,
                    account.alias,
                    account.region_host,
                    str(account.debug_port),
                    status,
                    account.note or "",
                ]
                for column, value in enumerate(values):
                    item = QTableWidgetItem(value)
                    self.table.setItem(row, column, item)
            self.empty_label.setText("" if self.account_rows else "暂无账号")
            self._update_button_state()

        def _show_error(self, message):
            QMessageBox.warning(self, "账号管理", str(message))
            self._set_status(str(message))

        def add_account(self, checked=False):
            try:
                default_port = accounts.next_debug_port(
                    path=self.db_path,
                    config=self.config,
                )
            except Exception:
                default_port = appconfig.default_debug_port(self.config)
            dialog = AccountDialog(self, default_port=default_port, config=self.config)
            if dialog.exec() != QDialog.Accepted:
                return
            try:
                accounts.create_account(
                    path=self.db_path,
                    config=self.config,
                    **dialog.values(),
                )
            except Exception as exc:
                self._show_error(exc)
                return
            self.refresh_accounts()
            self._set_status("账号已新增")

        def edit_account(self, checked=False):
            account = self._selected_account()
            if account is None:
                return
            dialog = AccountDialog(
                self,
                account=account,
                default_port=account.debug_port,
                config=self.config,
            )
            if dialog.exec() != QDialog.Accepted:
                return
            try:
                updated = accounts.update_account(
                    account.alias,
                    path=self.db_path,
                    config=self.config,
                    **dialog.values(),
                )
            except Exception as exc:
                self._show_error(exc)
                return
            if updated.alias != account.alias:
                self.login_statuses.pop(account.alias, None)
            self.refresh_accounts()
            self._set_status("账号已保存")

        def delete_account(self, checked=False):
            account = self._selected_account()
            if account is None:
                return
            answer = QMessageBox.question(
                self,
                "删除账号",
                f"确认删除账号「{account.alias}」？",
                QMessageBox.Yes | QMessageBox.No,
                QMessageBox.No,
            )
            if answer != QMessageBox.Yes:
                return
            try:
                accounts.delete_account(account.alias, path=self.db_path, config=self.config)
            except Exception as exc:
                self._show_error(exc)
                return
            self.login_statuses.pop(account.alias, None)
            self.refresh_accounts()
            self._set_status("账号已删除")

        def launch_login(self, checked=False):
            account = self._selected_account()
            if account is None:
                return
            try:
                accounts.launch_for_login(account, config=self.config)
            except Exception as exc:
                self._show_error(exc)
                return
            self.login_statuses[account.alias] = "已启动"
            self.refresh_accounts()
            self._set_status("Chrome 已启动，请人工登录")

        def check_login(self, checked=False):
            account = self._selected_account()
            if account is None:
                return
            self.login_statuses[account.alias] = "检测中"
            self.refresh_accounts()
            worker = AccountLoginCheckWorker(
                account,
                db_path=self.db_path,
                config=self.config,
            )
            worker.finished.connect(self._on_login_check_finished)
            worker.failed.connect(
                lambda _task_id, error, alias=account.alias: self._on_login_check_failed(
                    alias,
                    error,
                )
            )
            thread = run_worker(worker, start=False)
            thread.finished.connect(lambda: self._forget_thread(thread))
            self.threads.append(thread)
            thread.start()

        def _forget_thread(self, thread):
            if thread in self.threads:
                self.threads.remove(thread)

        def _on_login_check_finished(self, payload):
            if payload.get("ok") is False and not payload.get("alias"):
                return
            alias = payload.get("alias")
            status = payload.get("status") or {}
            if alias:
                self.login_statuses[alias] = accounts.login_status_text(status)
            self.refresh_accounts()
            self._set_status("登录状态已刷新")

        def _on_login_check_failed(self, alias, error):
            self.login_statuses[alias] = "检测失败"
            self.refresh_accounts()
            self._set_status(f"登录检测失败：{error}")

        def create_shortcut(self, checked=False):
            account = self._selected_account()
            if account is None:
                return
            try:
                shortcut_path = accounts.create_shortcut(account, config=self.config)
            except Exception as exc:
                self._show_error(exc)
                return
            self._set_status(f"快捷方式已生成：{shortcut_path}")
            QMessageBox.information(self, "账号管理", f"快捷方式已生成：\n{shortcut_path}")


    class MainWindow(QMainWindow):
        """Main application window with the fixed five-tab workflow."""

        def __init__(self, db_path=None, config=None):
            super().__init__()
            self.config = appconfig.load_config() if config is None else config
            self.db_path = _database_path(db_path, self.config)
            self.setWindowTitle("cmshopee")
            self.resize(1180, 760)
            self.tabs = QTabWidget()
            self.tabs.setObjectName("mainTabs")
            self.tabs.setStyleSheet(TAB_STYLE)
            self.tabs.currentChanged.connect(self._on_tab_changed)
            for title in TAB_TITLES:
                self.tabs.addTab(self._build_tab(title), title)
            self.setCentralWidget(self.tabs)
            self.statusBar().showMessage("就绪")

        def _build_tab(self, title):
            if title == "① 导入采集":
                return CollectTab(
                    db_path=self.db_path,
                    config=self.config,
                    status_callback=self.statusBar().showMessage,
                    open_accounts_callback=lambda: self.open_accounts_tab(),
                )
            if title == "② AI生成":
                return GenerateTab(
                    db_path=self.db_path,
                    config=self.config,
                    status_callback=self.statusBar().showMessage,
                )
            if title == "③ 更新shopee":
                return ApplyTab(
                    db_path=self.db_path,
                    config=self.config,
                    status_callback=self.statusBar().showMessage,
                    open_accounts_callback=lambda: self.open_accounts_tab(),
                )
            if title == "④ 账号管理":
                return AccountsTab(
                    db_path=self.db_path,
                    config=self.config,
                    status_callback=self.statusBar().showMessage,
                )
            widget = QWidget()
            widget.setObjectName(title)
            layout = QVBoxLayout(widget)
            layout.setContentsMargins(18, 18, 18, 18)
            layout.addStretch(1)
            return widget

        def _on_tab_changed(self, index):
            self.statusBar().showMessage(f"当前：{self.tabs.tabText(index)}")

        def open_accounts_tab(self):
            self.tabs.setCurrentIndex(TAB_TITLES.index("④ 账号管理"))
else:
    class MainWindow(QMainWindow):
        def __init__(self):
            raise RuntimeError("PySide6 未安装，无法启动 GUI")


def _ensure_offscreen_for_headless_tests():
    if "PYTEST_CURRENT_TEST" in os.environ and "QT_QPA_PLATFORM" not in os.environ:
        os.environ["QT_QPA_PLATFORM"] = "offscreen"


def main() -> int:
    if QT_IMPORT_ERROR is not None:
        print("cmshopee GUI 无法启动：当前 Python 环境未安装 PySide6。")
        return 1
    _ensure_offscreen_for_headless_tests()
    app = QApplication.instance() or QApplication(sys.argv)
    window = MainWindow()
    window.show()
    return app.exec()