feat: 知识管理平台精简版 - PyQt6桌面应用

主要功能:
- 账号管理：添加/编辑/删除账号，测试登录
- 浏览任务：批量浏览应读/选读内容并标记已读
- 截图管理：wkhtmltoimage截图，查看历史
- 金山文档：扫码登录/微信快捷登录，自动上传截图

技术栈:
- PyQt6 GUI框架
- Playwright 浏览器自动化
- SQLite 本地数据存储
- wkhtmltoimage 网页截图

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ui/main_window.py

@@ -0,0 +1,195 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+主窗口
+侧边栏导航 + 主内容区 + 日志输出区
+"""
+
+from PyQt6.QtWidgets import (
+    QMainWindow, QWidget, QVBoxLayout, QHBoxLayout,
+    QPushButton, QStackedWidget, QFrame, QLabel, QSplitter
+)
+from PyQt6.QtCore import Qt
+
+from .styles import get_stylesheet, LIGHT_THEME, DARK_THEME
+from .log_widget import LogWidget
+from .account_widget import AccountWidget
+from .browse_widget import BrowseWidget
+from .screenshot_widget import ScreenshotWidget
+from .kdocs_widget import KDocsWidget
+from .settings_widget import SettingsWidget
+
+
+class MainWindow(QMainWindow):
+    """主窗口"""
+
+    def __init__(self):
+        super().__init__()
+        self.setWindowTitle("知识管理平台助手 - 精简版")
+        self.setMinimumSize(1000, 700)
+        self.resize(1200, 800)
+
+        self._current_theme = "light"
+        self._setup_ui()
+        self._apply_theme("light")
+
+    def _setup_ui(self):
+        """设置UI布局"""
+        central_widget = QWidget()
+        self.setCentralWidget(central_widget)
+
+        main_layout = QHBoxLayout(central_widget)
+        main_layout.setContentsMargins(0, 0, 0, 0)
+        main_layout.setSpacing(0)
+
+        # 侧边栏
+        sidebar = self._create_sidebar()
+        main_layout.addWidget(sidebar)
+
+        # 右侧区域（内容 + 日志）
+        right_widget = QWidget()
+        right_layout = QVBoxLayout(right_widget)
+        right_layout.setContentsMargins(0, 0, 0, 0)
+        right_layout.setSpacing(0)
+
+        # 使用分割器可以调整日志区域大小
+        splitter = QSplitter(Qt.Orientation.Vertical)
+
+        # 主内容区
+        self.content_stack = QStackedWidget()
+        self._create_pages()
+        splitter.addWidget(self.content_stack)
+
+        # 日志区域
+        self.log_widget = LogWidget()
+        splitter.addWidget(self.log_widget)
+
+        # 设置初始比例
+        splitter.setSizes([600, 150])
+
+        right_layout.addWidget(splitter)
+        main_layout.addWidget(right_widget, 1)
+
+        # 连接日志信号
+        self._connect_log_signals()
+
+    def _create_sidebar(self) -> QWidget:
+        """创建侧边栏"""
+        sidebar = QFrame()
+        sidebar.setObjectName("sidebar")
+        sidebar.setFixedWidth(180)
+
+        layout = QVBoxLayout(sidebar)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+
+        # 标题
+        title = QLabel("📋 知识管理助手")
+        title.setObjectName("sidebar_title")
+        title.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(title)
+
+        # 分隔线
+        line = QFrame()
+        line.setFrameShape(QFrame.Shape.HLine)
+        line.setStyleSheet("background-color: rgba(255,255,255,0.1);")
+        layout.addWidget(line)
+
+        # 导航按钮
+        self._nav_buttons = []
+
+        nav_items = [
+            ("📝 账号管理", 0),
+            ("🔄 浏览任务", 1),
+            ("📸 截图管理", 2),
+            ("📤 金山文档", 3),
+            ("⚙️ 系统设置", 4),
+        ]
+
+        for text, index in nav_items:
+            btn = QPushButton(text)
+            btn.setCheckable(True)
+            btn.clicked.connect(lambda checked, idx=index: self._switch_page(idx))
+            layout.addWidget(btn)
+            self._nav_buttons.append(btn)
+
+        layout.addStretch()
+
+        # 版本信息
+        version_label = QLabel("v1.0.0")
+        version_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        version_label.setStyleSheet("color: rgba(255,255,255,0.5); font-size: 11px; padding: 8px;")
+        layout.addWidget(version_label)
+
+        # 默认选中第一个
+        self._nav_buttons[0].setChecked(True)
+
+        return sidebar
+
+    def _create_pages(self):
+        """创建各个页面"""
+        # 账号管理
+        self.account_widget = AccountWidget()
+        self.content_stack.addWidget(self.account_widget)
+
+        # 浏览任务
+        self.browse_widget = BrowseWidget()
+        self.content_stack.addWidget(self.browse_widget)
+
+        # 截图管理
+        self.screenshot_widget = ScreenshotWidget()
+        self.content_stack.addWidget(self.screenshot_widget)
+
+        # 金山文档
+        self.kdocs_widget = KDocsWidget()
+        self.content_stack.addWidget(self.kdocs_widget)
+
+        # 系统设置
+        self.settings_widget = SettingsWidget()
+        self.settings_widget.theme_changed.connect(self._apply_theme)
+        self.content_stack.addWidget(self.settings_widget)
+
+    def _connect_log_signals(self):
+        """连接各模块的日志信号到日志面板"""
+        self.account_widget.log_signal.connect(self.log_widget.append_log)
+        self.browse_widget.log_signal.connect(self.log_widget.append_log)
+        self.screenshot_widget.log_signal.connect(self.log_widget.append_log)
+        self.kdocs_widget.log_signal.connect(self.log_widget.append_log)
+        self.settings_widget.log_signal.connect(self.log_widget.append_log)
+
+    def _switch_page(self, index: int):
+        """切换页面"""
+        # 更新导航按钮状态
+        for i, btn in enumerate(self._nav_buttons):
+            btn.setChecked(i == index)
+
+        # 切换页面
+        self.content_stack.setCurrentIndex(index)
+
+    def _apply_theme(self, theme_name: str):
+        """应用主题"""
+        self._current_theme = theme_name
+        theme = LIGHT_THEME if theme_name == "light" else DARK_THEME
+        self.setStyleSheet(get_stylesheet(theme))
+
+    def log(self, message: str):
+        """记录日志"""
+        self.log_widget.append_log(message)
+
+    def closeEvent(self, event):
+        """窗口关闭事件"""
+        # 保存配置
+        from config import get_config, save_config
+        config = get_config()
+        config.theme = self._current_theme
+        save_config(config)
+
+        # 清理金山文档上传器
+        try:
+            from core.kdocs_uploader import get_kdocs_uploader
+            uploader = get_kdocs_uploader()
+            uploader.close()
+        except Exception:
+            pass
+
+        event.accept()