merge local code with remote

LICENSE

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+CaelLab BY-SA Code License
+
+Copyright (c) 2026 Yunyun(云云) By 虚舟实验室(CaelLab)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this work (the "Work"), to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Work, for personal, commercial, or
+non-commercial purposes, subject to the following conditions:
+
+1. Source Availability: If you distribute the Work, or any derivative work
+   based on the Work, you must make the complete corresponding source code
+   available under the terms of this same license.
+
+2. License Preservation: The above copyright notice and this permission notice
+   shall be included in all copies or substantial portions of the Work.
+
+3. ShareAlike: Any distributed derivative work must be licensed under the
+   CaelLab BY-SA Code License.
+
+THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

README.md

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+# 课堂小助手
+
+一款专为课堂教学设计的桌面辅助工具，基于 Electron 22.3.27 开发，兼容 Windows 7 及以上系统。
+
+## 功能特性
+
+### 高效计时
+- **倒计时**：支持 0-99 小时，可逐位调整
+- **正计时**：从 0 开始计时
+- **全屏模式**：计时数据铺满整个窗口，适合投影展示
+- **记忆功能**：自动保存上次倒计时设置
+
+### 随机摇号
+- 可设置最大号码（默认 75）
+- 支持 ±1 和 ±10 快速调整
+- 设置自动保存
+
+## 安装与运行
+
+### 开发环境
+```bash
+# 安装依赖
+npm install
+
+# 启动应用
+npm start
+```
+
+### 构建安装包
+```bash
+# 构建 Windows 安装包
+npm run build:win
+```
+
+构建完成后，安装包位于 `dist` 目录。
+
+## 配置文件
+
+配置文件位置：`%APPDATA%\classroom-assistant\ca\memory.ini`
+
+```ini
+[Random]
+MaxNumber=75
+
+[Time]
+LastSeconds=300
+```
+
+## 界面操作
+
+- **无键盘设计**：所有操作均可通过鼠标/触屏完成
+- **全屏按钮**：计时器右下角，点击后窗口最大化并铺满计时数据
+- **模式互斥**：倒计时和正计时运行中/暂停时不可切换，需重置后切换
+
+## 技术栈
+
+- Electron 22.3.27
+- 原生 HTML/CSS/JavaScript
+- ini 配置文件解析
+
+## 许可证
+
+MIT