diff --git a/README.md b/README.md
index e889523..ffee47e 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,143 @@
-# WebWork
+# 学生成绩管理系统 (Student Grade Management System)
 
-这是一个基于 Node.js 后端和原生 HTML/CSS/JS 前端的 Web 项目。
+这是一个基于 Web 的学生成绩管理系统，旨在为学校提供一个简单、高效的成绩录入、查询和分析平台。系统支持三种角色：管理员、教师和学生，每种角色拥有独立的权限和功能界面。
 
-## 项目结构
+## 🛠️ 开发语言与技术栈
 
-- `backend/`: Node.js 服务端代码
-- `frontend/`: 前端静态资源
-- `database/`: 数据库初始化脚本
+本项目采用前后端分离的开发模式（但在部署上整合为一体），技术选型如下：
 
-## 快速开始
+- **后端 (Backend):**
+  - **Runtime:** Node.js (>=14.0.0)
+  - **Framework:** Express.js 4.x
+  - **Database:** SQLite3 (轻量级文件数据库，无需额外安装数据库服务)
+  - **Authentication:** Express-Session + BCrypt (安全密码存储)
+  - **Logging:** 自定义操作日志记录
 
-1. 进入 `backend` 目录，运行 `npm install` 安装依赖。
-2. 配置 `.env` 文件（参考 `.env.example` 或根据需要创建）。
-3. 启动服务器：`npm start`。
+- **前端 (Frontend):**
+  - **Structure:** HTML5
+  - **Styling:** CSS3, Bootstrap 5 (响应式设计)
+  - **Scripting:** Vanilla JavaScript (ES6+), Fetch API
+  - **Icons:** Font Awesome 6
+
+## 🏗️ 项目架构
+
+项目遵循 **MVC (Model-View-Controller)** 设计模式，结构清晰，易于维护。
+
+### 目录结构说明
+
+```
+WebWork/
+├── backend/                # 后端核心代码
+│   ├── config/             # 配置文件 (数据库连接等)
+│   ├── controllers/        # 控制器 (业务逻辑处理)
+│   ├── middleware/         # 中间件 (身份验证、错误处理)
+│   ├── models/             # 模型层 (数据库操作封装)
+│   ├── routes/             # 路由定义 (API 接口)
+│   ├── scripts/            # 维护脚本 (数据库迁移、修复数据)
+│   ├── services/           # 服务层 (复杂业务逻辑)
+│   ├── utils/              # 工具函数
+│   ├── server.js           # 程序入口
+│   └── database.sqlite     # SQLite 数据库文件
+├── frontend/               # 前端静态资源
+│   ├── public/             # 公共资源 (CSS, JS, Images)
+│   └── views/              # HTML 页面视图
+│       ├── admin/          # 管理员页面
+│       ├── auth/           # 认证页面 (登录/注册)
+│       ├── student/        # 学生页面
+│       └── teacher/        # 教师页面
+└── scripts/                # 快捷运行脚本 (Windows .bat)
+```
+
+## 🧩 功能模块详情
+
+### 1. 认证模块 (Authentication)
+- **登录/注册:** 支持学号/工号登录，新用户注册。
+- **角色分流:** 根据用户角色（学生、教师、管理员）自动跳转至对应的工作台。
+- **安全机制:** 密码加密存储，会话超时自动登出。
+
+### 2. 管理员模块 (Admin)
+- **仪表板:** 查看系统概览（用户总数、课程数等）。
+- **用户管理:**
+  - **学生管理:** 查看、编辑、删除学生信息。
+  - **教师管理:** 查看、编辑、删除教师信息，自动补全教师职级/部门信息。
+  - **分页优化:** 支持智能分页与快速跳转。
+- **成绩统计:** 全校/全班成绩概览与分析。
+- **系统设置:**
+  - 设置当前学期。
+  - 开启/关闭选课与查分功能。
+  - 数据维护（数据库备份、缓存清理、重置密码）。
+- **数据导出:** 支持导出学生、教师、成绩数据为 Excel 兼容的 CSV 格式。
+- **操作日志:** 审计系统内的关键操作记录。
+
+### 3. 教师模块 (Teacher)
+- **我的课程:** 查看所教授的课程列表。
+- **成绩录入:** 在线录入、修改学生成绩。
+- **成绩管理:** 查看班级成绩单，分析及格率与平均分。
+
+### 4. 学生模块 (Student)
+- **我的成绩:** 查询个人各科成绩、绩点 (GPA)。
+- **成绩分析:** 可视化展示成绩分布与趋势。
+- **个人信息:** 查看与编辑个人资料。
+
+## 🚀 部署与运行方式
+
+本项目无需复杂的环境配置，确保安装 Node.js 即可运行。
+
+### 环境要求
+- **Node.js:** v14.0.0 或更高版本
+- **OS:** Windows / macOS / Linux
+
+### 安装步骤
+
+1. **克隆/下载项目** 到本地目录。
+2. **安装依赖:**
+   打开终端（命令行），进入 `backend` 目录并运行：
+   ```bash
+   cd backend
+   npm install
+   ```
+
+### 数据库初始化 (首次运行)
+
+如果项目根目录下没有 `database.sqlite` 文件，或者需要重置数据库，请运行：
+```bash
+node backend/init_db.js
+```
+*注：该脚本会自动创建表结构并填充测试数据。*
+
+### 启动项目
+
+**方式一：使用快捷脚本 (Windows)**
+直接双击项目根目录下的 `scripts/start.bat` 即可启动。
+
+**方式二：命令行启动**
+在 `backend` 目录下运行：
+```bash
+npm start
+```
+
+启动成功后，打开浏览器访问：
+👉 **http://localhost:3000**
+
+## 🔧 常见维护操作
+
+- **备份数据库:** 
+  系统会自动在 `backend/backups/` 目录下创建数据库备份。管理员也可以在“系统设置”中手动备份。
+  
+- **修复数据:**
+  如果发现教师数据缺失（如部门、职称），可运行修复脚本：
+  ```bash
+  node backend/scripts/fix_teachers.js
+  ```
+
+- **数据库迁移:**
+  如果进行了版本更新（如添加新表），请按顺序运行 `scripts/` 目录下的 `migrate_vX.js` 脚本。
+
+## 📝 开发日志
+
+- **V1.0:** 基础功能实现（登录、成绩录入、查询）。
+- **V2.0:** 迁移至 SQLite，增加系统设置与操作日志。
+- **V3.0:** 完善教师管理，优化分页体验，增强数据导出功能。
+
+---
+© 2023-2024 学生成绩管理系统 | Designed for Efficiency
diff --git a/backend/backups/database-2025-12-22T15-15-32-013Z.sqlite b/backend/backups/database-2025-12-22T15-15-32-013Z.sqlite
deleted file mode 100644
index 58821b7..0000000
Binary files a/backend/backups/database-2025-12-22T15-15-32-013Z.sqlite and /dev/null differ
diff --git a/backend/backups/database-2025-12-22T15-39-29-371Z.sqlite b/backend/backups/database-2025-12-22T15-39-29-371Z.sqlite
deleted file mode 100644
index 362bda2..0000000
Binary files a/backend/backups/database-2025-12-22T15-39-29-371Z.sqlite and /dev/null differ
diff --git a/backend/init_db.js b/backend/init_db.js
index 6fc978a..3f37e92 100644
--- a/backend/init_db.js
+++ b/backend/init_db.js
@@ -28,6 +28,13 @@ const insertStudent = async (student) => {
     );
 };
 
+const insertTeacher = async (teacher) => {
+    await run(
+        'INSERT INTO teachers (id, name, department, title, contact_info) VALUES (?, ?, ?, ?, ?)',
+        [teacher.id, teacher.name, teacher.department, teacher.title, teacher.contact_info]
+    );
+};
+
 const insertClass = async (cls) => {
     return await run(
         'INSERT INTO classes (class_name, grade, major, teacher_id) VALUES (?, ?, ?, ?)',
@@ -91,6 +98,8 @@ const init = async () => {
         await run('DROP TABLE IF EXISTS students');
         await run('DROP TABLE IF EXISTS users');
         await run('DROP TABLE IF EXISTS operation_logs');
+        await run('DROP TABLE IF EXISTS system_settings');
+        await run('DROP TABLE IF EXISTS teachers');
 
         // Create tables
         console.log('创建表结构...');
@@ -174,8 +183,38 @@ const init = async () => {
             )
         `);
 
+        await run(`
+            CREATE TABLE teachers (
+                id TEXT PRIMARY KEY,
+                name TEXT NOT NULL,
+                department TEXT,
+                title TEXT,
+                contact_info TEXT,
+                FOREIGN KEY (id) REFERENCES users(id) ON DELETE CASCADE
+            )
+        `);
+
+        await run(`
+            CREATE TABLE system_settings (
+                key TEXT PRIMARY KEY,
+                value TEXT
+            )
+        `);
+
         console.log('生成基础数据...');
 
+        // 0. System Settings
+        const defaultSettings = [
+            ['system_name', '学校成绩管理系统'],
+            ['current_semester', '2023-2024-2'],
+            ['allow_course_selection', '1'],
+            ['allow_grade_check', '1']
+        ];
+        
+        for (const [key, value] of defaultSettings) {
+            await run('INSERT OR IGNORE INTO system_settings (key, value) VALUES (?, ?)', [key, value]);
+        }
+
         // 1. Admin
         await insertUser({
             id: 'admin',
@@ -187,9 +226,16 @@ const init = async () => {
 
         // 2. Teachers (20 teachers)
         const teachers = [];
+        const departments = ['计算机学院', '软件学院', '信息工程学院', '理学院', '外国语学院'];
+        const titles = ['教授', '副教授', '讲师', '助教'];
+
         for (let i = 1; i <= 20; i++) {
             const id = `T${1000 + i}`;
             const name = `教师${String.fromCharCode(65 + (i % 26))}${i}`;
+            const dept = departments[i % departments.length];
+            const title = titles[i % titles.length];
+            const contact = `139${Math.floor(Math.random() * 90000000 + 10000000)}`;
+
             await insertUser({
                 id,
                 name,
@@ -197,6 +243,15 @@ const init = async () => {
                 role: 'teacher',
                 class: null
             });
+
+            await insertTeacher({
+                id,
+                name,
+                department: dept,
+                title: title,
+                contact_info: contact
+            });
+
             teachers.push(id);
         }
 
diff --git a/backend/package.json b/backend/package.json
index 1ca49a0..f958015 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -13,9 +13,7 @@
     "cors": "^2.8.5",
     "dotenv": "^16.3.1",
     "express": "^4.18.2",
-    "express-mysql-session": "^3.0.0",
     "express-session": "^1.17.3",
-    "mysql2": "^3.6.0",
     "sqlite3": "^5.1.7"
   },
   "devDependencies": {
diff --git a/backend/scripts/fix_teachers.js b/backend/scripts/fix_teachers.js
deleted file mode 100644
index ad5cb02..0000000
--- a/backend/scripts/fix_teachers.js
+++ /dev/null
@@ -1,31 +0,0 @@
-const db = require('../config/database');
-
-async function fixTeachers() {
-    const departments = ['计算机学院', '软件学院', '信息工程学院', '理学院', '外国语学院'];
-    const titles = ['教授', '副教授', '讲师', '助教'];
-    
-    try {
-        const teachers = await db.query('SELECT id FROM teachers');
-        for (let i = 0; i < teachers.length; i++) {
-            const dept = departments[i % departments.length];
-            const title = titles[i % titles.length];
-            const contact = `139${Math.floor(Math.random() * 90000000 + 10000000)}`;
-            
-            await db.query(
-                'UPDATE teachers SET department = ?, title = ?, contact_info = ? WHERE id = ?',
-                [dept, title, contact, teachers[i].id]
-            );
-            
-            // Also sync back to users table's class field if needed (though we'll use teachers table now)
-            await db.query(
-                'UPDATE users SET class = ? WHERE id = ?',
-                [dept, teachers[i].id]
-            );
-        }
-        console.log('教师信息修复完成！');
-    } catch (err) {
-        console.error('修复失败:', err);
-    }
-}
-
-fixTeachers();
diff --git a/backend/scripts/migrate_v2.js b/backend/scripts/migrate_v2.js
deleted file mode 100644
index eb084b2..0000000
--- a/backend/scripts/migrate_v2.js
+++ /dev/null
@@ -1,48 +0,0 @@
-const db = require('../config/database');
-
-async function migrate() {
-    try {
-        console.log('Starting migration v2...');
-        
-        // 1. System Settings Table
-        await db.query(`
-            CREATE TABLE IF NOT EXISTS system_settings (
-                key TEXT PRIMARY KEY,
-                value TEXT
-            )
-        `);
-        
-        // Default settings
-        const defaultSettings = [
-            ['system_name', '学校成绩管理系统'],
-            ['current_semester', '2023-2024-2'],
-            ['allow_course_selection', '1'],
-            ['allow_grade_check', '1']
-        ];
-        
-        for (const [key, value] of defaultSettings) {
-            await db.query('INSERT OR IGNORE INTO system_settings (key, value) VALUES (?, ?)', [key, value]);
-        }
-        
-        // 2. Operation Logs Table
-        await db.query(`
-            CREATE TABLE IF NOT EXISTS operation_logs (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                user_id TEXT,
-                operation_type TEXT,
-                operation_target TEXT,
-                description TEXT,
-                ip_address TEXT,
-                created_at TEXT DEFAULT (datetime('now', 'localtime'))
-            )
-        `);
-        
-        console.log('Migration v2 completed successfully.');
-        process.exit(0);
-    } catch (error) {
-        console.error('Migration v2 failed:', error);
-        process.exit(1);
-    }
-}
-
-migrate();
diff --git a/backend/scripts/migrate_v3.js b/backend/scripts/migrate_v3.js
deleted file mode 100644
index fee0325..0000000
--- a/backend/scripts/migrate_v3.js
+++ /dev/null
@@ -1,33 +0,0 @@
-const db = require('../config/database');
-
-async function migrate() {
-    console.log('开始执行 v3 迁移: 创建 teachers 表...');
-    
-    try {
-        await db.query(`
-            CREATE TABLE IF NOT EXISTS teachers (
-                id TEXT PRIMARY KEY,
-                name TEXT NOT NULL,
-                department TEXT,
-                title TEXT,
-                contact_info TEXT,
-                FOREIGN KEY (id) REFERENCES users(id) ON DELETE CASCADE
-            )
-        `);
-
-        // 从 users 表中迁移现有的教师数据
-        const teachers = await db.query('SELECT id, name, class FROM users WHERE role = "teacher"');
-        for (const t of teachers) {
-            await db.query(
-                'INSERT OR IGNORE INTO teachers (id, name, department) VALUES (?, ?, ?)',
-                [t.id, t.name, t.class]
-            );
-        }
-
-        console.log('v3 迁移成功！');
-    } catch (err) {
-        console.error('v3 迁移失败:', err);
-    }
-}
-
-migrate();
diff --git a/backend/server.js b/backend/server.js
index 9615aa2..d8853be 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -1,7 +1,6 @@
 const express = require('express');
 const cors = require('cors');
 const session = require('express-session');
-// const MySQLStore = require('express-mysql-session')(session);
 const path = require('path');
 require('dotenv').config();
 
@@ -27,26 +26,9 @@ app.use(cors({
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
-// Session
-/*
-const sessionStore = new MySQLStore({
-    expiration: 86400000,
-    createDatabaseTable: true,
-    schema: {
-        tableName: 'sessions',
-        columnNames: {
-            session_id: 'session_id',
-            expires: 'expires',
-            data: 'data'
-        }
-    }
-}, db.pool);
-*/
-
 app.use(session({
     key: 'session_cookie',
     secret: process.env.SESSION_SECRET || 'your-secret-key',
-    // store: sessionStore, // Use MemoryStore for SQLite migration simplification
     resave: false,
     saveUninitialized: false,
     cookie: {
diff --git a/database/backup_2025-12-21T14-30-15-873Z.sql b/database/backup_2025-12-21T14-30-15-873Z.sql
deleted file mode 100644
index e69de29..0000000
diff --git a/database/backup_2025-12-21T14-30-37-825Z.sql b/database/backup_2025-12-21T14-30-37-825Z.sql
deleted file mode 100644
index 903f9b8..0000000
--- a/database/backup_2025-12-21T14-30-37-825Z.sql
+++ /dev/null
@@ -1,177 +0,0 @@
-
-
--- Table structure for table `classes`
-DROP TABLE IF EXISTS `classes`;
-CREATE TABLE `classes` (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '班级ID',
-  `class_name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '班级名称',
-  `grade` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '年级',
-  `major` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '专业',
-  `teacher_id` int DEFAULT NULL COMMENT '班主任ID',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  KEY `idx_class_name` (`class_name`) USING BTREE,
-  KEY `idx_teacher_id` (`teacher_id`) USING BTREE
-) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC COMMENT='班级表';
-
--- Dumping data for table `classes`
-INSERT INTO `classes` VALUES
-(1, '计算机2301', '2023', '计算机科学与技术', 2001, '2025-12-21 14:23:14', '2025-12-21 14:23:14'),
-(2, '软件工程2302', '2023', '软件工程', 2002, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-
-0
--- Table structure for table `courses`
-DROP TABLE IF EXISTS `courses`;
-CREATE TABLE `courses` (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '课程ID',
-  `course_code` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '课程代码',
-  `course_name` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '课程名称',
-  `credit` decimal(3,1) NOT NULL DEFAULT '2.0' COMMENT '学分',
-  `teacher_id` int NOT NULL COMMENT '授课教师ID',
-  `class_id` int NOT NULL COMMENT '授课班级ID',
-  `semester` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '学期',
-  `academic_year` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '学年',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  UNIQUE KEY `course_code` (`course_code`) USING BTREE,
-  KEY `idx_course_code` (`course_code`) USING BTREE,
-  KEY `idx_teacher_id` (`teacher_id`) USING BTREE,
-  KEY `idx_class_id` (`class_id`) USING BTREE
-) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC COMMENT='课程表';
-
--- Dumping data for table `courses`
-INSERT INTO `courses` VALUES
-(1, 'CS101', '高级程序设计', '4.0', 2001, 1, NULL, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14'),
-(2, 'SE201', '软件工程导论', '3.0', 2002, 2, NULL, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14'),
-(3, 'MAT101', '高等数学', '5.0', 2003, 1, NULL, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-
-
--- Table structure for table `grades`
-DROP TABLE IF EXISTS `grades`;
-CREATE TABLE `grades` (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '成绩ID',
-  `student_id` int NOT NULL COMMENT '学生ID',
-  `course_id` int NOT NULL COMMENT '课程ID',
-  `usual_score` decimal(5,2) DEFAULT NULL COMMENT '平时成绩',
-  `midterm_score` decimal(5,2) DEFAULT NULL COMMENT '期中成绩',
-  `final_score` decimal(5,2) DEFAULT NULL COMMENT '期末成绩',
-  `total_score` decimal(5,2) DEFAULT NULL COMMENT '总评成绩',
-  `grade_point` decimal(3,2) DEFAULT NULL COMMENT '绩点',
-  `grade_level` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '成绩等级（A/B/C/D/F）',
-  `teacher_id` int NOT NULL COMMENT '录入教师ID',
-  `remark` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci COMMENT '备注',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  UNIQUE KEY `uk_student_course` (`student_id`,`course_id`) USING BTREE,
-  KEY `idx_student_id` (`student_id`) USING BTREE,
-  KEY `idx_course_id` (`course_id`) USING BTREE,
-  KEY `idx_teacher_id` (`teacher_id`) USING BTREE,
-  KEY `idx_total_score` (`total_score`) USING BTREE
-) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC COMMENT='成绩表';
-
--- Dumping data for table `grades`
-INSERT INTO `grades` VALUES
-(1, 3001, 1, '90.00', '85.00', '88.00', '87.70', '3.00', NULL, 2001, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14'),
-(2, 3001, 3, '80.00', '75.00', '82.00', '79.30', '2.00', NULL, 2003, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14'),
-(3, 3002, 1, '95.00', '92.00', '94.00', '93.70', '4.00', NULL, 2001, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14'),
-(4, 3003, 2, '88.00', '80.00', '85.00', '84.40', '3.00', NULL, 2002, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-
-
--- Table structure for table `operation_logs`
-DROP TABLE IF EXISTS `operation_logs`;
-CREATE TABLE `operation_logs` (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '日志ID',
-  `user_id` int NOT NULL COMMENT '操作用户ID',
-  `operation_type` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '操作类型',
-  `operation_target` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '操作目标',
-  `operation_details` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci COMMENT '操作详情',
-  `ip_address` varchar(45) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT 'IP地址',
-  `user_agent` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci COMMENT '用户代理',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '操作时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  KEY `idx_user_id` (`user_id`) USING BTREE,
-  KEY `idx_operation_type` (`operation_type`) USING BTREE,
-  KEY `idx_created_at` (`created_at`) USING BTREE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC COMMENT='操作日志表';
-
-
--- Table structure for table `scores`
-DROP TABLE IF EXISTS `scores`;
-CREATE TABLE `scores` (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '成绩记录ID',
-  `student_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '学生ID',
-  `course` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '课程名称',
-  `score` decimal(5,2) NOT NULL COMMENT '成绩',
-  `teacher_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '教师ID',
-  `class` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '班级',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  KEY `idx_student_id` (`student_id`) USING BTREE,
-  KEY `idx_teacher_id` (`teacher_id`) USING BTREE,
-  KEY `idx_class` (`class`) USING BTREE,
-  CONSTRAINT `scores_ibfk_1` FOREIGN KEY (`student_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE RESTRICT,
-  CONSTRAINT `scores_ibfk_2` FOREIGN KEY (`teacher_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE RESTRICT,
-  CONSTRAINT `scores_chk_1` CHECK (((`score` >= 0) and (`score` <= 100)))
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC COMMENT='成绩记录表';
-
-
--- Table structure for table `sessions`
-DROP TABLE IF EXISTS `sessions`;
-CREATE TABLE `sessions` (
-  `session_id` varchar(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
-  `expires` int unsigned NOT NULL,
-  `data` mediumtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin,
-  PRIMARY KEY (`session_id`) USING BTREE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC;
-
--- Dumping data for table `sessions`
-INSERT INTO `sessions` VALUES
-('KY6QaavAiws7rkdEBFIFDoHefl2bxzlI', 1766334525, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T16:28:44.650Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"teststudent","name":"????","role":"student","class":"2023?1?"}}'),
-('KaDFs4HogLmkjS0HAs6qki6g2FmE3sTL', 1766334465, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T16:27:45.314Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"teststudent","name":"????","role":"student","class":"2023?1?"}}'),
-('P-_AKfysnsUwA6PypoYdyXCxa-_8TiCE', 1766413502, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-22T14:25:01.323Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"3001","name":"陈同学","role":"student","class":"计算机2301","studentInfo":{"id":"3001","name":"陈同学","class":"计算机2301"}}}'),
-('QAhXDQ1FOlhU6RhaFOm3ghRtLOW4hBTd', 1766334812, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T16:33:31.987Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"teststudent","name":"????","role":"student","class":"2023?1?"}}'),
-('SAuQyktAI9gAHpXbjARpe-9BL42pDRiV', 1766334764, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T16:32:43.695Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"teststudent","name":"????","role":"student","class":"2023?1?"}}'),
-('XduN1lYhGPeIaLTHbLTNVnTCBtKUCkJR', 1766334689, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T16:31:28.994Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"teststudent","name":"????","role":"student","class":"2023?1?"}}'),
-('Y59PFvvqK7M0DKZshc6ONTmFQjzGyMmV', 1766334426, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T16:27:05.673Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"teststudent","name":"????","role":"student","class":"2023?1?"}}'),
-('rlscT2Pi2EAyLXHs1CNXyQmNSiW8vEo4', 1766334271, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T16:24:30.682Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"teststudent","name":"????","role":"student","class":"2023?1?"}}'),
-('rsaOCJRjYQLPtUWlDmUFJgWcCYZbOCgJ', 1766410574, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-21T15:54:39.935Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"123","name":"经济局","role":"student","class":"123"}}'),
-('wXxRpNTGY0wqLaHsebSAsw1I6Pb7Ed6w', 1766410584, '{"cookie":{"originalMaxAge":86400000,"expires":"2025-12-22T13:35:43.191Z","secure":false,"httpOnly":true,"path":"/"},"user":{"id":"567","name":"急急急","role":"teacher","class":"567"}}');
-
-
--- Table structure for table `students`
-DROP TABLE IF EXISTS `students`;
-CREATE TABLE `students` (
-  `id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '学生ID（与users表id一致）',
-  `name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '姓名',
-  `class` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '班级',
-  PRIMARY KEY (`id`) USING BTREE,
-  CONSTRAINT `students_ibfk_1` FOREIGN KEY (`id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE RESTRICT
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC COMMENT='学生详细信息表';
-
--- Dumping data for table `students`
-INSERT INTO `students` VALUES
-('3001', '陈同学', '计算机2301'),
-('3002', '林同学', '计算机2301'),
-('3003', '黄同学', '软件工程2302'),
-('3004', '吴同学', '软件工程2302');
-
-
--- Table structure for table `users`
-DROP TABLE IF EXISTS `users`;
-CREATE TABLE `users` (
-  `id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '用户ID（学号/工号）',
-  `name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '姓名',
-  `password` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '密码（bcrypt加密）',
-  `role` enum('student','teacher','admin') CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '角色',
-  `class` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '班级（学生和教师需要，管理员为NULL）',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  KEY `idx_role` (`role`) USING BTREE,
-  KEY `idx_class` (`class`) USING BTREE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC COMMENT='用户表';
-
--- Dumping data for table `users`
diff --git a/database/init.sql b/database/init.sql
deleted file mode 100644
index 1ed7ce3..0000000
--- a/database/init.sql
+++ /dev/null
@@ -1,214 +0,0 @@
--- 学生成绩管理系统数据库初始化脚本
--- 创建数据库
-CREATE DATABASE IF NOT EXISTS score_management DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
-USE score_management;
-
--- 用户表（学生、教师、管理员）
-CREATE TABLE IF NOT EXISTS users (
-    id VARCHAR(20) PRIMARY KEY COMMENT '用户ID（学号/工号）',
-    name VARCHAR(50) NOT NULL COMMENT '姓名',
-    password VARCHAR(100) NOT NULL COMMENT '密码（bcrypt加密）',
-    role ENUM('student', 'teacher', 'admin') NOT NULL COMMENT '角色',
-    class VARCHAR(20) DEFAULT NULL COMMENT '班级（学生和教师需要，管理员为NULL）',
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-    INDEX idx_role (role),
-    INDEX idx_class (class)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户表';
-
--- students 表：学生详细信息（与 users 表 id 关联）
-CREATE TABLE IF NOT EXISTS students (
-    id VARCHAR(20) PRIMARY KEY COMMENT '学生ID（与users表id一致）',
-    name VARCHAR(50) NOT NULL COMMENT '姓名',
-    class VARCHAR(20) COMMENT '班级',
-    FOREIGN KEY (id) REFERENCES users(id) ON DELETE CASCADE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='学生详细信息表';
-
--- scores 表：成绩记录
-CREATE TABLE IF NOT EXISTS scores (
-    id INT AUTO_INCREMENT PRIMARY KEY COMMENT '成绩记录ID',
-    student_id VARCHAR(20) NOT NULL COMMENT '学生ID',
-    course VARCHAR(100) NOT NULL COMMENT '课程名称',
-    score DECIMAL(5,2) NOT NULL CHECK (score >= 0 AND score <= 100) COMMENT '成绩',
-    teacher_id VARCHAR(20) NOT NULL COMMENT '教师ID',
-    class VARCHAR(20) NOT NULL COMMENT '班级',
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-    FOREIGN KEY (student_id) REFERENCES users(id) ON DELETE CASCADE,
-    FOREIGN KEY (teacher_id) REFERENCES users(id) ON DELETE CASCADE,
-    INDEX idx_student_id (student_id),
-    INDEX idx_teacher_id (teacher_id),
-    INDEX idx_class (class)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='成绩记录表';
-
--- 班级表
-CREATE TABLE IF NOT EXISTS classes (
-    id INT PRIMARY KEY AUTO_INCREMENT COMMENT '班级ID',
-    class_name VARCHAR(50) NOT NULL COMMENT '班级名称',
-    grade VARCHAR(20) COMMENT '年级',
-    major VARCHAR(100) COMMENT '专业',
-    teacher_id INT COMMENT '班主任ID',
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-    INDEX idx_class_name (class_name),
-    INDEX idx_teacher_id (teacher_id)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='班级表';
-
--- 课程表
-CREATE TABLE IF NOT EXISTS courses (
-    id INT PRIMARY KEY AUTO_INCREMENT COMMENT '课程ID',
-    course_code VARCHAR(20) UNIQUE NOT NULL COMMENT '课程代码',
-    course_name VARCHAR(100) NOT NULL COMMENT '课程名称',
-    credit DECIMAL(3,1) NOT NULL DEFAULT 2.0 COMMENT '学分',
-    teacher_id INT NOT NULL COMMENT '授课教师ID',
-    class_id INT NOT NULL COMMENT '授课班级ID',
-    semester VARCHAR(20) COMMENT '学期',
-    academic_year VARCHAR(20) COMMENT '学年',
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-    INDEX idx_course_code (course_code),
-    INDEX idx_teacher_id (teacher_id),
-    INDEX idx_class_id (class_id)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='课程表';
-
--- 成绩表
-CREATE TABLE IF NOT EXISTS grades (
-    id INT PRIMARY KEY AUTO_INCREMENT COMMENT '成绩ID',
-    student_id INT NOT NULL COMMENT '学生ID',
-    course_id INT NOT NULL COMMENT '课程ID',
-    usual_score DECIMAL(5,2) COMMENT '平时成绩',
-    midterm_score DECIMAL(5,2) COMMENT '期中成绩',
-    final_score DECIMAL(5,2) COMMENT '期末成绩',
-    total_score DECIMAL(5,2) COMMENT '总评成绩',
-    grade_point DECIMAL(3,2) COMMENT '绩点',
-    grade_level VARCHAR(10) COMMENT '成绩等级（A/B/C/D/F）',
-    teacher_id INT NOT NULL COMMENT '录入教师ID',
-    remark TEXT COMMENT '备注',
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-    UNIQUE KEY uk_student_course (student_id, course_id),
-    INDEX idx_student_id (student_id),
-    INDEX idx_course_id (course_id),
-    INDEX idx_teacher_id (teacher_id),
-    INDEX idx_total_score (total_score)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='成绩表';
-
--- 操作日志表
-CREATE TABLE IF NOT EXISTS operation_logs (
-    id INT PRIMARY KEY AUTO_INCREMENT COMMENT '日志ID',
-    user_id INT NOT NULL COMMENT '操作用户ID',
-    operation_type VARCHAR(50) NOT NULL COMMENT '操作类型',
-    operation_target VARCHAR(100) COMMENT '操作目标',
-    operation_details TEXT COMMENT '操作详情',
-    ip_address VARCHAR(45) COMMENT 'IP地址',
-    user_agent TEXT COMMENT '用户代理',
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '操作时间',
-    INDEX idx_user_id (user_id),
-    INDEX idx_operation_type (operation_type),
-    INDEX idx_created_at (created_at)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='操作日志表';
-
--- 插入初始数据
--- 插入管理员用户（密码：admin123）
-INSERT INTO users (username, password, name, role, email, phone) VALUES 
-('admin', '$2b$10$N9qo8uLOickgx2ZMRZoMy.MrqK.3.6Z1zXjJX.3Q7JzQ7JzQ7JzQ7', '系统管理员', 'admin', 'admin@school.edu', '13800138000');
-
--- 插入示例班级
-INSERT INTO classes (class_name, grade, major) VALUES 
-('计算机科学与技术2023级1班', '2023', '计算机科学与技术'),
-('软件工程2023级1班', '2023', '软件工程'),
-('人工智能2023级1班', '2023', '人工智能');
-
--- 插入示例教师（密码：teacher123）
-INSERT INTO users (username, password, name, role, class_id, email, phone) VALUES 
-('t1001', '$2b$10$N9qo8uLOickgx2ZMRZoMy.MrqK.3.6Z1zXjJX.3Q7JzQ7JzQ7JzQ7', '张老师', 'teacher', 1, 'zhang@school.edu', '13800138001'),
-('t1002', '$2b$10$N9qo8uLOickgx2ZMRZoMy.MrqK.3.6Z1zXjJX.3Q7JzQ7JzQ7JzQ7', '李老师', 'teacher', 2, 'li@school.edu', '13800138002');
-
--- 插入示例学生（密码：student123）
-INSERT INTO users (username, password, name, role, class_id, email, phone) VALUES 
-('s2023001', '$2b$10$N9qo8uLOickgx2ZMRZoMy.MrqK.3.6Z1zXjJX.3Q7JzQ7JzQ7JzQ7', '张三', 'student', 1, 'zhangsan@school.edu', '13800138111'),
-('s2023002', '$2b$10$N9qo8uLOickgx2ZMRZoMy.MrqK.3.6Z1zXjJX.3Q7JzQ7JzQ7JzQ7', '李四', 'student', 1, 'lisi@school.edu', '13800138112'),
-('s2023003', '$2b$10$N9qo8uLOickgx2ZMRZoMy.MrqK.3.6Z1zXjJX.3Q7JzQ7JzQ7JzQ7', '王五', 'student', 2, 'wangwu@school.edu', '13800138113');
-
--- 插入示例课程
-INSERT INTO courses (course_code, course_name, credit, teacher_id, class_id, semester, academic_year) VALUES 
-('CS101', '计算机基础', 3.0, 2, 1, '2023-2024-1', '2023-2024'),
-('CS201', '数据结构', 4.0, 2, 1, '2023-2024-1', '2023-2024'),
-('SE101', '软件工程导论', 3.0, 3, 2, '2023-2024-1', '2023-2024'),
-('AI101', '人工智能基础', 3.5, 3, 3, '2023-2024-1', '2023-2024');
-
--- 插入示例成绩
-INSERT INTO grades (student_id, course_id, usual_score, midterm_score, final_score, total_score, grade_point, grade_level, teacher_id) VALUES 
-(3, 1, 85.00, 78.00, 82.00, 81.50, 3.2, 'B', 2),
-(3, 2, 90.00, 85.00, 88.00, 87.50, 3.7, 'A', 2),
-(4, 1, 78.00, 82.00, 80.00, 80.50, 3.0, 'B', 2),
-(5, 3, 88.00, 85.00, 90.00, 88.50, 3.8, 'A', 3);
-
--- 更新班级表的班主任信息
-UPDATE classes SET teacher_id = 2 WHERE id = 1;
-UPDATE classes SET teacher_id = 3 WHERE id = 2;
-
--- 创建视图：学生成绩详情视图
-CREATE OR REPLACE VIEW student_grade_details AS
-SELECT 
-    g.id,
-    g.student_id,
-    u1.name AS student_name,
-    u1.username AS student_no,
-    g.course_id,
-    c.course_code,
-    c.course_name,
-    c.credit,
-    g.usual_score,
-    g.midterm_score,
-    g.final_score,
-    g.total_score,
-    g.grade_point,
-    g.grade_level,
-    g.teacher_id,
-    u2.name AS teacher_name,
-    g.remark,
-    g.created_at,
-    g.updated_at
-FROM grades g
-JOIN users u1 ON g.student_id = u1.id
-JOIN courses c ON g.course_id = c.id
-JOIN users u2 ON g.teacher_id = u2.id;
-
--- 创建视图：班级成绩统计视图
-CREATE OR REPLACE VIEW class_grade_statistics AS
-SELECT 
-    cl.id AS class_id,
-    cl.class_name,
-    c.id AS course_id,
-    c.course_code,
-    c.course_name,
-    COUNT(g.id) AS student_count,
-    AVG(g.total_score) AS avg_score,
-    MAX(g.total_score) AS max_score,
-    MIN(g.total_score) AS min_score,
-    SUM(CASE WHEN g.grade_level = 'A' THEN 1 ELSE 0 END) AS a_count,
-    SUM(CASE WHEN g.grade_level = 'B' THEN 1 ELSE 0 END) AS b_count,
-    SUM(CASE WHEN g.grade_level = 'C' THEN 1 ELSE 0 END) AS c_count,
-    SUM(CASE WHEN g.grade_level = 'D' THEN 1 ELSE 0 END) AS d_count,
-    SUM(CASE WHEN g.grade_level = 'F' THEN 1 ELSE 0 END) AS f_count
-FROM classes cl
-JOIN courses c ON cl.id = c.class_id
-LEFT JOIN grades g ON c.id = g.course_id
-GROUP BY cl.id, c.id;
-
--- 显示表结构信息
-SHOW TABLES;
-
--- 显示各表记录数
-SELECT 'users' AS table_name, COUNT(*) AS record_count FROM users
-UNION ALL
-SELECT 'classes', COUNT(*) FROM classes
-UNION ALL
-SELECT 'courses', COUNT(*) FROM courses
-UNION ALL
-SELECT 'grades', COUNT(*) FROM grades
-UNION ALL
-SELECT 'operation_logs', COUNT(*) FROM operation_logs;
-
--- 显示视图
-SHOW FULL TABLES WHERE TABLE_TYPE = 'VIEW';
\ No newline at end of file
diff --git a/database/score_management.sql b/database/score_management.sql
deleted file mode 100644
index 467b0a9..0000000
--- a/database/score_management.sql
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- Navicat Premium Dump SQL
-
- Source Server         : DockerMySQLDB
- Source Server Type    : MySQL
- Source Server Version : 90500 (9.5.0)
- Source Host           : localhost:3306
- Source Schema         : score_management
-
- Target Server Type    : MySQL
- Target Server Version : 90500 (9.5.0)
- File Encoding         : 65001
-
- Date: 21/12/2025 22:47:56
-*/
-
-SET NAMES utf8mb4;
-SET FOREIGN_KEY_CHECKS = 0;
-
--- ----------------------------
--- Table structure for classes
--- ----------------------------
-DROP TABLE IF EXISTS `classes`;
-CREATE TABLE `classes`  (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '班级ID',
-  `class_name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '班级名称',
-  `grade` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '年级',
-  `major` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '专业',
-  `teacher_id` int NULL DEFAULT NULL COMMENT '班主任ID',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  INDEX `idx_class_name`(`class_name` ASC) USING BTREE,
-  INDEX `idx_teacher_id`(`teacher_id` ASC) USING BTREE
-) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '班级表' ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of classes
--- ----------------------------
-INSERT INTO `classes` VALUES (1, '计算机2301', '2023', '计算机科学与技术', 2001, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `classes` VALUES (2, '软件工程2302', '2023', '软件工程', 2002, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-
--- ----------------------------
--- Table structure for courses
--- ----------------------------
-DROP TABLE IF EXISTS `courses`;
-CREATE TABLE `courses`  (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '课程ID',
-  `course_code` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '课程代码',
-  `course_name` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '课程名称',
-  `credit` decimal(3, 1) NOT NULL DEFAULT 2.0 COMMENT '学分',
-  `teacher_id` int NOT NULL COMMENT '授课教师ID',
-  `class_id` int NOT NULL COMMENT '授课班级ID',
-  `semester` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '学期',
-  `academic_year` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '学年',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  UNIQUE INDEX `course_code`(`course_code` ASC) USING BTREE,
-  INDEX `idx_course_code`(`course_code` ASC) USING BTREE,
-  INDEX `idx_teacher_id`(`teacher_id` ASC) USING BTREE,
-  INDEX `idx_class_id`(`class_id` ASC) USING BTREE
-) ENGINE = InnoDB AUTO_INCREMENT = 4 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '课程表' ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of courses
--- ----------------------------
-INSERT INTO `courses` VALUES (1, 'CS101', '高级程序设计', 4.0, 2001, 1, NULL, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `courses` VALUES (2, 'SE201', '软件工程导论', 3.0, 2002, 2, NULL, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `courses` VALUES (3, 'MAT101', '高等数学', 5.0, 2003, 1, NULL, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-
--- ----------------------------
--- Table structure for grades
--- ----------------------------
-DROP TABLE IF EXISTS `grades`;
-CREATE TABLE `grades`  (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '成绩ID',
-  `student_id` int NOT NULL COMMENT '学生ID',
-  `course_id` int NOT NULL COMMENT '课程ID',
-  `usual_score` decimal(5, 2) NULL DEFAULT NULL COMMENT '平时成绩',
-  `midterm_score` decimal(5, 2) NULL DEFAULT NULL COMMENT '期中成绩',
-  `final_score` decimal(5, 2) NULL DEFAULT NULL COMMENT '期末成绩',
-  `total_score` decimal(5, 2) NULL DEFAULT NULL COMMENT '总评成绩',
-  `grade_point` decimal(3, 2) NULL DEFAULT NULL COMMENT '绩点',
-  `grade_level` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '成绩等级（A/B/C/D/F）',
-  `teacher_id` int NOT NULL COMMENT '录入教师ID',
-  `remark` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL COMMENT '备注',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  UNIQUE INDEX `uk_student_course`(`student_id` ASC, `course_id` ASC) USING BTREE,
-  INDEX `idx_student_id`(`student_id` ASC) USING BTREE,
-  INDEX `idx_course_id`(`course_id` ASC) USING BTREE,
-  INDEX `idx_teacher_id`(`teacher_id` ASC) USING BTREE,
-  INDEX `idx_total_score`(`total_score` ASC) USING BTREE
-) ENGINE = InnoDB AUTO_INCREMENT = 5 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '成绩表' ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of grades
--- ----------------------------
-INSERT INTO `grades` VALUES (1, 3001, 1, 90.00, 85.00, 88.00, 87.70, 3.00, NULL, 2001, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `grades` VALUES (2, 3001, 3, 80.00, 75.00, 82.00, 79.30, 2.00, NULL, 2003, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `grades` VALUES (3, 3002, 1, 95.00, 92.00, 94.00, 93.70, 4.00, NULL, 2001, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `grades` VALUES (4, 3003, 2, 88.00, 80.00, 85.00, 84.40, 3.00, NULL, 2002, NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-
--- ----------------------------
--- Table structure for operation_logs
--- ----------------------------
-DROP TABLE IF EXISTS `operation_logs`;
-CREATE TABLE `operation_logs`  (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '日志ID',
-  `user_id` int NOT NULL COMMENT '操作用户ID',
-  `operation_type` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '操作类型',
-  `operation_target` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '操作目标',
-  `operation_details` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL COMMENT '操作详情',
-  `ip_address` varchar(45) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT 'IP地址',
-  `user_agent` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL COMMENT '用户代理',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '操作时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  INDEX `idx_user_id`(`user_id` ASC) USING BTREE,
-  INDEX `idx_operation_type`(`operation_type` ASC) USING BTREE,
-  INDEX `idx_created_at`(`created_at` ASC) USING BTREE
-) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '操作日志表' ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of operation_logs
--- ----------------------------
-
--- ----------------------------
--- Table structure for scores
--- ----------------------------
-DROP TABLE IF EXISTS `scores`;
-CREATE TABLE `scores`  (
-  `id` int NOT NULL AUTO_INCREMENT COMMENT '成绩记录ID',
-  `student_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '学生ID',
-  `course` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '课程名称',
-  `score` decimal(5, 2) NOT NULL COMMENT '成绩',
-  `teacher_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '教师ID',
-  `class` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '班级',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  INDEX `idx_student_id`(`student_id` ASC) USING BTREE,
-  INDEX `idx_teacher_id`(`teacher_id` ASC) USING BTREE,
-  INDEX `idx_class`(`class` ASC) USING BTREE,
-  CONSTRAINT `scores_ibfk_1` FOREIGN KEY (`student_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE RESTRICT,
-  CONSTRAINT `scores_ibfk_2` FOREIGN KEY (`teacher_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE RESTRICT,
-  CONSTRAINT `scores_chk_1` CHECK ((`score` >= 0) and (`score` <= 100))
-) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '成绩记录表' ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of scores
--- ----------------------------
-
--- ----------------------------
--- Table structure for sessions
--- ----------------------------
-DROP TABLE IF EXISTS `sessions`;
-CREATE TABLE `sessions`  (
-  `session_id` varchar(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
-  `expires` int UNSIGNED NOT NULL,
-  `data` mediumtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL,
-  PRIMARY KEY (`session_id`) USING BTREE
-) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of sessions
--- ----------------------------
-INSERT INTO `sessions` VALUES ('KY6QaavAiws7rkdEBFIFDoHefl2bxzlI', 1766334525, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T16:28:44.650Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"teststudent\",\"name\":\"????\",\"role\":\"student\",\"class\":\"2023?1?\"}}');
-INSERT INTO `sessions` VALUES ('KaDFs4HogLmkjS0HAs6qki6g2FmE3sTL', 1766334465, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T16:27:45.314Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"teststudent\",\"name\":\"????\",\"role\":\"student\",\"class\":\"2023?1?\"}}');
-INSERT INTO `sessions` VALUES ('P-_AKfysnsUwA6PypoYdyXCxa-_8TiCE', 1766414033, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-22T14:25:01.323Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"3001\",\"name\":\"陈同学\",\"role\":\"student\",\"class\":\"计算机2301\",\"studentInfo\":{\"id\":\"3001\",\"name\":\"陈同学\",\"class\":\"计算机2301\"}}}');
-INSERT INTO `sessions` VALUES ('QAhXDQ1FOlhU6RhaFOm3ghRtLOW4hBTd', 1766334812, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T16:33:31.987Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"teststudent\",\"name\":\"????\",\"role\":\"student\",\"class\":\"2023?1?\"}}');
-INSERT INTO `sessions` VALUES ('SAuQyktAI9gAHpXbjARpe-9BL42pDRiV', 1766334764, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T16:32:43.695Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"teststudent\",\"name\":\"????\",\"role\":\"student\",\"class\":\"2023?1?\"}}');
-INSERT INTO `sessions` VALUES ('XduN1lYhGPeIaLTHbLTNVnTCBtKUCkJR', 1766334689, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T16:31:28.994Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"teststudent\",\"name\":\"????\",\"role\":\"student\",\"class\":\"2023?1?\"}}');
-INSERT INTO `sessions` VALUES ('Y59PFvvqK7M0DKZshc6ONTmFQjzGyMmV', 1766334426, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T16:27:05.673Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"teststudent\",\"name\":\"????\",\"role\":\"student\",\"class\":\"2023?1?\"}}');
-INSERT INTO `sessions` VALUES ('rlscT2Pi2EAyLXHs1CNXyQmNSiW8vEo4', 1766334271, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T16:24:30.682Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"teststudent\",\"name\":\"????\",\"role\":\"student\",\"class\":\"2023?1?\"}}');
-INSERT INTO `sessions` VALUES ('rsaOCJRjYQLPtUWlDmUFJgWcCYZbOCgJ', 1766410574, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-21T15:54:39.935Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"123\",\"name\":\"经济局\",\"role\":\"student\",\"class\":\"123\"}}');
-INSERT INTO `sessions` VALUES ('wXxRpNTGY0wqLaHsebSAsw1I6Pb7Ed6w', 1766410584, '{\"cookie\":{\"originalMaxAge\":86400000,\"expires\":\"2025-12-22T13:35:43.191Z\",\"secure\":false,\"httpOnly\":true,\"path\":\"/\"},\"user\":{\"id\":\"567\",\"name\":\"急急急\",\"role\":\"teacher\",\"class\":\"567\"}}');
-
--- ----------------------------
--- Table structure for students
--- ----------------------------
-DROP TABLE IF EXISTS `students`;
-CREATE TABLE `students`  (
-  `id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '学生ID（与users表id一致）',
-  `name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '姓名',
-  `class` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '班级',
-  PRIMARY KEY (`id`) USING BTREE,
-  CONSTRAINT `students_ibfk_1` FOREIGN KEY (`id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE RESTRICT
-) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '学生详细信息表' ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of students
--- ----------------------------
-INSERT INTO `students` VALUES ('3001', '陈同学', '计算机2301');
-INSERT INTO `students` VALUES ('3002', '林同学', '计算机2301');
-INSERT INTO `students` VALUES ('3003', '黄同学', '软件工程2302');
-INSERT INTO `students` VALUES ('3004', '吴同学', '软件工程2302');
-
--- ----------------------------
--- Table structure for users
--- ----------------------------
-DROP TABLE IF EXISTS `users`;
-CREATE TABLE `users`  (
-  `id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '用户ID（学号/工号）',
-  `name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '姓名',
-  `password` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '密码（bcrypt加密）',
-  `role` enum('student','teacher','admin') CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '角色',
-  `class` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '班级（学生和教师需要，管理员为NULL）',
-  `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
-  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
-  PRIMARY KEY (`id`) USING BTREE,
-  INDEX `idx_role`(`role` ASC) USING BTREE,
-  INDEX `idx_class`(`class` ASC) USING BTREE
-) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '用户表' ROW_FORMAT = DYNAMIC;
-
--- ----------------------------
--- Records of users
--- ----------------------------
-INSERT INTO `users` VALUES ('1000', '超级管理员', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'admin', NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `users` VALUES ('2001', '张教授', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'teacher', NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `users` VALUES ('2002', '李老师', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'teacher', NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `users` VALUES ('2003', '王助教', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'teacher', NULL, '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `users` VALUES ('3001', '陈同学', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'student', '计算机2301', '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `users` VALUES ('3002', '林同学', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'student', '计算机2301', '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `users` VALUES ('3003', '黄同学', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'student', '软件工程2302', '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-INSERT INTO `users` VALUES ('3004', '吴同学', '$2a$10$clM161mG1P9oAkxs6yQq5ugu83Gc/hrnVuL.zWRC/vBZ./5TWuYGa', 'student', '软件工程2302', '2025-12-21 14:23:14', '2025-12-21 14:23:14');
-
-SET FOREIGN_KEY_CHECKS = 1;