feat: 添加学生个人中心页面和数据库备份功能

refactor(auth): 重构认证模块适配Bootstrap 5样式
feat(controller): 在登录响应中返回用户对象
feat(server): 添加学生个人中心路由
refactor(models): 重构学生和成绩模型结构
style: 更新登录和注册页面UI设计
chore: 添加数据库备份脚本和空备份文件

backend/server.js

@@ -96,6 +96,9 @@ app.get('/dashboard', requirePageAuth, (req, res) => {
 app.get('/student/dashboard', requirePageAuth, requirePageRole(['student']), (req, res) => {
     res.sendFile(path.join(__dirname, '../frontend/views/student/dashboard.html'));
 });
+app.get('/student/profile', requirePageAuth, requirePageRole(['student']), (req, res) => {
+    res.sendFile(path.join(__dirname, '../frontend/views/student/profile.html'));
+});
 
 // Teacher Pages
 const teacherPageRouter = express.Router();