feat: 多班级版班级管理系统 v2.0

技术栈：Go (Gin + GORM) + PHP + MySQL 5.7 + Redis

主要功能：
- 多班级完全隔离（class_id 贯穿全系统）
- 后端 Go Gin（端口 56789），Nginx 反代
- 超级管理员独立登录（env 配置，默认账密 admin/Admin123）
- bcrypt 密码加密（无 PASSWORD_SALT）
- 科任老师/课代表新角色
- 课代表作业管理页面
- 排行榜分项排行（操行分/考勤/作业）
- 角色加减分上下限由班主任配置
- 家长改密功能（可开关）
- 班级角色按需开关
- 宿舍号格式：南0-000
- 周度/月度重置功能
- MySQL 5.7 兼容
- 43 轮代码审查 + 全部修复

开发者: Canglan
版权归属: Sea Network Technology Studio
许可证: Apache License 2.0

frontend/student/attendance.php

@@ -0,0 +1,83 @@
+<?php
+/**
+ * 多班级版班级管理系统 - 学生端考勤记录
+ * 
+ * 开发者: Canglan
+ * 联系方式: admin@sea-studio.top
+ * 版权归属: Sea Network Technology Studio
+ * 许可证: Apache License 2.0
+ * 
+ * 版权所有 © Sea Network Technology Studio
+ */
+
+require_once __DIR__ . '/../config.php';
+
+if (!isset($_SESSION['user_id']) || $_SESSION['user_type'] !== 'student') {
+    header('Location: /index.php');
+    exit();
+}
+
+$page_title = '考勤记录';
+$student_id = $_SESSION['student_id'];
+include __DIR__ . '/../includes/header.php';
+?>
+
+<div class="nav">
+    <a href="/student/dashboard.php" class="nav-item">首页</a>
+    <a href="/student/conduct_history.php" class="nav-item">操行分</a>
+    <a href="/student/homework.php" class="nav-item">作业</a>
+    <a href="/student/attendance.php" class="nav-item active">考勤</a>
+    <a href="/student/password.php" class="nav-item">修改密码</a>
+</div>
+
+<div class="container">
+    <div class="stats-grid">
+        <div class="stat-card"><div class="stat-label">出勤</div><div class="stat-value" id="attPresent">0</div></div>
+        <div class="stat-card"><div class="stat-label">缺勤</div><div class="stat-value" id="attAbsent">0</div></div>
+        <div class="stat-card"><div class="stat-label">迟到</div><div class="stat-value" id="attLate">0</div></div>
+        <div class="stat-card"><div class="stat-label">请假</div><div class="stat-value" id="attLeave">0</div></div>
+    </div>
+    
+    <div class="card">
+        <div class="card-title">考勤记录明细</div>
+        <div class="table-wrapper">
+            <table class="table">
+                <thead><tr><th>日期</th><th>状态</th><th>原因</th></tr></thead>
+                <tbody id="attendanceList"></tbody>
+            </table>
+        </div>
+    </div>
+</div>
+
+<script>
+const STUDENT_ID = <?php echo $student_id; ?>;
+
+async function loadAttendance() {
+    const res = await apiGet(`/api/student/attendance/${STUDENT_ID}`);
+    if (res && res.success) {
+        const stats = res.data.statistics;
+        document.getElementById('attPresent').textContent = stats.present || 0;
+        document.getElementById('attAbsent').textContent = stats.absent || 0;
+        document.getElementById('attLate').textContent = stats.late || 0;
+        document.getElementById('attLeave').textContent = stats.leave || 0;
+        
+        let html = '';
+        res.data.records.forEach(record => {
+            html += `<tr>
+                <td>${record.date}</td>
+                <td>${getStatusBadge(record.status, 'attendance')}</td>
+                <td>${escapeHtml(record.reason || '-')}</td>
+            </tr>`;
+        });
+        if (res.data.records.length === 0) {
+            html = '<tr><td colspan="3" style="text-align:center;">暂无记录</td></tr>';
+        }
+        document.getElementById('attendanceList').innerHTML = html;
+    }
+}
+
+loadAttendance();
+</script>
+<script src="/assets/js/student.js"></script>
+
+<?php include __DIR__ . '/../includes/footer.php'; ?>