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/assets/js/dashboard.js

@@ -0,0 +1,120 @@
+/**
+ * 多班级版班级管理系统 - 管理端首页JS
+ * 
+ * 开发者: Canglan
+ * 版权归属: Sea Network Technology Studio
+ * 
+ * 版权所有 © Sea Network Technology Studio
+ */
+
+(function() {
+'use strict';
+
+const role = window.PAGE_CONFIG.role;
+let totalStudents = 0;
+
+async function loadDashboard() {
+    // 并行加载学生数据和学期信息
+    const [studentsRes, semesterRes] = await Promise.all([
+        apiGet('/api/admin/students'),
+        apiGet('/api/semester/active')
+    ]);
+    
+    let statsHtml = '';
+    if (studentsRes && studentsRes.success) {
+        statsHtml += `
+            <div class="stat-card">
+                <div class="stat-label">学生总数</div>
+                <div class="stat-value">${studentsRes.data.total || 0}</div>
+            </div>
+        `;
+    }
+    
+    // 显示学期信息和当前周数
+    if (semesterRes && semesterRes.success && semesterRes.data) {
+        const sem = semesterRes.data;
+        const weekNum = sem.current_week;
+        let semesterInfo = escapeHtml(sem.semester_name);
+        if (weekNum && weekNum > 0) {
+            semesterInfo += ` · 第${weekNum}周`;
+        }
+        statsHtml += `
+            <div class="stat-card">
+                <div class="stat-label">当前学期</div>
+                <div class="stat-value" style="font-size:20px;">${semesterInfo}</div>
+            </div>
+        `;
+    }
+    
+    document.getElementById('dashboardStats').innerHTML = statsHtml;
+    
+    let quickActions = '';
+    if (role === '班主任' || role === '班长' || role === '学习委员' || role === '劳动委员' || role === '志愿委员') {
+        quickActions += '<button class="btn btn-primary" onclick="location.href=\'/admin/conduct.php\'">操行分管理</button>';
+    }
+    if (role === '班主任' || role === '学习委员') {
+        quickActions += '<button class="btn btn-primary" onclick="location.href=\'/admin/homework.php\'">作业扣分</button>';
+    }
+    if (role === '班主任' || role === '考勤委员') {
+        quickActions += '<button class="btn btn-primary" onclick="location.href=\'/admin/attendance.php\'">考勤管理</button>';
+    }
+    if (role === '班主任') {
+        quickActions += '<button class="btn btn-outline" onclick="location.href=\'/admin/students.php\'">导入学生</button>';
+        quickActions += '<button class="btn btn-secondary" onclick="location.href=\'/admin/conduct.php\'">导出德育分记录</button>';
+    }
+    document.getElementById('quickActions').innerHTML = quickActions || '<p>暂无快捷操作</p>';
+    
+    const rankingRes = await apiGet('/api/student/ranking', { limit: 100 });
+    if (rankingRes && rankingRes.success) {
+        totalStudents = rankingRes.data.total_students || 0;
+        let html = '';
+        rankingRes.data.ranking.forEach((student, index) => {
+            const rank = index + 1;
+            html += `<tr>
+                <td>${rank}</td>
+                <td>${escapeHtml(student.student_no)}</td>
+                <td>${escapeHtml(student.name)}</td>
+                <td>${student.total_points}</td>
+            </tr>`;
+        });
+        if (rankingRes.data.ranking.length === 0) {
+            html = '<tr><td colspan="4" style="text-align:center;">暂无数据</td></tr>';
+        }
+        document.getElementById('rankingList').innerHTML = html;
+    }
+}
+
+function applyPercentileFilter() {
+    const input = document.getElementById('percentileFilter');
+    const percentile = parseInt(input.value);
+    if (isNaN(percentile) || percentile < 1 || percentile > 100) {
+        showToast('请输入 1-100 之间的整数', 'error');
+        return;
+    }
+    const rows = document.getElementById('rankingList').querySelectorAll('tr');
+    if (rows.length === 0) return;
+    const showCount = Math.max(1, Math.floor(totalStudents * (percentile / 100)));
+    rows.forEach(function(row, index) {
+        row.style.display = index < showCount ? '' : 'none';
+    });
+}
+
+function resetPercentileFilter() {
+    document.getElementById('percentileFilter').value = 100;
+    const rows = document.getElementById('rankingList').querySelectorAll('tr');
+    rows.forEach(function(row) {
+        row.style.display = '';
+    });
+}
+
+document.getElementById('percentileFilter').addEventListener('keypress', function(e) {
+    if (e.key === 'Enter') applyPercentileFilter();
+});
+
+loadDashboard();
+
+window.loadDashboard = loadDashboard;
+window.applyPercentileFilter = applyPercentileFilter;
+window.resetPercentileFilter = resetPercentileFilter;
+
+})();