修复考勤管理bug并加强了信息保护

frontend/admin/attendance.php

@@ -82,6 +82,11 @@ include __DIR__ . '/../includes/header.php';
     </div>
 </div>
 
+<style>
+.student-cell { display: flex; flex-direction: column; align-items: center; }
+.student-cell-name { font-size: 14px; font-weight: 500; }
+.student-cell-no { font-size: 11px; color: #999; }
+</style>
 <script>
 let currentStatus = 'absent';
 let studentsData = [];
@@ -116,14 +121,16 @@ async function loadStudents() {
 
 // 渲染学生方格
 function renderStudentGrid() {
+    const currentSlot = document.getElementById('attendanceSlot').value;
     let html = '';
     studentsData.forEach(student => {
-        const hasRecord = existingRecords.some(r => r.student_id === student.student_id);
-        html += `<div class="student-cell${hasRecord ? ' has-record' : ''}" 
-                     data-id="${student.student_id}" 
+        const hasRecord = existingRecords.some(r => r.student_id === student.student_id && (!r.slot || r.slot === currentSlot));
+        html += `<div class="student-cell${hasRecord ? ' has-record' : ''}"
+                     data-id="${student.student_id}"
                      data-name="${escapeHtml(student.name)}"
                      onclick="toggleStudent(this)">
-                     ${escapeHtml(student.name)}
+                     <span class="student-cell-name">${escapeHtml(student.name)}</span>
+                     <span class="student-cell-no">${escapeHtml(student.student_no)}</span>
                  </div>`;
     });
     if (studentsData.length === 0) {
@@ -154,7 +161,8 @@ function deselectAllStudents() {
 // 加载当天已有考勤记录（用于标记 .has-record）
 async function loadExistingRecords() {
     const date = document.getElementById('attendanceDate').value;
-    const res = await apiGet('/api/admin/attendance/records', { date });
+    const slot = document.getElementById('attendanceSlot').value;
+    const res = await apiGet('/api/admin/attendance/records', { date, slot });
     if (res && res.success) {
         existingRecords = res.data.records || [];
         renderStudentGrid(); // 重新渲染以标记 has-record
@@ -232,11 +240,14 @@ async function loadAttendanceRecords() {
     }
 }
 
-// 日期变化时重新加载
+// 日期或时段变化时重新加载
 document.getElementById('attendanceDate').addEventListener('change', function() {
     loadExistingRecords();
     loadAttendanceRecords();
 });
+document.getElementById('attendanceSlot').addEventListener('change', function() {
+    loadExistingRecords();
+});
 
 // 页面初始化
 loadStudents();