add manage student password

static/teacher.js

@@ -1,6 +1,6 @@
 const state = { classes: [], snapshot: null, activeClass: '', username: '' };
 const el = id => document.getElementById(id);
-const adminTabs = ['groups', 'ungrouped', 'settings'];
+const adminTabs = ['groups', 'ungrouped', 'accounts', 'settings'];
 
 function renderUnauthenticated() {
   el('loginArea').classList.remove('hidden');
@@ -28,6 +28,56 @@ function renderState() {
   renderStatistics();
   renderGroups();
   renderUngrouped();
+  renderStudentAccounts();
+}
+
+function allStudents() {
+  return [
+    ...state.snapshot.groups.flatMap(group => group.members),
+    ...state.snapshot.ungrouped
+  ].sort((left, right) => String(left.student_no).localeCompare(String(right.student_no), 'zh-Hans-CN'));
+}
+
+function renderStudentAccounts() {
+  const keyword = el('studentNoSearch').value.trim().toLocaleLowerCase();
+  const students = allStudents().filter(student =>
+    String(student.student_no).toLocaleLowerCase().includes(keyword)
+  );
+  const select = el('studentSelect');
+  const previous = select.value;
+  select.innerHTML = students.length ? students.map(student => `
+    <option value="${student.id}">${text(student.student_no)} · ${text(student.name)}</option>
+  `).join('') : '<option value="">未找到匹配的学号</option>';
+  if (students.some(student => String(student.id) === previous)) {
+    select.value = previous;
+  }
+}
+
+async function submitStudentPassword(event) {
+  event.preventDefault();
+  const notice = el('studentPasswordNotice');
+  const select = el('studentSelect');
+  const student = allStudents().find(item => String(item.id) === select.value);
+  const newPassword = el('studentNewPassword').value;
+  const confirmPassword = el('studentConfirmPassword').value;
+  notice.textContent = '';
+  if (!student) {
+    notice.textContent = '请选择要修改密码的学生';
+    return;
+  }
+  if (newPassword !== confirmPassword) {
+    notice.textContent = '两次输入的新密码不一致';
+    return;
+  }
+  if (!requireConfirm(`确定修改 ${student.student_no} ${student.name} 的登录密码吗？修改后该学生需要重新登录。`)) return;
+  setButtonsDisabled(el('studentPasswordForm'), true);
+  const result = await api('teacher/student-password', {
+    method: 'POST', json: { student_id: Number(select.value), new_password: newPassword }
+  });
+  setButtonsDisabled(el('studentPasswordForm'), false);
+  notice.textContent = result.ok ? '' : result.message;
+  toast(result.message, !result.ok);
+  if (result.ok) el('studentPasswordForm').reset();
 }
 
 document.querySelectorAll('.admin-tab').forEach(button => {
@@ -263,6 +313,8 @@ async function logout() {
 
 el('loginForm').addEventListener('submit', submitLogin);
 el('teacherPasswordForm').addEventListener('submit', submitTeacherPassword);
+el('studentPasswordForm').addEventListener('submit', submitStudentPassword);
+el('studentNoSearch').addEventListener('input', renderStudentAccounts);
 el('groupLimitForm').addEventListener('submit', submitGroupLimit);
 el('logoutButton').addEventListener('click', logout);
 el('lockButton').addEventListener('click', toggleLock);