v0.6测试

frontend/api/save_session.php

@@ -101,9 +101,17 @@ $_SESSION['real_name'] = $data['real_name'] ?? '';
 $_SESSION['role'] = $data['role'] ?? '';
 $_SESSION['login_time'] = time();
 
-// 如果是学生，额外设置 student_id（与 user_id 相同）
+// 如果是学生，额外设置 student_id
 if ($data['user_type'] === 'student') {
-    $_SESSION['student_id'] = $data['user_id'];
+    if (empty($data['student_id'])) {
+        http_response_code(400);
+        echo json_encode([
+            'success' => false,
+            'message' => '学生类型必须提供 student_id'
+        ]);
+        exit();
+    }
+    $_SESSION['student_id'] = $data['student_id'];
 }
 
 // 保存 Session