feat: 判卷学案增加划线文案

resources/views/pdf/exam-grading.blade.php

@@ -248,6 +248,7 @@
             <span>姓名：{{ $student['name'] ?? '________' }}</span>
             <span>得分：________</span>
         </div>
+        <div style="font-size:13px;margin-top:10px;color:#333;">请根据答案和解析进行批改，在回答正确的 □ 前划 /</div>
     </div>
 
     @include('components.exam.paper-body', ['questions' => $questions, 'grading' => true])