fix: 修复指定题目id生成pdf接口的问题

app/Services/ExamPdfExportService.php

@@ -2133,6 +2133,7 @@ class ExamPdfExportService
                 'student' => $student,
                 'teacher' => $teacher,
                 'grading' => $grading,
+                'includeAnswer' => false, // exam-paper 视图需要这个变量
             ])->render();
 
             if (empty(trim($html))) {