fix: 修复status_label方法缺少end的语法错误

app/models/tcm_exam.rb

@@ -70,6 +70,7 @@ class TcmExam < ActiveRecord::Base
     when "failed" then "失败"
     else status || "-"
     end
+  end
 
   # 虚拟方法：调养与建议
   def advice_section