feat: align with upstream 1.5.9.9

server/api/auth/grade-class-options.get.ts

@@ -0,0 +1,11 @@
+import { fetchGradeClassOptions } from '~~/server/utils/grade-class-options'
+
+// 公开的年级班级选项接口（注册表单使用，无需 binding-token）
+export default defineEventHandler(async () => {
+  const classes = await fetchGradeClassOptions()
+
+  return {
+    success: true,
+    classes
+  }
+})