文件下载名称调优

src/Jiaowu.Api/Controllers/GradeAnalyticsController.cs

@@ -4,6 +4,7 @@ using Jiaowu.Api.Domain.System;
 using Jiaowu.Api.Infrastructure.Auth;
 using Jiaowu.Api.Infrastructure.Caching;
 using Jiaowu.Api.Infrastructure.Grades;
+using Jiaowu.Api.Infrastructure.Files;
 using Jiaowu.Api.Infrastructure.Persistence;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
@@ -227,7 +228,7 @@ public sealed class GradeAnalyticsController(
             });
 
         var content = GradeAnalysisWordReportGenerator.Generate(report, DateTime.Now);
-        var fileName = $"{SanitizeFileName(report.CourseCode)}-{SanitizeFileName(report.TaskNumber)}-成绩分析报告.docx";
+        var fileName = DownloadFileName.Export("成绩分析报告", ".docx", report.CourseCode, report.TaskNumber);
         return File(
             content,
             "application/vnd.openxmlformats-officedocument.wordprocessingml.document",