fix(packages): use file names for generic web downloads (#37514)

Fixes #37511.

Serve Generic package web asset downloads with the stored package filename

Signed-off-by: cyphercodes <cyphercodes@users.noreply.github.com>
Co-authored-by: cyphercodes <cyphercodes@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/user/package.go

@@ -566,7 +566,11 @@ func DownloadPackageFile(ctx *context.Context) {
 		return
 	}
 
-	packages_helper.ServePackageFile(ctx, s, u, pf)
+	packages_helper.ServePackageFile(ctx, s, u, pf, httplib.ServeHeaderOptions{
+		Filename:           pf.Name,
+		LastModified:       pf.CreatedUnix.AsLocalTime(),
+		ContentDisposition: httplib.ContentDispositionAttachment,
+	})
 }
 
 // ActionPackageTerraformLock locks a terraform state