fix：更新优化2

src/common/middlewares/upload.middleware.ts

@@ -52,7 +52,14 @@ export class UploadMiddleware implements NestMiddleware {
   }
 
   use(req: Request, _res: Response, next: NextFunction): void {
-    this.upload.single('file')(req, _res, (err) => {
+    // @types/express 与 @types/multer 内嵌的 @types/express-serve-static-core 版本不一致，
+    // 运行时完全等价，这里用一次类型断言绕过编译期差异
+    const single = this.upload.single('file') as (
+      req: Request,
+      res: Response,
+      cb: (err: unknown) => void,
+    ) => void;
+    single(req, _res, (err) => {
       if (err) {
         next(new BadRequestException(err.message ?? '文件上传失败'));
         return;